Cryptography – Communication system using cryptography – Time segment interchange
Patent
1995-07-20
1997-08-05
Buczinski, Stephen C.
Cryptography
Communication system using cryptography
Time segment interchange
380 21, 380 43, 380 45, H04K 104, H04L 900
Patent
active
056550219
ABSTRACT:
The invention relates to a method for checking data sequences, comprising a protection step and a verification step, with a control sequence being formed in the protection step on the basis of an identification sequence, which identification sequence comprises identification values which identify data sequences which are to be protected, and which control sequence comprises control values of which at least some have been formed on the basis of operation values, which operation values have been derived from data of sequences which were identified by the said identification values, and with the data sequences being verified, in the verification step, on the basis of the control values. In accordance with the invention control values are formed, successively, by combining an identification value with an operation value related to a preceding control value. The invention is especially useful for verifying data files.
REFERENCES:
patent: 4074066 (1978-02-01), Ehrsam et al.
B. Schneir; Applied Cryptography; John Wiley & Sons; 1993; pp. 157-160.
B. Schneir; Applied Cryptography, Second Edition; John Wiley & Sons; 1996; pp. 193-196.
Buczinski Stephen C.
Koninklijke PTT Nederland N.V.
Michaelson Peter L.
Pokotylo John C.
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