Let us consider a simple encryption system based on the Feistel's scheme illustrated in the figure opposite.
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Question:
Let us consider a simple encryption system based on the Feistel's scheme illustrated in the figure opposite. If this system operates on blocks of 8 bits and uses the function f(b1b2b3b4)=b2b3bAb1.
1-Encrypt the plaintext message m=01011
2-Decrypt the cipher c= 01101011
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Data Analysis and Decision Making
ISBN: 978-0538476126
4th edition
Authors: Christian Albright, Wayne Winston, Christopher Zappe
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