A METHOD AND SYSTEM FOR MANAGING PROPERTY

Abstract: A method and a system of managing property for managing property, such as an article, apparatus, system or information, which system comprises a database (DB) on which there is information saved relating to the property. In the method, an unambiguous identifier individualizing the object is created based on the information attached to the object; the identifier is saved to a database and the identifier is entered in the database as certified after fulfilment of a predetermined condition. According to the invention, before saving the identifier to the database the identifier is signed with a certified signing key and the data of the signatory are attached to the signed identifier.

Description: A METHOD AND A SYSTEM FOR MANAGING PROPERTY SCOPE OF THE INVENTION The present invention relates to telecommunication. In particular, the invention relates to a method and a system for managing property, such as an article, apparatus, system or information, in which method an unambiguous identifier individualizing the object is created based on the information attached to the object; the identifier is saved to a database and the identifier is entered in the database as certified after fulfilment of a predetermined condition. BACKGROUND OF THE INVENTION Several devices or vehicles, such as mobile stations or cars, are equipped with a serial number that helps to identify the object concerned. The serial number is marked or attached in such a way that it is impossible to remove or change unnoticed. The serial number makes it possible to make sure, e.g. of the place of manufacture or the date of manufacture. Insurance companies or other corresponding entities may keep a record of different devices or vehicles marked by the customer. The term "security marking" is often used in this connection. The indi- vidualized object is often provided with a certain marking, or some separate component is inserted in the object that is very hard to detach and that helps to identify the object. In this way, in losses or thefts, it is possible to identify the real owner of the prop- erty, if the stolen article is found. There are on the market services in which against a small annual fee, the company providing the service pays the client ' s deductible regarding the stolen article to the insurance company. This kind of solution requires that the article has been insured and that the article has been marked as instructed by the company, or that there is an identification part defined by the company inserted in the object. One of the most important questions concerning the Internet is its safety. The objective is to transmit sensitive information via the Internet completely safely and protected. One of the tools in achieving the aforementioned goal is the public key infrastructure. The system is based on the idea that for encryption and decoding separate keys are used that are mathematically depending on one another in such a way that a piece of information encrypted with one of them may only be decoded using the other. One of the keys is so-called secret key and the other public key. To enable the encryption, the public key may be freely distributed to anyone needing the key. The user may create for his or her own use separate keys for signature or encryption. The effective use of asymmetric encryption methods requires a dependable distribution of public keys. The users of the keys have to make sure of the fact that the public keys to be distributed really belong to the parties to whom they are said to belong. In this connection, the word "public key infrastructure" is often used (PKI, Public Key Infrastructure). The activities of the public key infrastructure substantially include the trusted third parties (TTP, Trusted Third Party) and the certificate authorities (CA, Certificate Authority) . The trusted third party means, e.g. a secu- rity authority or an entity authorized by it on whom the users depend and who offers services connected with the security. The trusted third party may also be understood as a standard concept including, e.g. certificate authorities, certification and registering parties. The certificate authority or a certification party is an authority who creates and signs the certificates. It may also act as the creator of the keys. Basic services of the public key infrastructure cover, e.g. the creation of keys, the registering of the user, the certification of a public key, the publishing of public keys and certificates and the updating and publishing of revocation lists. The problem at the moment is the fact of how to easily, safely and with certainty register and show that a certain property belongs to a certain person or entity. OBJECTIVE OF THE INVENTION The objective of the present invention is to eliminate the problems referred to above or at least significantly to alleviate them. One specific objec- tive of the invention is to disclose a new type of method and system that make it possible to easily and safely register, e.g. information concerning a property. As for the features characteristic of the in- vention, reference is made to them in the claims. BRIEF DESCRIPTION OF THE INVENTION The invention relates to a method for managing property, such as an article, apparatus, system or information. In the method, an unambiguous identifier individualizing the object is created based on the information attached to the object. The identifier is understood to mean, e.g. a serial number or some other individualizing identifier. The identifier is saved to a database and it is entered in the database as certified after fulfilment of a predetermined condition. According to the invention, before saving the identifier to the database the identifier is signed with a certified signing key and the data of the sig- natory are attached to the signed identifier. The signed identifier may be transmitted to the database, e.g. via an arranged telecommunication connection. For this purpose, it is possible to encrypt the signed identifier with the recipient's public key. The recipient may decode the encryption with his or her own private key. It is possible to check the validity of the signing key of the signatory. If the key is not valid, then the identifier is provided with a notification of an expired key. Further the identifier may be entered as certified, if the signing key is valid. When creating the signing and/or encryption key of the signatory and the pair of public keys, the keys may be certified with a certificate issued by the trusted third party. Because of the certification, it is possible to make sure of the fact that the keys belong to the entity they are said to belong to. The identifier in the database and/or the details attached to the identifier may be signed with the signing key of the trusted third party. This guarantees the fact that the signed information cannot be altered unnoticed. It is possible to check from the database the signature connected with the identifier or the data of the signatory in order to find out the owner of the property. The identifier and the data of the signatory connected with the identifier may be eliminated from the database. This may be done, e.g. in a situation where the owner who has registered the property in his or her name no longer is the owner of the property in question. It is possible