This problem provides a numerical example of encryption using a one-round version of DES. We start with the same bit pattern for the key K and the plaintext, namely: Hexadecimal notation: 0123456789 A B C D E F Binary notation: 00000001001000110100010101100111 10001001101010111100110111101111 a. Derive K1, the first-round subkey. b. Derive L0, R0. c. Expand R0 to get E[R0], where E[·] is the expansion function of Table S.1. d. Calculate A=E[R0] ⊕K1. e. Group the 48-bit
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