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Tiger is a 192-bit cryptographic message digest (hash function). A design goal of an ideal hash function is to distribute the input entropy evenly over the message digest. If an input string of 40 bytes with 28 bytes (224 bits) of entropy is hashed by Tiger, the resultant 192-bit string will have at most 192 bits, since the output cannot have more entropy ...


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A XOR B can be replicated in multiple instructions as ((NOT A) AND B) or (A and (NOT B)). This could be used to validate the result of XOR with some confidence that a targeted backdoor would be increasingly difficult to implement over multiple instructions.



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