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We define collision as: A collision occurs if we have x=y and H(x) = H(y).

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in Cryptograph & Network Security by (60.1k points)
We define collision as: A collision occurs if we have x=y and H(x) = H(y).

(a) True

(b) False

The question was posed to me in exam.

My question is from Hash Functions Based on Cipher Block Chaining in section Other Public Key Cryptosystems and Cryptographic Hash Functions of Cryptograph & Network Security

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The correct option is (b) False

Explanation: A collision occurs if we have x not equal to y and H(x) = H(y).

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