Information processing device, mobile device, and communication system

• Main Authors: YAMAMOTO, HIROTAKE, MIYAMOTO, TAKASHI, AKISHITA, TORU, OOSAWA, YOSHITOMO
• Format: Patent
• Language: Chinese; English
• Published: 16.07.2022
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

The present disclosure relates to an information processing device, a mobile device, and a communication system which make it possible to update session keys. A first communication, which includes the transmission or reception of a command for controlling a second communication of higher speed than the first communication or a response to said command, is used to derive a first secret from a key schedule, a first session key related to said first secret is derived, said first session key is used in encryption or message authentication of the first communication, the first communication is used to receive, transmit, or derive a second session key, said second session key is used in encryption or message authentication of the second communication, the first communication is used to receive, transmit, or derive a third session key, and use of said third session key in place of the second session key is initiated. The present technology is applicable to, for example, communication systems compliant with MIPI stan