Patent Publication Number: US-2022216936-A1

Title: Randomly-Modified First Network to Second Network Communication

Description:
CROSS-REFERENCE 
     This application is a divisional application of, and claims priority to, U.S. application Ser. No. 15/933,931 filed on Mar. 23, 2018. U.S. application Ser. No. 15/933,931 is hereby incorporated by reference. 
    
    
     GOVERNMENT INTEREST 
     The innovation described herein may be manufactured, used, imported, sold, and licensed by or for the Government of the United States of America without the payment of any royalty thereon or therefor. 
    
    
     BACKGROUND 
     A pair of radios can attempt to transmit voice communications between one another. While some voice communications can be benign, others can be sensitive in nature. Due to this sensitivity, the radios can try to protect the transmission of these voice communications. If the radios are part of a secure network, then they can employ an encryption scheme. However, if the radios are not part of a secure network, then they may not be able share an encryption scheme and not have an encryption scheme option for radio-to-radio communications. 
     SUMMARY 
     In one embodiment, a system, that is at least partially hardware, comprises a reception component, an addition component, and a transmission component. The reception component can be configured to receive a non-encrypted voice communication from a first secure radio network. The addition component can be configured to add random noise to the non-encrypted voice communication from the first secure radio network such that a first secure radio network-based noise-added non-encrypted voice communication is produced. The transmission component can be configured to transmit the first secure radio network-based noise-added non-encrypted voice communication to a second secure radio network. 
     In another embodiment, a system, that can be part of a first secure network, can comprise a reception component, an encryption component, and a transmission component. The reception component can be configured to receive a randomly-modified second secure network-based non-encrypted voice communication by way of a non-encrypted communication channel. The encryption component can be configured to encrypt, according to a first network encryption scheme, the randomly-modified second secure network-based non-encrypted voice communication into an encrypted first secure network voice communication. The transmission component can be configured to transmit the encrypted first secure network voice communication along the first secure network. The randomly-modified second secure network-based non-encrypted voice communication can be derived from an encrypted second secure network voice communication from a second secure network. The first secure network and the second secure network can be distinct networks. The encrypted second secure network voice communication can be encrypted in accordance with a second network encryption scheme. The first network encryption scheme and the second network encryption scheme can be different encryption schemes. 
     In yet another embodiment, a system configured to be part of a first secure network comprises a reception component, a decryption component, and a transmission component. The reception component can be configured to receive an encrypted first secure network voice communication with an intended destination of a second secure network. The decryption component can be configured to decrypt the encrypted first secure network voice communication with the intended destination of the second secure network into a decrypted first secure network voice communication. The transmission component can be configured to transmit the decrypted first secure network voice communication to a communication modification component. At the communication modification component, the decrypted first secure network voice communication can be randomly-modified to produce a randomly-modified decrypted first secure network voice communication. The randomly-modified decrypted first secure network voice communication can be transferred to the second secure network. The first secure network can employ a first encryption scheme, the second secure network can employ a second encryption scheme, and the first encryption scheme and the second encryption schemes can be different schemes. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Incorporated herein are drawings that constitute a part of the specification and illustrate embodiments of the detailed description. The detailed description will now be described further with reference to the accompanying drawings as follows: 
         FIG. 1  illustrates one embodiment of a communication environment comprising a first secure network and a second secure network; 
         FIG. 2  illustrates one embodiment of a first secure network radio, a first secure network decryptor, a converter, a second secure network encryptor, and a second secure network radio; 
         FIG. 3  illustrates one embodiment of the decryptor comprising a reception component, a decryption component, and a transmission component; 
         FIG. 4  illustrates one embodiment of the decryptor comprising the reception component, the decryption component, the transmission component, and a check component; 
         FIG. 5  illustrates one embodiment of the converter; 
         FIG. 6  illustrates one embodiment of the noise source level modifier comprising a pseudorandom number generator, a controller, a digital potentiometer, and a voltage follower; 
         FIG. 7  illustrates one embodiment of an environment with a first radio and a second radio that communicate with an intermediary hardware unit; 
         FIG. 8  illustrates one embodiment of the converter comprising the reception component, an addition component, and the transmission component; 
         FIG. 9  illustrates one embodiment of the converter comprising the reception component, the addition component, the transmission component, and an identification component; 
         FIG. 10  illustrates one embodiment of the converter comprising the reception component, the addition component, the transmission component, a tamper detection component, and an output component; 
         FIG. 11  illustrates one embodiment of the encryptor comprising the reception component, an encryption component, and the transmission component; 
         FIG. 12  illustrates one embodiment of a system comprising the reception component, the encryption component, the transmission component, a collection component, the decryption component, and a transfer component; 
         FIG. 13  illustrates one embodiment of a system comprising a processor and a computer-readable medium; 
         FIG. 14  illustrates one embodiment of a method comprising three actions; 
         FIG. 15  illustrates one embodiment of a method comprising three actions; 
         FIG. 16  illustrates one embodiment of a method comprising three actions; 
         FIG. 17  illustrates one embodiment of a method comprising four actions; and 
         FIG. 18  illustrates one embodiment of a method comprising three actions. 
