Data decryption apparatus and data encryption apparatus

Details Data decryption apparatus and data encryption apparatus Data decryption apparatus and data encryption apparatus

2011-08-23

2011-08-23

Barron, Jr., Gilberto (Department: 2432)

Cryptography

Communication system using cryptography

Symmetric key cryptography

C380S278000, C380S273000, C380S033000

Reexamination Certificate

active

08005219

ABSTRACT:
A data decryption apparatus that decrypts encrypted data, includes a first data-receiving unit that receives a first data set, in which information on an encryption specification is embedded, through a first communication path; a time-information obtaining unit that obtains time information on a reception of the first data set by the first data receiving unit; a time-information storage unit that stores the time information with the information on the encryption specification associated therewith; a second data-receiving unit that receives a second data set through a second communication path, the second data set being encrypted based on the encryption-specification and appended by time information on performing data encryption; and an encryption-specification selecting unit that selects an encryption specification for use in decryption of the second data set based on the time information stored in the time-information storage unit and the time information appended to the second data set.

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Extended European Search Report, mailed Dec. 19, 2007 and issued in corresponding European Patent Application No. 07112703.9-2415.

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