Cbc-pad is block chiper mode of operation in rc block cipher

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Q1) CBC-pad is a block chiper mode of operation used in RC5 block cipher, but it could be used in any block cipher. The pad bytes are all the same and set to a byte that represents the number of bytes of padding. For example, if there are 8 bytes of padding, each byte has the bit pattern 00001000. Why not allow zero bytes of padding? That is, if the original plaintext is an integer multiple of the block size, why not refrain from padding?

Reference no: EM1354482

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