     
    
    
     DETAILED DESCRIPTION 
     Instances can occur in wireless communication where a first party wants to give access to a second party to the first party&#39;s network. However, this access is not full access, but partial access. In one example, two military forces from different nations can have a desire to communicate with one another during a joint operation. While the nations may be friendly, for security reasons it may be best to not give full access to each other&#39;s networks. 
     Therefore, an intermediary communications module can be used to facilitate this partial access. In one example, a voice communication from the first party&#39;s network can be decrypted and sent to the intermediary communications module. Noise, such as non-audible white noise, can be added to the voice communication and then the communication can be sent to the second party&#39;s network to be encrypted in accordance with the second party&#39;s network. This noise prevents the second party from using the communication to decipher an encryption scheme of the first network while still allowing the communication to be transferred. This can also protect the first party since the second party cannot use the communication if the second party intercepts the first party&#39;s encrypted version of the communication. 
     The following includes definitions of selected terms employed herein. The definitions include various examples. The examples are not intended to be limiting. 
     “One embodiment”, “an embodiment”, “one example”, “an example”, and so on, indicate that the embodiment(s) or example(s) can include a particular feature, structure, characteristic, property, or element, but that not every embodiment or example necessarily includes that particular feature, structure, characteristic, property, or element. Furthermore, repeated use of the phrase “in one embodiment” may or may not refer to the same embodiment. 
     “Computer-readable medium”, as used herein, refers to a medium that stores signals, instructions and/or data. Examples of a computer-readable medium include, but are not limited to, non-volatile media and volatile media. Non-volatile media may include, for example, optical disks, magnetic disks, and so on. Volatile media may include, for example, semiconductor memories, dynamic memory, and so on. Common forms of a computer-readable medium may include, but are not limited to, a floppy disk, a flexible disk, a hard disk, a magnetic tape, other magnetic medium, other optical medium, a Random Access Memory (RAM), a Read-Only Memory (ROM), a memory chip or card, a memory stick, and other media from which a computer, a processor or other electronic device can read. In one embodiment, the computer-readable medium is a non-transitory computer-readable medium. 
     “Component”, as used herein, includes but is not limited to hardware, firmware, software stored on a computer-readable medium or in execution on a machine, and/or combinations of each to perform a function(s) or an action(s), and/or to cause a function or action from another component, method, and/or system. Component may include a software controlled microprocessor, a discrete component, an analog circuit, a digital circuit, a programmed logic device, a memory device containing instructions, and so on. Where multiple components are described, it may be possible to incorporate the multiple components into one physical component or conversely, where a single component is described, it may be possible to distribute that single component between multiple components. 
     “Software”, as used herein, includes but is not limited to, one or more executable instructions stored on a computer-readable medium that cause a computer, processor, or other electronic device to perform functions, actions and/or behave in a desired manner. The instructions may be embodied in various forms including routines, algorithms, modules, methods, threads, and/or programs, including separate applications or code from dynamically linked libraries. 
