Symmetric-key encryption can use either beck ciphers or block ciphers
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Stream ciphers encrypt the $.25 of a bulletin one at a time
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Block ciphers booty a cardinal of $.25 and encrypt them as a distinct unit. Blocks of 64 $.25 accept been frequently used. The Advanced Encryption Standard (AES) algorithm accustomed by NIST in December 2001 uses 128-bit blocks.
.
Stream ciphers encrypt the $.25 of a bulletin one at a time
.
Block ciphers booty a cardinal of $.25 and encrypt them as a distinct unit. Blocks of 64 $.25 accept been frequently used. The Advanced Encryption Standard (AES) algorithm accustomed by NIST in December 2001 uses 128-bit blocks.
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