Source: http://www.google.ca/patents/US9754099
Timestamp: 2018-01-20 13:31:26
Document Index: 390721221

Matched Legal Cases: ['application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 2010292318', 'Application No. 2010292318', 'Application No. 2011253604', 'Application No. 2013203800', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 201210101598', 'Application No. 20120136876', 'Application No. 201210101598', 'Application No. 201080039625', 'Application No. 201080039625', 'Application No. 201210136878', 'Application No. 201210136876', 'Application No. 20121036876', 'Application No. 2012101598', 'Application No. 201080039625', 'Application No. 201210136878', 'Application No. 10194370', 'Application No. 07', 'Application No. 10194370', 'Application No. 07', 'Application No. 09', 'Application No. 4519', 'Application No. 2012', 'Application No. 2010', 'Application No. 2013', 'Application No. 2013', 'Application No. 2010', 'Application No. 2010', 'Application No. 2011', 'Application No. 10', 'Application No. 10', 'Application No. 2007268239', 'Application No. 10194377', 'Application No. 10', 'Application No. 2009', 'Application No. 200910222182']

Patent US9754099 - Accessory authentication for electronic devices - Google Patents
Improved techniques to control utilization of accessory devices with electronic devices are disclosed. The improved techniques can use cryptographic approaches to authenticate electronic devices, namely, electronic devices that interconnect and communicate with one another. One aspect pertains to techniques...http://www.google.ca/patents/US9754099?utm_source=gb-gplus-sharePatent US9754099 - Accessory authentication for electronic devices
Publication number US9754099 B2
Application number US 14/979,456
Filing date 27 Dec 2015
Also published as CA2591164A1, CA2591164C, CN101099157A, CN101099157B, CN101699458A, CN101699458B, DE202005021674U1, EP1834273A1, EP1834273B1, US7823214, US8161567, US8763079, US9223958, US20060156415, US20090083834, US20110061113, US20150082049, US20160110536, WO2006073702A1
Publication number 14979456, 979456, US 9754099 B2, US 9754099B2, US-B2-9754099, US9754099 B2, US9754099B2
Inventors Jonathan J. Rubinstein, Anthony M. Fadell, Jesse Lee Dorogusker, Mitchell Adler, John Wesley Archibald
Patent Citations (568), Non-Patent Citations (131), Classifications (6), Legal Events (1)
US 9754099 B2
an authentication controller coupled to execute an authentication procedure with an external electronic device coupled to the electronic device; and
a boost converter coupled to receive a first power supply voltage and further coupled to be enabled by the authentication controller, where when the boost converter is enabled by the authentication controller, the boost converter boosts the first power supply voltage to a second power supply voltage and provides the second power supply voltage, the second power supply voltage higher than the first power supply voltage, and where when the boost converter is not enabled by the authentication controller, the boost converter does not provide the second power supply voltage.
an authentication controller coupled to receive a first power supply voltage and data from the first port and further coupled to be enabled by the authentication controller, the authentication controller to conduct an authentication procedure with an external electronic device coupled to the first port; and
a boost converter coupled to receive the first power supply voltage from the first port, where when the boost converter is enabled by the authentication controller, the boost converter boosts the first power supply voltage to a second power supply voltage and provides the second power supply voltage, the second power supply voltage higher than the first power supply voltage, and wherein when the boost converter is not enabled by the authentication controller, the boost converter does not provide the second power supply voltage.
an authentication controller coupled to data lines to conduct an authentication procedure, the authentication having an enable output to provide an enable signal after a successful completion of the authentication procedure and to not provide the enable signal after an unsuccessful completion of the authentication procedure; and
a boost converter to receive a first power supply voltage and to boost the first power supply voltage to a second power supply voltage and to provide the second power supply voltage when the enable signal is received from the authentication controller and to provide the first power supply voltage when the enable signal is not received from the authentication controller.
This application, is a continuation of U.S. patent application Ser. No. 14/312,672, filed Jun. 23, 2014, which is a continuation of Ser. No. 12/328,368, filed Dec. 4, 2008, now U.S. Pat. No. 8,763,079, which is a divisional of U.S. patent application Ser. No. 11/051,499, filed Feb. 3, 2005, entitled “ACCESSORY AUTHENTICATION FOR ELECTRONIC DEVICES,” now U.S. Pat. No. 7,823,214, which claims the benefit of U.S. provisional patent application No. 60/642,340, filed Jan. 7, 2005, entitled “ACCESSORY AUTHENTICATION FOR ELECTRONIC DEVICES,” which are incorporated by reference.
