DYNAMIC CRYPTOGRAPHY CHANGE SYSTEM

• Main Authors: IGUCHI SHINYA, UCHIYAMA HIROKI, KAJI TADASHI, HANAWA TERUNORI, MASUKO NAOYA, OKUBO SATOSHI
• Format: Patent
• Language: English
• Published: 13.03.2014
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

PROBLEM TO BE SOLVED: To achieve encryption processing that is high in integrity and secrecy of communication data in the constraint on a processing time.SOLUTION: A control device comprises: a requirement list storage unit which stores a security requirement for communication data corresponding to an application operating in the control device and a command used by the application; an evaluation result storage unit which stores an evaluation result associated with execution of a variety of encryption algorithms; an own device environment information storage unit which stores environment information indicating the state of the control device; and a cryptography selection unit which selects, from the variety of encryption algorithms, an encryption algorithm which encrypts the communication data and satisfies the security requirement, the evaluation result, and first environment information corresponding to an application having generated first communication data and a command used for generation of communication data by the application.