       FIG. 1  illustrates one embodiment of a communication environment  100  comprising a first secure network  110  and a second secure network  120 . The networks  110  and  120  can comprise a plurality of radios  110 R and  120 R, respectively. In one embodiment, the first secure network  110  and the second secure network  120  are separate and distinct networks, meaning that they do not share radios with one another. The radios  110 R can communicate with one another according to a first encryption scheme  110 S. Similarly, the radios  120 R can communicate with one another according to a second encryption scheme  120 S that is different from the first encryption scheme  110 S (e.g., the first encryption scheme  110 S can be more complex than the second encryption scheme). 
     However, there can be a desire for the first secure network  110  and the second secure network  120  to communicate with one another. In one embodiment, the networks  110  and  120  can transfer unencrypted communications between one another (e.g., via a direct cable connection). While this can result in successful communication, there can also be drawbacks. 
     Consider the following example that will be used throughout the detailed description. A natural disaster, such as a wild fire, can occur near a decently sized population center. The local community can send their local volunteer fire department (fire department) to help combat the fire. Additionally, the state governor can call-up the state National Guard (Guard) to also help combat the fire. The state National Guard can use the first secure network  110  while the volunteer fire department uses the second secure network  120 . There can be many instances where the Guard and fire department would benefit in communicating with one another, such as to identify where the fire is most intense and in coordinating efforts. 
     One manner of communication can be unencrypted communication. This, however, can have drawbacks. In one example, the fire department can have foreign nationals or uncleared individuals serving as well as the possibility of the unencrypted communication being observed by a non-friendly third party. An undesirable party can obtain the unencrypted communication and use the unencrypted communication to help decipher the senders encryption scheme, such as the first encryption scheme  110 S of the Guard. Since the Guard can use the first encrypted scheme to communicate with other military units (e.g., other state National Guards, a Reserve component, or an Active component), compromising of the first encryption scheme  110 S can have devastating consequences. Therefore, while potentially available, direct unencrypted communication may not be desirable. 
     Additionally, different hardware can be used. In one example, the fire department can use different radios than the Guard. These radios can be relatively similar (e.g., the fire department uses model  123 -A radios and the Guard uses model  123 -B radios), be from different companies (e.g., the fire department uses radios from company ABC while the Guard uses radios from company XYZ), have vastly different functionality (e.g., the fire department uses a minimal feature radio while the Guard uses a high feature radio), etc. Further, the networks  110  and  120  can use different radios internally (e.g. the fire department is a joint team from multiple municipal fire departments with different municipalities employing different radios). 
       FIG. 2  illustrates one embodiment of a first secure network radio  210 , a first secure network decryptor  220 , a converter  230 , a second secure network encryptor  240 , and a second secure network radio  250 . In one embodiment, the decryptor  220  and the encryptor  240  can be stand-alone components (e.g., not radios). In one embodiment, the radio  250  can be one of the radios  120 R of  FIG. 1  and the encryptor  240  can be another one of the radios  120 R of  FIG. 1 . The radio  210  can be one of the radios  110 R of  FIG. 1  and the decryptor  220  can be another one of the radios  110 R of  FIG. 1 . 
     In one example, the radio  210  can be at a distance from a radio that functions as the decryptor  220 . The radio  210  can send a first network encrypted communication  260  to the decryptor  220 , such as sending the communication  260  wirelessly or by way of a hard-wired connection. The decryptor  220  can decrypt the communication  260  to produce a first network decrypted communication  270 . The decryptor  220  can send the communication  270  to the converter  230 , such as sending the communication  270  by way of a first hard wire channel. 
     The converter  230  can add noise to the communication  270 , such as random white noise that is not at a level to be audible to the human ear, to produce a first network noise added decrypted communication  280 . The communication  280  can be sent to the encryptor  240 , such as by way of a second hard wire channel. The encryptor  240  can encrypt the communication  280  in accordance with the second encryption scheme  120 S of  FIG. 1 . This can produce a first network noise added encryption communication  290 . The encryptor  240  can send the communication  290  to the radio  250 , such as sending the communication  290  wirelessly or by way of a hard-wired connection. 
     The radio  250  can therefore receive a communication from the radio  210  despite the radios  210  and  250  being part of different secure networks. Additionally, through the addition of the random noise, the second network is not able to use the communications  280  or  290  to learn the first encryption scheme  110 S of  FIG. 1 . With the hard wire channels, the first secure network  110  of  FIG. 1  and the second secure network  120  of  FIG. 1  can both connect easily so that communications can be shared without compromising network security. 