This application is also related to: (i) U.S. patent application Ser. No. 11/051,441, filed Feb. 3, 2005, entitled “SMALL MEMORY FOOTPRINT FAST ELLIPTIC ENCRYPTION,” which is hereby incorporated herein by reference; (ii) U.S. Provisional Patent Application No. 60/642,276, filed Jan. 7, 2005, entitled “PORTABLE MEDIA DEVICE AND IMPROVED PLAYLIST PROCESSING ON MEDIA DEVICES,” which is hereby incorporated herein by reference; (iii) U.S. Provisional Patent Application No. 60/642,334, filed Jan. 7, 2005, entitled “MEDIA MANAGEMENT FOR GROUPS OF MEDIA ITEMS,” which is hereby incorporated herein by reference; (iv) U.S. patent application Ser. No. 11/031,547, filed Jan. 7, 2005, entitled “PORTABLE POWER SOURCE TO PROVIDE POWER TO AN ELECTRONIC DEVICE VIA AN INTERFACE,” which is hereby incorporated herein by reference; (v) U.S. patent application Ser. No. 11/031,288, filed Jan. 7, 2005, entitled “METHOD AND SYSTEM FOR DISCOVERING A POWER SOURCE ON A PERIPHERAL BUS,” which is hereby incorporated herein by reference; (vi) U.S. patent application Ser. No. 29/220,463, filed Jan. 7, 2005, entitled “CONNECTOR SYSTEM,” which is hereby incorporated herein by reference; (vii) U.S. patent application Ser. No. 29/220,892, filed Jan. 7, 2005, entitled “CONNECTOR INTERFACE SYSTEM FOR MULTI-COMMUNICATION DEVICE,” which is hereby incorporated herein by reference.
A media player typically includes one or more connectors or ports that can be used to interface to the media player. For example, the connector or port can enable the media player to couple to a host computer, be inserted into a docking system, or receive an accessory device.
There are today many different types of accessory devices that can interconnect to the media player. For example, a remote control can be connected to the connector or port to allow the user to remotely control the media player. As another example, an automobile can include a connector and the media player can be inserted onto the connector such that an automobile media system can interact with the media player, thereby allowing the media content on the media player to be played within the automobile.
FIG. 3 is a block diagram of an authentication device 300 according to one embodiment of the invention. In this embodiment, the authentication device 300 not only contains circuitry for authentication of itself or an accessory device coupled thereto, but also additional circuitry for providing other functions by the authentication device 300. In particular, the authentication device 300 is designed to couple to an electronic device as well as to an accessory device. As shown in FIG. 3, the authentication device 300 includes a controller 302 that includes memory 304. As an example, the controller 302 can pertain to the authentication controller 200 illustrated in FIG. 2A. The controller 302 can couple to a port connector 306 which in turn can connect to the electronic device. The port connector 306 can provide power from the electronic device to the controller 302 and a boost converter 308 over a power line (PIN). Additionally, the controller 302 can communicate with the electronic device through the port connector 306 by way of transmit and receive communication lines (TX, RX). Through such communication, the electronic device can determine whether the authentication device 300 is authorized for use with the electronic device. If the electronic device determines that the authentication device 300 is authorized, then the controller 302 can enable a boost converter 308 using an enable signal (EN). Once enabled, the boost converter 308, which receives an input voltage on the power line (PIN) from the port connector 306, can output a boosted output voltage on a power line (POUT) to a USB connector 310. For example, the input voltage can be 3.3 Volts and the boosted output voltage can be 5.0 Volts. The USB connector 310 also receives a pair of differential data lines (D+, D−) from the port connector 306 to allow data transmission between the electronic device and an accessory device that can be coupled to the USB connector 310.
The accessory device process 900 begins with a decision 902 that determines whether the accessory device is connected to the host device. When the decision 902 determines that the accessory device is not connected to the host device, the accessory device process 900 awaits such a connection. In other words, the accessory device process 900 is effectively invoked when the accessory device is connected to the host device. In one embodiment, the accessory device process 900 is invoked once it is determined that an accessory device has just recently connected to the host device. However, in other embodiments, the authentication process can be performed later (e.g., deferred).
The host computer 1102 also includes a communication module 1114 that couples to a corresponding communication module 1116 within the media player 1104. A connection or link 1118 removably couples the communication modules 1114 and 1116. In one embodiment, the connection or link 1118 is a cable that provides a data bus, such as a FIREWIRE® bus or USB bus, which is well known in the art. In another embodiment, the connection or link 1118 is a wireless channel or connection through a wireless network. Hence, depending on implementation, the communication modules 1114 and 1116 may communicate in a wired or wireless manner.
The above discussion makes reference to random number used with cryptographic approaches to authenticate an accessory device or a host device. The cryptographic approaches discussed above can make use of random numbers, public-private key pairs and authentication algorithms. The random numbers can also be referred to as random digests. The public-private key pairs and authentication algorithms can utilize public-key cryptographic systems, such as the well known RSA algorithm or an Elliptic Curve Cryptography (ECC) algorithm. It may be advantageous to use an ECC algorithm that offers reduced memory consumption with relatively smaller keys (e.g., 160 bits) as compared to larger keys (e.g., 1024 bits) as is typical for RSA implementations. An example of a reduced memory ECC algorithm is described in the related U.S. patent application Ser. No. 11/051,441, filed Feb. 3, 2005, entitled “SMALL MEMORY FOOTPRINT FAST ELLIPTIC ENCRYPTION,” which has been incorporated herein by reference.
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International Classification G06F21/60, G06F21/44
Cooperative Classification G06F2221/2129, G06F21/44, G06F21/602, G06F21/445
4 Aug 2017 FEPP