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← Logic & PuzzlesA cryptographic hash function maps input data to a fixed-size output. If a weak hash function's output length is a prime number, what outcome directly compromises its security?
A)Increased collision resistance strength
B)Enhanced pre-image attack resistance
C)Susceptibility to birthday attacks increases✓
D)Improved data integrity verification speed
💡 Explanation
When the output length is prime, the Birthday attack becomes more effective because the expected number of hashes before finding a collision is the square root of the hash space; therefore, it becomes easier to find collisions, rather than enhancing security by any means.
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