Cryptography – Communication system using cryptography – Time segment interchange
Reexamination Certificate
2006-07-18
2006-07-18
Sheikh, Ayaz (Department: 2136)
Cryptography
Communication system using cryptography
Time segment interchange
C380S028000, C380S029000
Reexamination Certificate
active
07079651
ABSTRACT:
A method and apparatus for cryptographically converting a digital input data block into a digital output data block. The apparatus has an input for supplying the input data block and a further input for supplying a code conversion digital key K1. Cryptographic processing merges a selected part M1of the digital input data block with the key K1to produce a data block B1that is non-linearly dependent on M1and K1. The merging is performed in one sequentially inseparable step. The digital output block is derived from a selected part of the data block B1.
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Koninklijke Philips Electronics , N.V.
Parthasarathy Pramila
Sheikh Ayaz
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