NETWORK SECURITY
CONFIDENTIALITY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The number of unique substitution boxes in DES after the 48 bit XOR operation are
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8
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4
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6
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12
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Explanation:
Detailed explanation-1: -The DES (Data Encryption Standard) algorithm is a symmetric-key block cipher created in the early 1970s by an IBM team and adopted by the National Institute of Standards and Technology (NIST). The algorithm takes the plain text in 64-bit blocks and converts them into ciphertext using 48-bit keys.
Detailed explanation-2: -DES is a block cipher that operates on data blocks of 64 bits in size. DES uses a 64-bit key 8 × 8 including 1 bit for parity, so the actual key is 56 bits.
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