Question: 3. Alice designs a new hash function H: give a message M, she first chops the message into 128-bit blocks, B1, B2, B3, compute the

3. Alice designs a new hash function H: give a message M, she first chops the message into 128-bit blocks, B1, B2, B3, compute the hash H(M) by XORing all blocks then XORing a given 128-bit sequence S that is known to everyone; that is, H(M)= B1 XOR B2 XOR B3 XOR S. Is this hash function good and why?

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