Multiplexing a secure counter to implement second level...

Details Multiplexing a secure counter to implement second level... Multiplexing a secure counter to implement second level...

2002-06-28

2008-09-02

Sheikh, Ayaz (Department: 2131)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C713S187000, C713S189000, C726S026000, C726S027000, C726S028000, C726S029000, C726S030000, C726S031000, C726S032000, C380S201000, C705S050000, C705S051000, C705S052000

Reexamination Certificate

active

07421579

ABSTRACT:
A multiplexed secure counter is provided, in which a multiplicity of child secure counters are secured by a parent secure counter. Child counters are stored with a parent secure counter value and a signature. Before a child counter is read, the signature is verified and value stored is checked against the current value of the parent secure value. If the verifications are successful, the child secure counter can be used. To increment a child counter, the signature is verified and the value stored checked against the current value of the parent secure value. If the verifications are successful, the parent counter and the child counter are incremented, and the data is signed again.

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