What constants are needed for block sizes of 64 and 128 bit

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In the discussion of subkey generation in CMAC, it states that the block cipher isapplied to the block that consists entirely of 0 bits. The first subkey is derived from theresulting string by a left shift of one bit, and, conditionally, by XORing a constant thatdepends on the block size. The second subkey is derived in the same manner from thefirst subkey.a. What constants are needed for block sizes of 64 and 128 bits?

Reference no: EM131041288

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