# US 10,321,314 B2 · Communication device, communication method, and communication system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,321,314 B2 - Document ID: US10321314B2 - Status: Granted - Kind: B2 - Application number: 15/278,677 - Filed: 2016-09-28 - Published: 2017-04-27 - Granted: 2019-06-11 - Earliest claimed: 2015-10-23 - Assignees: Sony Corporation - Applicants: Sony Mobile Communications Inc. - Inventors: Yoshihito Ishibashi - Web page: https://patentgrep.com/patent/US10321314B2 ## CPC - H04L 9/0866: {involving user or device identifiers, e.g. serial number, physical or biometrical information, DNA, hand-signature or measurable physical characteristics} - G06F 7/588: {Random number generators, i.e. based on natural stochastic processes} - H04L 9/0897: {involving additional devices, e.g. trusted platform module [TPM], smartcard or USB} - H04L 9/14: using a plurality of keys or algorithms - H04L 9/3271: {using challenge-response} - H04L 63/0428: {wherein the data content is protected, e.g. by encrypting or encapsulating the payload} - H04L 63/061: {for key exchange, e.g. in peer-to-peer networks (cryptographic mechanisms or cryptographic arrangements for key agreement H04L9/0838)} - H04L 63/0869: {for achieving mutual authentication (cryptographic mechanisms or cryptographic arrangements for mutual authentication H04L9/3273)} - H04W 12/02: Protecting privacy or anonymity, e.g. protecting personally identifiable information [PII] - H04W 12/03: Protecting confidentiality, e.g. by encryption - H04W 12/041: Key generation or derivation - H04W 12/0471: Key exchange - H04W 12/069: using certificates or pre-shared keys - H04L 2209/805: Lightweight hardware, e.g. radio-frequency identification [RFID] or sensor - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract There is provided a communication device including: a storage unit configured to store an authentication key generated from a plurality of keys; a communication unit configured to receive authentication key identification information for specifying the authentication key; and an authentication unit configured to perform an authentication process for a transmission source of the authentication key identification information using the authentication key specified from the storage unit based on the authentication key identification information. ## Claims ### Claim 1 A communication device comprising: a computer memory and configured to store an authentication key generated from a plurality of keys; a wireless transceiver and configured to receive authentication key identification information for specifying the authentication key; and a processor configured to perform an authentication process for a transmission source of the authentication key identification information using the authentication key specified from the computer memory based on the authentication key identification information, wherein the authentication key is generated and stored in the computer memory before the authentication key identification information is received by the wireless transceiver. ### Claim 2 (depends on 1) The communication device according to claim 1, wherein the authentication process includes a process for authenticating the communication device by the transmission source of the authentication key identification information. ### Claim 3 (depends on 2) The communication device according to claim 2, wherein the authentication key identification information is included in first information received by the less transceiver, and the processor encrypts second information including a first random number included in the first information using the specified authentication key, and causes the wireless transceiver to transmit the encrypted second information. ### Claim 4 (depends on 3) The communication device according to claim 3, wherein the authentication process includes a process for authenticating the transmission source of the authentication key identification information by the communication device. ### Claim 5 (depends on 4) The communication device according to claim 4, wherein the processor generates a second random number and causes the wireless transceiver to transmit the second information including the second random number, and decrypts third information received by the wireless transceiver with the specified authentication key, and determines whether or not the second random number is in the third information obtained through the decryption. ### Claim 6 (depends on 1) The communication device according to claim 1, wherein, when a demand for authentication key registration including key identification information for specifying the keys and the authentication key identification information is received, the authentication key is generated from the keys specified by the key identification information, and the computer memory stores the generated authentication key. ### Claim 7 (depends on 6) The communication device according to claim 6, wherein the demand for authentication key registration includes determination information for determining validity of information, the determination information being generated for the authentication key identification information and the key identification information included in the demand for authentication key registration. ### Claim 8 (depends on 1) The communication device according to claim 1, wherein the authentication process is performed using the authentication key generated based on key identification information for specifying the received keys, and the computer memory stores the authentication key generated in the authentication process. ### Claim 9 (depends on 8) The communication device according to claim 8, wherein the computer memory stores the authentication key generated in the authentication process based on reception of a demand for authentication key registration. ### Claim 10 (depends on 1) The communication device according to claim 1, wherein the computer memory deletes the authentication key when a predetermined condition is satisfied. ### Claim 11 (depends on 1) The communication device according to claim 1, wherein, when the authentication process succeeds, the processor permits the transmission source of the authentication key identification information to access data made to correspond to key identification information for specifying the keys. ### Claim 12 A communication device comprising: a wireless transmitter and configured to transmit authentication key identification information for specifying an authentication key generated from a plurality of keys; a computer memory and configured to store the authentication key; and a processor configured to perform an authentication process for a transmission destination of the authentication key identification information using the stored authentication key, wherein the authentication key is generated and stored in a receiving device that receives the transmitted authentication key identification information, before the authentication key identification information is transmitted by the wireless transceiver. ### Claim 13 (depends on 12) The communication device according to claim 12, wherein the wireless transceiver transmits a demand for authentication key registration including key identification information for specifying the keys and the authentication key identification information. ### Claim 14 (depends on 13) The communication device according to claim 13, wherein the authentication key identification information included in the demand for authentication key registration does not overlap authentication key identification information already in use. ### Claim 15 (depends on 12) The communication device according to claim 12, wherein: the processor is further configured to perform a process according to an authentication result in the authentication process. ### Claim 16 (depends on 15) The communication device according to claim 15, wherein, when the authentication process succeeds, the processing unit accesses data stored in the transmission destination of the authentication key identification information and made to correspond to key identification information for specifying the keys. ### Claim 17 (depends on 12) The communication device according to claim 12, wherein the wireless transceiver communicates using human body communication. ### Claim 18 A communication method comprising: storing; by a processor, an authentication key generated from a plurality of keys; receiving, by the processor, authentication key identification information for specifying the authentication key; and performing, by the processor, an authentication process for a transmission source of the authentication key identification information using the authentication key specified based on the authentication key identification information, wherein the authentication key is generated and stored before the authentication key identification information is received b the processor. ### Claim 19 A communication method comprising: transmitting, by a processor, authentication key identification information for specifying an authentication key generated from a plurality of keys; storing, by the processor, the authentication key; and performing, by the processor, an authentication process for a transmission destination of the authentication key identification information using the stored authentication key, wherein the authentication key is generated and stored in a receiving device that receives transmitted the authentication key identification information, before the authentication key identification information is transmitted by the processor. ### Claim 20 A communication system comprising: a first communication device; and a second communication device, wherein the first communication device includes a wireless transceiver configured to transmit authentication key identification information for specifying an authentication key generated from a plurality of keys, a computer memory configured to store the authentication key, and a processor configured to perform an authentication process for a transmission destination of the authentication key identification information using the stored authentication key, and the second communication device includes a second computer memory configured to store the authentication key generated from the plurality of keys, a second wireless transceiver configured to receive the authentication key identification information for specifying the authentication key, and a second processor configured to perform an authentication process for a transmission source of the authentication key identification information using the authentication key specified from the computer memory based on the authentication key identification information, wherein the authentication key is generated and stored in the second computer memory before the authentication key identification information is received by the second wireless transceiver.