to transmit signed and/or encrypted information between the signatory and the database via the telecommunication connection. In an embodiment of the invention, a mobile station is used for signing and/or encryption of infor- mation or decoding. The system in accordance with the invention comprises a database which contains details of the property stored on it. In addition, the system comprises signing equipment for signing the identifier with the certified signing key and a modifier for attaching the data of the signatory to the signed identi- fier. In an embodiment of the invention, the system comprises a first checker for checking the validity of the signing key of the signatory. In an embodiment of the invention, the system comprises a known third party. In an embodiment of the invention, the system comprises a second checker for checking the signature connected with the identifier from the database. In an embodiment of the invention, the system comprises a mobile station that is used for the signing of the information and/or the encryption or decoding of the information. In an embodiment of the invention, the system comprises a telecommunication connection along which the signed and/or encrypted information is transmitted. Thanks to the present invention, the management of property may be arranged in such a way that the owner of the property may with certainty point out his or her property and safely to transmit ownership related information to the entity providing the property management service. Further the invention provides the advantage that it enables one to clarify the owership, e.g. when the property is on for sale. BRIEF DESCRIPTION OF THE DRAWINGS In the following section, the invention will be described in detail with reference to the examples of its embodiments, in which Fig. 1 represents one embodiment of the system in accordance with the invention, and Fig. 2 is a flow chart illustrating one ad- vantageous mode of functioning of the invention. DETAILED DESCRIPTION OF THE INVENTION The system as described in Fig. 1 comprises a mobile station ME, a telecommunication network WN, a trusted third party TTP and a database DB . The mobile station ME and the trusted third party TTP are connected to the telecommunication network WN, which is preferably a mobile communication network. In conjunc- tion with the trusted third party TTP there is a database DB on which there is information saved relating to the property. The tasks of the trusted third party TTP may include the creation of signing and/or encryption keys, registration of the user, certification of a public key, publication of public keys and certificates as well as updating and publication of revocation lists of certificates. The mobile station ME comprises signing equipment 1 for signing the identifier with the certi- fied signing key. The identifier means preferably a serial number attached to a device. The certified signing key means that the trusted third party TTP has made sure of the fact that the user of the key has the private key corresponding to the public key. The sign- ing key 1 is preferably a program block. In addition, the mobile station ME may be provided with a redundant telecommunication interface in which the connection has been implemented by the Bluetooth technique, IrDa or an inductive connection. In the system as described in Fig. 1, the trusted third party comprises a modifier 2 which is used to attach the data of the signatory to the signed identifier. The first checker 3 is used to check the validity of the signing key of the signatory. The sec- ond checker 4 is used to check the signature associated with the identifier from the database DB. The modifier 2, first checker 3 and second checker 4 are advantageously used to mean a program block. In an embodiment as described in Fig. 1, the user wishes to list a valuable camera of his/her prop- erty. Before listing, the user has to make a service contract, e.g. with a service operator offering property management services. The activities of the service operator may be included in the activities of the trusted third party. The user gets registered and gives the required information about himself/herself which include, e.g. name, address, telephone number, date of birth etc. In conjunction with the registering the service operator may create the necessary keys for the user. For listing the property, each item to be listed has to be provided with an unambiguous identifier. The unambiguous identifier means that no other apparatus has got the same identifier. The apparatus of this example is a camera. To identify a camera it is enough to attach to its body a serial number. In this example the service operator creates the necessary keys. The user registers his or her property over the mobile phone. The keys that have been created for the registering have to be saved on the mobile phone or on a subscriber identity module (SIM, Subscriber Identity Module) inserted in it before listing the apparatuses or items. The user checks the serial number of his or her camera and creates a message with his or her mobile phone that comprises at least the aforementioned serial number. In order that the unique identifier of the apparatus would be authentic and unchanged, it may also be retrieved using another telecommunication connection, such as the Bluetooth, IrDa, inductive connection or the Internet. In that case, the identifier is received directly by the application of a mobile station or another equivalent terminal device to be used when registering or changing ownership. This identifier may be, in addition to the serial number or some other identifier of the property to be registered, e.g. a unique number of a Bluetooth circuit or an unchanged IP number or a combination of these. An identifier of the terminal device itself may also come into question, in which case it is retrieved using the internal buses of terminal ' s own. The user signs the serial number or the iden- tifier with his or her private signing key and sends the message to the service operator. It is also possible to encrypt the message communication between the user and the service operator. In such a case, e.g. the public key method is used. The user encrypts the message with the public key of the service operator and sends the encrypted message. When using the mobile station as the registration terminal it is advantageous to use in registration the registration form delivered to the mobile station the information part in- eluding variable information of which is sent to the database service preferably in a short message of a fixed form, signed and possibly encrypted (SMS, Short Message Service) . The service operator may check the validity of the user's key when receiving the signed message. The service operator signs the received message with his or her private signing key. This is to make sure that the signed information cannot be altered unnoticed. The information signed by the service operator is saved, e.g. to a database specially arranged for this purpose. When the unique identifier has been registered in the database DB, the database or the trusted third party sends to the holder of the signing key a signed acknowledgement message based on which the owner may discover that the registration has taken place. In addition, the registration message may be directly sent to