Secure mode answering machine

Details Secure mode answering machine Secure mode answering machine

1990-05-29

1991-11-12

Tarcza, Thomas H.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 50, 379 88, 379 89, H04K 100

Patent

active

050654284

ABSTRACT:
A secure answering machine allows both secure and non-secure information to be recorded by incorporating a digital signal processor (DSP) and both a secure and non-secure RAM. The secure RAM is powered entirely by battery. The battery is then connected to the housing of the answering machine such that when the housing is tampered with, the power from the battery is shut off eliminating all information stored on the secure RAM. The secure RAM is only accessed using an encrypting code.

REFERENCES:
patent: 4626623 (1986-12-01), La Haye
patent: 4881263 (1989-11-01), Herbison et al.
patent: 4888802 (1989-12-01), Cooney
patent: 4937861 (1990-06-01), Cummins

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