     In one embodiment, the second network  120  of  FIG. 1  does not use an encryption scheme. However, the first network  110  of  FIG. 1  can still use the encryption scheme  110 S of  FIG. 1 . Since it can still be a security risk for a user of the first network  110  of  FIG. 1  to have unencrypted communications sent while also employing an encryption scheme, the converter  230  can be used to employ the noise. For communications from the second network  120  of  FIG. 1 , the noise can be added when transferred to the first network  110  of  FIG. 1 . 
     With an example scenario, the network  110  of  FIG. 1  has two radios  110 R of  FIG. 1 —Radio  1 -A and Radio  1 -B—and the network  120  of  FIG. 1  has two radios  120 R of  FIG. 1 —Radio  2 -A and Radio  2 -B. Two radios, one from each network  110  and  120 , both of  FIG. 1 , can be collected and connected to the converter  230  to support retransmission (e.g., a separate converter unit or the radios  1 -A and  2 -B have components capable of performing conversion). If Radios  1 -A and  2 -A are selected, the audio out of Radio  1 -A, that is decrypted baseband audio, can be connected to the audio in of Radio  2 -A (e.g., directly connected or connected via a converter unit). The converter  230  can take decrypted baseband audio, modify the decrypted baseband audio, and output the modified baseband audio. The modification an include adding noise (e.g., adding white noise, adding a random signal, adding a wobble tone, or adding a random sub-audio tone) to the decrypted baseband audio or otherwise modifying the decrypted baseband audio. 
       FIG. 3  illustrates one embodiment of the decryptor  220  comprising a reception component  310 , a decryption component  320 , and a transmission component  330 . In one embodiment, the decryptor  220  is part of a radio (e.g. a radio with encryption and/or decryption capabilities). In one embodiment, the decryptor  220  is a stand-alone component (e.g., hard-wired to a physically separate radio). 
     The reception component  310  can be configured to receive an encrypted first secure network voice communication (e.g., the communication  260 ) with an intended destination of the second secure network  120  of  FIG. 1 . The decryption component  320  can be configured to decrypt the encrypted first secure network voice communication with the intended destination of the second secure network into a decrypted first secure network voice communication (e.g., the communication  270 ). The transmission component  330  can be configured to transmit the decrypted first secure network voice communication to a noise addition component (e.g., the converter  230  of  FIG. 2 ). 
     At the noise addition component, random noise can be added and after the random noise is added the decrypted first secure network voice communication is transferred to the second secure network  120  of  FIG. 1 . The noise addition component can transfer the decrypted first secure network voice communication with noise added to the encryptor  240  of  FIG. 2  for encryption in accordance with the second encryption scheme  120 S of  FIG. 1 . 
     While above examples relate to the noise addition component as functioning with two networks, more than two networks can employ the converter. Returning to the fire department/National Guard scenario, a county sheriff can also become involved using communications equipment that functions off a third secure network with a third encryption scheme. The converter  230  of  FIG. 2  can function commonly for the three parties to communicate together or three converters  230  of  FIG. 2  can be employed for different communications among the secure networks (e.g., fire department-National Guard communication, fire department-county sheriff communication, and National Guard-county sheriff communication). In one embodiment, the third secure network can communicate with the first secure network  110  of  FIG. 1 , but not the second secure network  120  of  FIG. 1 . 
     The decrypted first secure network voice communication can be considered a first decrypted first secure network voice communication. The reception component  310  can be configured to receive an encrypted first secure network voice communication with an intended destination of a third secure network. The decryption component is configured to decrypt the encrypted first secure network voice communication with the intended destination of the third secure network into a second decrypted first secure network voice communication. The transmission component  330  can be configured to transmit the second decrypted first secure network voice communication to the noise addition component where random noise is added and after the random noise is added the second decrypted first secure network voice communication is transferred to the third secure network. 
