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CRYPTOGRAPHIC METHOD USING A DATA FLOW-SYMMETRICAL CRYPTOGRAPHIC ALGORITHM AND USE IN A SMART CARD
CRYPTOGRAPHIC METHOD USING A DATA FLOW-SYMMETRICAL CRYPTOGRAPHIC ALGORITHM AND USE IN A SMART CARD
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机译：使用数据流对称密码算法的密码方法及其在智能卡中的使用
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摘要
Method has the following steps: concatenation of an index (i) supplied by a counter with a first sub-key (K2) to form a first data value (D1) of given length; application of the first data value to the input to the algorithm encryption block (E) with a second sub-key (K1) of a different length to generate a second output data value (D2); and execution of an exclusive OR operation bit by bit with a third key (K3) of the same length as the first sub-key to form a pseudo random number as a function of the first, second and third sub-keys. The invention also relates to a corresponding chip card using the inventive encryption technology.
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