Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1997-05-16
1999-12-21
Cangialosi, Salvatore
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
380 21, 379198, H04L 900
Patent
active
060059419
ABSTRACT:
A private branch exchange has optional service modules for providing optional service functions. The optional service modules are initially disabled, but can be enabled through a telecommunication link, in reply to owner information furnished by the private branch exchange. If the owner information is incorrect, the optional service modules can still be enabled, but the owner information stored in the private branch exchange is altered to leave evidence of the enabling operation. The enabling is carried out by remote authorization equipment according to an authorization key that specifies both the required optional service modules and the owner information. The authorization key is stored on a data medium that can be read only once.
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Cangialosi Salvatore
Frank Robert J.
Oki Electric
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