     With this, the decryptor  220  can function as a router. A radio  110 R can produce the communication  260 . This communication  260  can include content as well as directional information communicated in a header. The decryptor  220  can read the header to determine the intended destination of the communication. Based on this, the decryptor  220  can send the communication to the appropriate converter  230  of  FIG. 2 . When a common converter  230  of  FIG. 2  is used, the converter  230  of  FIG. 2 , in addition to modifying the audio stream, can function as the router and process header information (e.g., two communications sent—a non-noised added direction instruction sent from the converter  230  of  FIG. 2  and the noise-added communication). However, aspects can be practiced without header information. 
       FIG. 4  illustrates one embodiment of the decryptor  220  comprising the reception component  310 , the decryption component  320 , the transmission component  330 , and a check component  410 . The check component  410  can be configured to perform a check as to whether the noise addition component has experienced a tampering. This check can be a self-diagnostic tool reviewing an access log, a scanner to see if physical hardware has been modified, a tester (e.g., testing if the noise added is random), etc. The check component  410  can function when the decryptor  220  initially engages with the converter  230  of  FIG. 2  and/or periodically while engaged. 
     In one embodiment, the check can have an outcome that the converter  230  of  FIG. 2  has experienced a tampering. In response to this, the check component can prevent the transmission component from transmitting the decrypted first secure network voice communication to the converter  230  of  FIG. 2 . Additionally or alternatively, an alert can be produced (e.g., a light flashes, a warning ton can be mixed into the audio signal, or a message can be sent to an administrator), such as upon detection of a tamper condition. 
       FIG. 5  illustrates one embodiment of the converter  230 . When push-to-talk (PTT) is selected by a user, an audio in detect circuit  505   a  can allow PTT communication such that the unencrypted communication (e.g., baseband audio) from the first network  110  of  FIG. 1  to be received as a level modifier  510 . The level modifier  510   a  can send the signal to a summing circuit  515 . A set of noise sources  520   a  (one or more noise sources) can provide random noise as noise modifiers  525   a  that in turn also feed to the summing circuit  515   a  (e.g., summing amplifier). The noise modifiers  525   a  can be varied over time and/or multiple sources can be engaged over times in random ways so the randomness is not only in the noise itself, but can also be random over time. The summing circuit  515   a  can produce a modified audio out  530   a  (e.g., the communication  280  of  FIG. 2 ) by summing audio output from the level modifier  510   a  with noise signal outputs from the noise modifiers  525   a . The modified audio out  530   a  can be sent to the second network  120  of  FIG. 1  for encryption. 
     The converter  230  can be multi-directional. In one example,  505   a - 530   a  can be mirrored as  505   b - 530   b  for communication from the second network  120  of  FIG. 1  to the first network  110  of  FIG. 1 . While two networks are discussed, more complex implementations can be practiced, such as the converter  230  facilitating communication to three or more networks or facilitating limited communication among networks (e.g., a primary network communicating with a secondary network and a tertiary network, but not facilitating communication between the secondary network and the tertiary network). In one embodiment, items of the converter  230  can be combined (e.g., a single set of noise modifiers can be used as opposed to two sets  520   a  and  520   b ). 
     In one embodiment, the converter  230  can include tramper resistant features. A tamper detector set  535   a  and  535   b  (e.g., a single tamper detector) can detect that the converter  230  and/or an associated radio has been tampered with such that security may be compromised. A warning tone generator  540  can function to add a warning tone (e.g., human audible tone at predetermined level and/or frequency) to an outgoing communication notifying a user that the converter has been tampered with. The additional warning tone can be input to the summing circuits  515   a  and  515   b.    
     In one embodiment, a set of switches  545   a  and  545   b  can be employed to regulate addition of the warning tone. The switches  545   a  and  545   b  can remain open. In one example, when the tamper detector  535   a  determines tampering has occurred, a warning tone output control  550  (e.g., a controller) can cause the switch  545   a  to close. This closing can cause the warning tone generator  540  to send a tone that arrives at the summing circuit  515   a  for summation. This summation can cause the audio output to have a warning tone. The warning tone can alert a listener or a receiving radio that the converter  230  may have been compromised. In view of this, the receiving network may not elect to encrypt the output with its encryption scheme or continue communicating since the noise added may not be random and therefore may pose a security threat. 
