Apparatus and methods for verifying the identity of a party

Details Apparatus and methods for verifying the identity of a party Apparatus and methods for verifying the identity of a party

1995-08-28

1998-02-24

Cain, David C.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 30, H04K 100

Patent

active

057217793

ABSTRACT:
Apparatus for verifying the identity of a party are disclosed, the apparatus including a database memory that stores a password signal encrypted by operation of a one-way commutative function; a number generator that generates an non-repeating number or signal representative thereof; and a processor element that can generate a challenge signal as a function of the number signal and a selected one-way commutative function and that can further generate a key signal as a function of the encrypted password signal and the number. The system includes a communication port for transmitting the generated challenge signal to a party requesting access to the secure system and for receiving a response from the party; and further includes a comparator element for comparing the received response with the generated key signal and for generating a match signal that indicates whether the response signal received from the party is substantially identical to the encrypted password signal stored in the database memory.

REFERENCES:
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patent: 4218582 (1980-08-01), Hellman et al.
patent: 4376299 (1983-03-01), Rivest
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patent: 4633036 (1986-12-01), Hellman et al.
patent: 4658093 (1987-04-01), Hellman
patent: 4995082 (1991-02-01), Schnorr
patent: 5144667 (1992-09-01), Pogue, Jr. et al.
Schneier, B., Applied Cryptography, John Wiley & Sons, Inc., New York, Foreward pp. xi-xvii.; Ch. 1, pp. 1-3; Ch. 14, pp. 321-324, 329-333, (1994).

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