Security and ticketing system control and management

Details Security and ticketing system control and management Security and ticketing system control and management

2011-05-31

2011-05-31

Cervetti, David García (Department: 2436)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C713S169000, C726S027000

Reexamination Certificate

active

07953977

ABSTRACT:
A security device of this invention includes a nonvolatile storage unit22for storing a validity check unit including a counter updated every time signature function means30is called up, a volatile storage unit24for reading and storing a counter array out of an external nonvolatile storage unit storing the counter array, in which the counter array is obtained by coupling a hash value generated for each signature key with a signature number counter for counting the number of signatures performed by use of the signature key, and a hash function unit28for reading the counter array out of the volatile storage unit24, generating the hash value, and transferring the hash value to the validity check unit for a validity check.

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