       FIG. 6  illustrates one embodiment of the noise source level modifier  525  comprising a pseudorandom number generator  610 , a controller  620 , a digital potentiometer  630 , and a voltage follower  640 . This noise source level modifier can vary amplitude of the noise for added variance (e.g., noise is added and amplitude of the noise is varied over time). The pseudorandom number generator  610  can generate a pseudorandom number and this number is provided to the controller  620  along with a clock signal. The controller  620  can employ a processor and memory to produce a control I/O signal. The control algorithm of the controller  620  takes the number and uses it to vary the produced control I/O signal. The varied control I/O signal is supplied to the potentiometer  630  and since the control I/O signal is varied, the resistance of the potentiometer is varied. The potentiometer  630  can be controlled by the control I/O signal received to produce a modified level out. The modified level out can be fed to a blocking capacitor (e.g., if appropriate). The output of the blocking capacitor can be put into the non-inverting terminal of the voltage follower  640 . The output of voltage follower  640  is input to the desired summing circuit (e.g., summing circuit  515   a  of  FIG. 5 ). 
     Protections can be put into place so that the output of the voltage follower  640  remains random. In one embodiment, the control algorithm can function with a capping feature to ensure randomness. The control algorithm can be supplied with a maximum value threshold and a minimum value threshold. If the modified level out reaches either the maximum or minimum, then the control algorithm can cause a respective drop or rise so that the potentiometer  630  does not become stuck and an extreme value (and therefore losing randomness). 
       FIG. 7  illustrates one embodiment of an environment  700  with a first radio  710  (e.g., a radio  110 R of  FIG. 1  on the first secure network  110  of  FIG. 1 ) and a second radio  720  (e.g., a radio  120 R of  FIG. 1  on the first secure network  120  of  FIG. 1 ) that communicate with an intermediary hardware unit  730 . The connections between the unit  730  and the radios  710  and  720  can be hardwired, movable physical wires, etc. In one example, with the movable physical wires, the wires can connect with audio ports  710   p  and  720   p  (e.g., one in and one out wire for each port, a single out and multiple in wires, a common wire for in and out, etc.). The unit  730  can comprise the converter  230  and use the ports  710   p  and  720   p  along with the converter  230  to facilitate communication between the radios  710  and  720 . 
       FIG. 8  illustrates one embodiment of the converter  230  comprising the reception component  310 , an addition component  810 , and the transmission component  330 . The reception component  310  can be configured to receive a non-encrypted voice communication (e.g., the communication  270 ) from a first secure radio network (e.g., the first secure network  110  of  FIG. 1 ). The addition component  810  can be configured to add random noise to the non-encrypted voice communication from the first secure radio network such that a first secure radio network-based noise-added non-encrypted voice communication (e.g., the communication  280 ) is produced. The transmission component  330  can be configured to transmit the first secure radio network-based noise-added non-encrypted voice communication to a second secure radio network (e.g., the second secure network  120  of  FIG. 1 ). 
       FIG. 9  illustrates one embodiment of the converter  230  comprising the reception component  310 , the addition component  810 , the transmission component  330 , and an identification component  910 . The identification component  910  can be configured to determine a communication destination between the second secure radio network and a third secure radio network. The transmission component  330  can be configured to transmit the first secure radio network-based noise-added non-encrypted voice communication to the second secure radio network when the determination is that the communication destination is the second secure radio network. Similarly, the transmission component  330  can be configured to transmit the first secure radio network-based noise-added non-encrypted voice communication to the third secure radio network when the determination is that the communication destination is the third secure radio network. 
     The reception component  310 , addition component  810 , and transmission component  330  can do the same for communications from the second secure network to the first secure network as well as other networks (e.g., a third secure network). Additionally, networks can share radios so that a radio is part of more than one network (e.g., the radio being shared between networks supports multiple transmission and/or reception capabilities, such as being capable of storing and processing multiple keys). Returning to the fire example, three networks can be used—the Guard, the Fire Department, and a regular Army unit (Army), such as from a corps of engineers. A specific radio can be configured to communicate on the Army network and the Guard network. When the transmission component  330  transmits the communication  280  to the specific radio there can be header information to know what network the communication is intended for. In response to this, the radio can encrypt accordingly. 
