Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1984-12-21
1987-07-07
Cangialosi, Salvatore
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
380 25, 380 28, 380 44, 235380, 235382, H04L 900, G06K 500
Patent
active
046792368
ABSTRACT:
A secure system provides identification verification by transmission of an access number, preferably a random number, from a central processor to a remote terminal. The system provides portable identification devices for use by individuals, programmed to perform specified mathematical functions on data input thereto. The user obtains the access number from a remote terminal, and provides selected digits therefrom as input to the portable device. The result of the mathematical function performed on the selected digits is transmitted to the host processor for comparison with a similar result obtained by performing the mathematical function associated with the identified user on a selected subset of digits of the access number selected in accordance with a selection pattern associated with the user. As a further step for securing operation of the system, only selected digits of the results may be provided for comparison.
REFERENCES:
patent: 4259720 (1981-03-01), Campbell
patent: 4281215 (1981-07-01), Alalla
patent: 4302810 (1981-11-01), Bouricius et al.
patent: 4453074 (1984-06-01), Weinstein
patent: 4471216 (1984-09-01), Herve
Cangialosi Salvatore
Lewis Aaron J.
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