COMPUTER ETHICS AND SECURITY
CRYPTOGRAPHY AND ENCRYPTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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128 Bits
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32 Bits
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64 Bits
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16 Bits
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Detailed explanation-1: -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.
Detailed explanation-2: -The DES algorithm uses a key of 56-bit size. Using this key, the DES takes a block of 64-bit plain text as input and generates a block of 64-bit cipher text.
Detailed explanation-3: -The DES keys are 64-bit, 128-bit, and 192-bit keys that use the DES algorithm to perform the cryptographic function. A 64-bit key is referred to as a single-length key. A 128-bit key is referred to as a double-length key.
Detailed explanation-4: -DES uses a 64-bit key, but because eight of those bits are used for parity checks, the effective key length is only 56 bits. The encryption algorithm generates 16 different 48-bit subkeys, one for each of the 16 encryption rounds.
Detailed explanation-5: -The Triple DES encryption process It works by taking three 56-bit keys (K1, K2 and K3) known as a key bundle and encrypting first with K1, decrypting next with K2 and encrypting a last time with K3.