       FIG. 10  illustrates one embodiment of the converter  230  comprising the reception component  310 , the addition component  810 , the transmission component  330 , a tamper detection component  1010 , and an output component  1020 . The tamper detection component  1010  (e.g., the tamper detector set  535   a  of  FIG. 5 ) can be configured to make a determination if the addition component  810  is tampered with such that the random noise is not added to the non-encrypted voice communication from the first secure radio network. The output component  1020  (e.g., the warning tone generator  540  of  FIG. 5 , the set of switched  545   a  and  545   b  of  FIG. 5 , the warning tone output control  550  of  FIG. 5 , or a combination thereof) can be configured to output an indicator when the determination is that tampering has occurred. 
     In one example, the indicator is a light that flashes on an outside of housing of the converter  230 . With this, a user can be alerted that the converter  230  may have experienced a tampering. However, the user may want to still use the converter  230 . For example, in the fire scenario, the need for emergency rescue may be so great that it outweighs security concerns. Using a light can alert parties that security may be comprised and therefore the parties may want to be mindful of what is said since communication may be compromised. Using the light as a tamper indicator can allow the communication to continue unchanged (as opposed to when a human-audible tone is added). 
       FIG. 11  illustrates one embodiment of the encryptor  240  comprising the reception component  310 , an encryption component  1110 , and the transmission component  330 . The reception component  310  can be configured to receive a random noise-added first network-based non-encrypted voice communication (e.g., the communication  280 ) by way of a non-encrypted communication channel (e.g., hardwire channel). The encryption component  1110  can be configured to encrypt, according to the second network encryption scheme  120 S of  FIG. 1 , the random noise-added first secure network-based non-encrypted voice communication into an encrypted first secure network voice communication (e.g., the communication  290 ). The transmission component  330  can be configured to transmit the encrypted first secure network voice communication along the second secure network  110  of  FIG. 1 . 
     The encryptor  240  can be part of a radio  110 R and/or  120 R of  FIG. 1 , so messages, such as voice communications, can transfer both from the first network  110  of  FIG. 1  to the second network  120  of  FIG. 1  and from the second network  120  of  FIG. 1  to the first network  110  of  FIG. 1 . Similarly, the encryptor  240  can receive messages from multiple secure networks. These multiple messages can be received from, and have noise added by, a single noise addition component (e.g., the converter  230  of  FIG. 2 ). 
     Conversely, these multiple messages can be received from different noise addition components (e.g., different converters). In one example, a single radio can connect with multiple converters. This can allow the single radio that functions on a first secure radio network to communicate with a second secure radio network by way of a first converter and to communicate with a third secure radio network by way of a second converter distinct and separate from the first converter. This can allow the first secure radio network to communicate with the second and third secure radio networks. This can take place with or without the second secure radio network and the third secure radio network directly communicating with one another (e.g., the first secure radio network can function as a pass through to facilitate communication between the second secure radio network and the third secure radio network when direct communication is unavailable). 
     In one embodiment, the encryptor  240  can employ the check component  410  of  FIG. 4  to perform a check as to whether a source of the random noise-added second secure network-based non-encrypted voice communication has experienced tampering. In one example, a message can be received and the encryptor  240  can determine if tampering has occurred. If tampering has occurred, then the message can be deleted, be sent along without encryption, etc. If tampering has not occurred, the encryptor  240  can read an intended destination (e.g., a destination radio of the receiving network), subject the message to the encryptor&#39;s encryption scheme, and send the message to the intended destination (e.g., directly or by way of relay). 
       FIG. 12  illustrates one embodiment of a system  1200  comprising the reception component  310 , the encryption component  1110 , the transmission component  330 , a collection component  1210 , the decryption component  320 , and a transfer component  1220 . The system  1200  can function as a radio with the encryptor  240  of  FIG. 2  (e.g., the reception component  310 , the encryption component  1110 , and the transmission component  330 ) and the decryptor  220  of  FIG. 2  (e.g., the collection component  1210 , the decryption component  320 , and the transfer component  1220 ). This allows a single radio to be able to decrypt communications that are leaving the radio&#39;s network and encrypt communications that are entering the radio&#39;s network. 
     The collection component  1210  can be configured to collect a network outgoing communication that originates within a secure network of the system  1200  when functioning as a radio. The decryptor component  320  can decrypt the network outgoing communication. The transfer component  320  can transfer, by way of a non-encrypted communication channel, the decrypted communication to the converter  230  of  FIG. 2 . 
