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XOR, or eXclusive OR, is a boolean operation commonly found in cryptography. XOR is a two-input boolean logic gate with the following truth table:

A B  O
0 0  0
0 1  1
1 0  1
1 1  0

That is to say, output is true when either A is true or B is true but NOT both or neither. The XOR function can be contrast with IOR. The "XOR metric" is used by the KADEMLIA project.

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