Data encryption key failure monitor

Details Data encryption key failure monitor Data encryption key failure monitor

1988-11-30

1990-05-15

Buczinksi, Stephen C.

Cryptography

Equipment test or malfunction indication

380 44, 380 47, H04K 100, H04L 902

Patent

active

049264753

ABSTRACT:
An encryption key, required to encrypt and decrypt data according to a predefined algorithm is usually retained in a volatile memory device. Detection of loss of the key or corruption of the key is frequently possible only be means of the encryption circuit itself testing the key. Automated and repetitive testing of encryption keys by means of a processor or a control circuit periodically requesting the encryption circuit to test an encryption key minimizes data loss and system down time due to corrupted or lost keys.

REFERENCES:
patent: 4211915 (1980-07-01), Miller et al.
patent: 4229817 (1980-10-01), Morgan et al.
patent: 4281216 (1981-07-01), Hogg et al.
patent: 4465153 (1984-08-01), Van de Pas et al.

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