the device to be registered such as the mobile station MS, in which case it is capable of identifying its owner itself based on the private key of the terminal device, and only after this it gets activated or allows only a restricted use of right. In conjunction with the registering, the owner of the property to be registered may, in addition, place restrictions of use on the device, such as the identifiers of other allowed users or certificates, and this information may be attached also to the acknowledgement message of the registration. By means of the aforementioned measure, the user may in any coverage area of the mobile phone and any time give information regarding his or her prop- erty safely and with absolute certainty to a trusted third party who in this example also acts as the service operator. In an embodiment of Fig. 1, it is wished to make sure of the owner of a certain property. In this example, the property is a valuable camera. People may wish to find out the former owner of the property, e.g. when they intend to buy a precious article or apparatus second hand. The new user buying the camera checks the se- rial number in the body of the camera and creates with his or her mobile phone an interrogation message that contains at least the aforementioned serial number. The user signs the interrogation message with his or her private signing key and sends the message to the service operator. The service operator checks and identifies the message based on the sender's signing key. The service operator retrieves from the database the serial number mentioned in the interrogation message. Since the information in the database has been signed with the private signing key of the service operator, the user may use his or her mobile phone to make sure of the fact that the sender of the new mes- sage really is the person he or she is claiming to be, i.e. the service operator. If the serial number is found in the database, then the response to the interrogation message contains, e.g. the ownership details attached to the serial number. If the personal data of the person selling the camera are the same as the data received along with the message, the bargain may be made safely. When selling the camera the previous owner may cancel his or her ownership after the check- ing and send to the trusted third party a message informing about the change of ownership. After this measure the camera may be registered in the name of the new owner . Fig. 2 is an advantageous flow chart repre- senting the function of the method in accordance with the invention. The identifier to be signed is defined as shown by block 20. The identifier is herein used to mean an identifier which individualizes some of the signatory's property. The identifier is, e.g. a serial number permanently fixed in the body of an apparatus. The identifier is signed with the signing key of the signatory, block 21. It is assumed in this example that the client signing the identifier has made some kind of service contract with the service operator. The service operator is advantageously used to mean a trusted third party. When making the contract the trusted third part creates the signing keys for the client and possibly also the public and private key. The client may be given the public key of the trusted third party, if it is necessary to encrypt the message communication between the client and the trusted third party. As shown by block 22, the identifier signed by the client is transmitted to the recipient, which in this example is the trusted third party. In this example, the trusted third party also acts as some kind of service operator. It is possible to encrypt the communication between the client and the service operator. If the encryption is necessary, the client encrypts the message to be sent with the public key of the trusted third party. The trusted third party opens the encrypted message with his or her own private key. As shown by block 23, the trusted third party checks the validity of the signing key of the client. If the key is not valid, a notification informing about the expired key is attached to the received identifier. If the key is valid, the identifier is entered as certified. To the signed identifier, information defined in the service contract is attached, block 24. The information may include, e.g. a name, address etc. The trusted third party certifies the in- formation by signing it with his or her own private signing key, block 25. The information certified by the trusted third party is saved to the database, block 26. In one embodiment, the device to be regis- tered may be a device or a piece of software designed for the restriction of a certain kind of use. In that case, by the registration it is intended to prevent or restrict the use in such a way that the device may only be used for a certain limited period or up to a certain amount, or within a service area beforehand determined and to be checked based on the geographical information delivered, e.g. by the GPS positioning unit. An example of this could be, e.g. a rental car or a vehicle given for a test drive which is equipped with a computer on which there is a certain region set within which the vehicle may be tested for a certain period or distance. In addition, the possible return route to the place of delivery in the presence of certain persons could be restricted. These restrictions of use may only be changed by an acknowledgement message of a registering authority or a registration database service and/or by an (signed) acknowledgement message of the previous owner. For this purpose, in the information systems of property there have to be the certificates of the entities in question or means and a telecommunication connection for checking the certificates from an external, trusted database. If it is wished to prevent the misuse of the database, e.g. for the unauthorized use of ownership related information, then the person wishing to get registered may in a signed message sent by him or her inform the authorities of the visibility of the information or declare the information public. If the property is stolen, database queries may be allowed, which enables one to check the ownership information of the found device. If the marked property is capable of establishing a telecommunication connection with the database service or the terminal device or mobile station of the owner, then, e.g. in thefts it is possible, e.g. based on the IP address, to send directly to the device a message signed by the owner and/or the registration service that informs about the locking. For this reason, it is advantageous to use an IP address at least as a part of the identifier to be registered. As for a property comprising a Bluetooth con- nection or some other wireless connection, the checking could be implemented by means of checking points placed at airports or railway stations or along the streets or roads. This could be a way of finding out the location of a stolen property and to send a noti- fication thereof to the authorities. As for devices including positioning circuits, the geographical information of the stolen device may be transmitted for tracking via a connection. The invention is not restricted merely to the examples of its embodiments, instead many variations are possible within the scope of the inventive idea defined by the claims.

