The S-boxes used in the DES have been looked at in various aspects like non-linearity,propagation characteristics and 1/0 correlation immunity. In the present work we try to make a cryptographic study of these boxes from a new viewpoint, namely,by investigating the way in which the uncertainty of the 6-bit key vector k which controls the work of an S-box diminishes,when a certain set of distinct plaintext vectors
Encryption Algorithm Equivalent Classis Output Position Query Vector Mutual Connection
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