GDES

In cryptography, the Generalized DES Scheme (GDES or G-DES) is a variant of the DES symmetric-key block cipher designed with the intention of speeding up the encryption process while improving its security. The scheme was proposed by Ingrid Schaumuller-Bichl in 1981. In 1990, Eli Biham and Adi Shamir showed that GDES was vulnerable to differential...
Found on http://en.wikipedia.org/wiki/GDES
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