Claims: CLAIMS 1. A method of managing property for managing property, such as an article, apparatus, system or information, in which method: an unambiguous identifier individualizing the object is created based on the information attached to the object; the identifier is saved to a database; and the identifier is entered as certified after ful- filment of a predetermined condition, chara c t e r i s ed in that before saving the identifier to the database the method further comprises the steps of: signing the identifier with a certified signing key; and attaching the data of the signatory to the signed identifier. 2. A method as defined in claim 1, char a c t e r i s ed in that the method further comprises the steps of: encrypting the signed identifier with the signatory's private key; and decoding the encryption with the signatory's public key . 3. A method as defined in claim 1 or 2, charac t e ri sed in that the validity of the signing key of the signatory is checked, and if the key is not valid, then a notification informing about the expired key is attached to the identifier 4. A method as defined in any one of the preceding claims 1 - 3, charac t er i s ed in that the identifier is entered as certified, if the signing key is valid. 5. A method as defined in any one of the preceding claims 1 - 4, charac t e ri s ed in that when creating the signing key/encryption key and the pair of public keys the keys are certified with a certificate of the trusted third party. 6. A method as defined in any one of the preceding claims 1 - 5, c ha ra c t e r i s ed in that the identifier and the data attached to the identifier are signed with the signing key of the trusted third party. 7. A method as defined in any one of the preceding claims 1 - 6, cha ra c t e ri s e d in that the signature connected with the identifier is checked in order to find out the owner of the property. 8. A method as defined in any one of the preceding claims 1 - 7, cha ra c t e r i s e d in that the identifier and the data of the signatory connected with the identifier are eliminated from the database. 9. A method as defined in any one of the preceding claims 1 - 8, charac t eri sed in that signed and/or encrypted information is being transmitted along the telecommunication connection. 10. A method as defined in any one of the preceding claims, 1 - 9, c hara c t eri s ed in that a mobile station is used for the signing and/or the encryption or decoding of the information. 11. A method as defined in any one of the preceding claims 1 - 10, chara c t er i s ed in that the identifier comprises a serial number. 12. A method as defined in any one of the preceding claims 1 - 11, chara c t e ri sed in that a certification message is sent to the holder of the aforementioned signing key after the identifier has been saved to the database. 13. A system of managing property for managing property, such as an article, apparatus, system or information, which system comprises: a database (DB) on which there is information saved relating to the property, c h a r a c t e r i s e d in that the system comprises : a means for signing (1) for signing the identifier with a certified signing key; and a means for attaching (2) for attaching the data of the signatory to the signed identifier. 14. A system as defined in claim 11, char ac t er i s ed in that the system comprises a first checker (3) for checking the validity of the signing key of the signatory. 15. A system as defined in claim 11 or 12, charac t e r i s e d in that the system comprises a trusted third party (TTP) . 16. A system as defined in any one of the preceding claims 11 - 13, cha ra c t e r i s ed in that the system comprises a second checker (4) for checking the signature connected with the identifier from the database (DB) . 17. A system as defined in any one of the preceding claims 11 - 14, chara c t e ri s ed in that the system comprises a mobile station (ME) which is used to sign the data and/or encrypt or decode the data. 18. A system as defined in any one of the preceding claims 11 - 15, chara c t e r i s ed in that the system comprises a telecommunication connection (WN) along which the signed and/or encrypted information is being transmitted.

Inventors: VATANEN HARRI, VATANEN, HARRI
Applicants: SONERA SMARTTRUST OY, VATANEN HARRI, VATANEN, HARRI
Application year: 2000
Main classification: G06F1
IPC codes: G06F1, G06F21