Commercial data masking

Details Commercial data masking Commercial data masking

1992-10-16

1994-06-21

Buczinski, Stephen C.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 29, 380 44, H04L 902, H04L 900, H04K 100

Patent

active

053234642

ABSTRACT:
A method and system are disclosed for the implementation of a weakened privacy channel. This is achieved through use of a weakened symmetric cryptographic algorithm called commercial data masking. The masked text is created from clear text at one system and may to transported electronically to another system where the masked text may be unmasked to produce the clear text. The reason to use the commercial data masking algorithm for data privacy is that it is exportable to organizations to which products which contain the Data Encryption Algorithm when used for data privacy are not exportable. In addition, a method and system is disclosed by which the key when used for commercial data masking may be transformed into a key that may be used with the Data Encryption Algorithm.

REFERENCES:
patent: 3958081 (1976-05-01), Ehrsam et al.
patent: 3962539 (1976-06-01), Ehrsam et al.
patent: 4405829 (1983-09-01), Rivest et al.
patent: 4941176 (1990-07-01), Matyas et al.
patent: 5142578 (1992-08-01), Matyas et al.
ANSI X 3.92, 1981, "Data Encryption Algorithm".

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