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Self-Authenticating cryptographic apparatus

Patent image
NSA

A self-authenticating apparatus for effecting secure communication of a binary signal. In the encipherment apparatus, key is generated as a function of plain text summed with a pseudorandom linear sequence. The decipherment apparatus performs a reverse function in an autokey mode. Incoming cipher text is summed with generated key to create a plain text stream. As in the encipherment device, key is generated as a function of the resulting plain text summed with a pseudorandom linear sequence.

Inventors: 
Palmatier, Thomas E.
Patent Number: 
Technical domain: 
Communications
FIle Date: 
1983-06-13
Grant Date: 
2005-06-28
Grant time: 
8,051 days
Grant time percentile rank: 
97
Claim count percentile rank: 
4
Citations percentile rank: 
1
'Cited by' percentile rank: 
2
Assignee: 
NATIONAL SECURITY AGENCY