Question

What is the main difference between a simple XOR algorithm and CBC?

a.

CBC uses a key to encrypt the plaintext, while a simple XOR algorithm does not use a key.

b.

CBC XORs each plaintext block with the previous encrypted block, while a simple XOR algorithm does not use previous encrypted blocks.

c.

CBC is highly vulnerable, while a simple XOR algorithm is quite secure.

d.

None of the above

Posted under Reverse Engineering

Answer: (b).CBC XORs each plaintext block with the previous encrypted block, while a simple XOR algorithm does not use previous encrypted blocks. Explanation:The main difference between a simple XOR algorithm and CBC is that CBC XORs each plaintext block with the previous encrypted block, while a simple XOR algorithm does not use previous encrypted blocks.

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