Apparatus and method for securing captured data transmitted betw

Details Apparatus and method for securing captured data transmitted betw Apparatus and method for securing captured data transmitted betw

1997-02-04

1998-05-12

Cain, David C.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 49, H04K 100

Patent

active

057518092

ABSTRACT:
Implemented preferably within a video camera, a secure data capture device is used to prevent a captured data clip from be fraudulently altered without detection. The secure data capture device performs "time-bracketing" and/or "sequence ordering" operations to preserve data integrity through implementation of two registers incorporating a "State of the Universe" ("SOTU") number and a "sequence" number, respectively. Time-bracketing is performed by digitally signing a running hash value representing the data clip appended to the SOTU number before the digital signature is "timestamped". Sequence ordering is performed by digitally signing the digest of the data frame or multiple data frames along with the sequence number.

REFERENCES:
patent: 5005200 (1991-04-01), Fischer
patent: 5136646 (1992-08-01), Haber et al.
patent: 5136647 (1992-08-01), Haber et al.
patent: 5189700 (1993-02-01), Blandford
patent: 5321749 (1994-06-01), Virga
patent: 5422953 (1995-06-01), Fischer
patent: 5499294 (1996-03-01), Friedman

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