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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transform
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hash
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block
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stream
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symmetric
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Detailed explanation-1: -Block ciphers convert data in plaintext into ciphertext in fixed-size blocks. The block size generally depends on the encryption scheme and is usually in octaves (64-bit or 128-bit blocks).
Detailed explanation-2: -DES and 3DES are block ciphers. This refers to an algorithm that takes a block of plaintext of a fixed length and changes it into a block of ciphertext (encrypted data) of the same length.
Detailed explanation-3: -AES-128 uses a 128-bit key length to encrypt and decrypt a block of messages. AES-192 uses a 192-bit key length to encrypt and decrypt a block of messages.
Detailed explanation-4: -In cryptography, a block cipher is a deterministic algorithm operating on fixed-length groups of bits, called blocks. Block ciphers are specified elementary components in the design of many cryptographic protocols and are widely used to encrypt large amounts of data, including in data exchange protocols.
Detailed explanation-5: -LEA is a block cipher with 128-bit block. Key size is 128-bit, 192-bit, and 256-bit. The number of rounds is 24 for 128-bit keys, 28 for 192-bit keys, and 32 for 256-bit keys.