| 摘要 |
Plain text, a secret key and a primitive polynomial that defines a finite field of even characteristic are received. The plain text is divided into a plurality of plain text blocks. For each plain text block of the plurality of plain text blocks other than a first plain text block, the plain text block is multiplied by a preceding cipher text block over the finite field of even characteristic, modulo the primitive polynomial, to generate an intermediate block, wherein the preceding cipher text block was generated from a preceding plain text block. Each intermediate block is processed by a block cipher using the secret key to generate a subsequent cipher text block. The block cipher operates in a nonlinear feedback mode of operation.
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