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What is data encryption standard (DES)?(a) block cipher(b) stream cipher(c) bit cipher(d) byte cipherI had been asked this question in an online interview.Origin of the question is Cryptography topic in chapter Networking of Computer Network |
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Answer» CORRECT OPTION is (a) block cipher The explanation is: DES is a symmetric key block cipher in which the block size is 64 bits and the key size is 64 bits. It is VULNERABLE to some attacks and is hence not that popularly used. |
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