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← Logic & PuzzlesIf a symmetric cryptographic key undergoes bitwise reflection across its midpoint, which consequence follows?
A)Encryption becomes computationally simpler
B)Key entropy always increases slightly
C)Decryption becomes mathematically impossible
D)Encryption becomes equivalent to decryption✓
💡 Explanation
Bitwise reflection means inverting the order of bits. Because a symmetric key is used for both encryption and decryption, if the key is reflected, the decryption operation effectively uses the encryption key and vice versa, therefore encryption becomes equivalent to decryption, rather than causing other computational changes.
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