Key hashing in data processors

Details Key hashing in data processors Key hashing in data processors

1991-10-08

1993-03-30

Cangialosi, Salvatore

Cryptography

Key management

Having particular key generator

380 50, H04F 900

Patent

active

051990733

ABSTRACT:
A system is described for producing a near-random hash value from a key value. In a preferred embodiment the system comprises the steps of combining each key byte in turn with a corresponding byte in a predefined table; substituting each key byte with a byte from a second table, the location of the substitute byte in the table being equal to the value of the key byte; and using a propagated exclusive-OR to produce a four-byte value, which is then manipulated and scaled to produce a hash value in the desired range.

REFERENCES:
patent: 4215402 (1980-07-01), Mitchell et al.
patent: 4418275 (1983-11-01), Oosterbaan et al.
patent: 4611272 (1986-09-01), Lomet
patent: 4780816 (1988-10-01), Connell
patent: 4922417 (1990-05-01), Churm et al.

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