       FIG. 13  illustrates one embodiment of a system  1300  comprising a processor  1310  (e.g., a general purpose processor, a processor specifically designed for performing a functionality disclosed herein, etc.) and a computer-readable medium  1320  (e.g., non-transitory computer-readable medium). In one embodiment, the computer-readable medium  1320  is communicatively coupled to the processor  1310  and stores a command set executable by the processor  1310  to facilitate operation of at least one component disclosed herein (e.g., the decryption component  320  of  FIG. 3 ). In one embodiment, at least one component disclosed herein (e.g., the transmission component  330  of  FIG. 3 ) can be implemented, at least in part, by way of non-software, such as implemented as hardware by way of the system  1300 . In one embodiment, the computer-readable medium  1320  is configured to store processor-executable instructions that when executed by the processor  1310 , cause the processor  1310  to perform a method disclosed herein (e.g., the methods  1400 - 1800  addressed below). 
       FIG. 14  illustrates one embodiment of a method  1400  comprising three actions  1410 - 1430 . The method  1400  can, in one example, be performed by a radio  110 R of  FIG. 1  by way of the decryptor  220  of  FIG. 2 . At  1410 , an encrypted communication can be received. At  1420 , the received encrypted communication can be decrypted. At  1430 , the decrypted communication can be transferred to the converter  230  of  FIG. 2 . 
       FIG. 15  illustrates one embodiment of a method  1500  comprising three actions  1510 - 1530 . The method  1500  can, in one example, be performed by the converter  230  of  FIG. 2 . There can be, at  1510  receiving an unencrypted communication from a radio  110 R of  FIG. 1  of the first secure network  110  of  FIG. 1 . At  1520 , random noise (e.g., white noise) can be added to the unencrypted communication. At  1530 , the unencrypted communication with added random noise can be transmitted to the second secure network  120  of  FIG. 1 . 
       FIG. 16  illustrates one embodiment of a method  1600  comprising three actions  1610 - 1630 . The method  1600  can, in one example, be performed by a radio  110 R of  FIG. 1  by way of the encryptor  240  of  FIG. 2 . At  1610 , a decrypted white noise added communication can be received from the converter  230  of  FIG. 2 . At  1620 , the received communication can be encrypted along with the white noise. At  1630 , the encrypted communication can be transferred to a destination radio. The destination radio can be part of the same secure network as the radio performing the method  1600 . 
       FIG. 17  illustrates one embodiment of a method  1700  comprising four actions  1710 - 1730 . The method  1700  can, in one example, be performed by the converter  230  of  FIG. 2 . At  1710 , a communication situation can be identified, such as receiving a communication designated for white noise addition (e.g., receive the communication along a dedicated hardwire channel). At  1720 , a check can be performed to determine if the converter  230  of  FIG. 2  has experienced a tampering (e.g., physical tampering to the converter  230  of  FIG. 2  or software tampering/a software tampering attack occurs to the converter  230  of  FIG. 2 ). If so, then the situation can be rejected at  1730  or alternative arrangements made (e.g., the communication is moved forward, but with a notification of the tampering such as an addition of a warning tone). If tampering is not detected, then the communication situation can proceed as normal. 
       FIG. 18  illustrates one embodiment of a method  1800  comprising three actions  1810 - 1830 . The method  1800  can, in one example, be performed by the converter  230  of  FIG. 2 . At  1810 , a voice communication can be received. At  1820 , the voice communication can be digitized. At  1830 , subaudible tones can be overlaid on the digitized audio. These subaudible tones can be the noise or can be the notification of the tampering. 
     While the example of the military and fire department is used throughout the detailed description, one should appreciate that this technology can have application in a wide variety of fields. One example includes allowing two companies to communicate with one another, including non-audio communication, by adding random values to a communication. Another example includes allowing two military forces from different nations to communicate with one another. 
     While the methods disclosed herein are shown and described as a series of blocks, it is to be appreciated by one of ordinary skill in the art that the methods are not restricted by the order of the blocks, as some blocks can take place in different orders. Similarly, a block can operate concurrently with at least one other block.