About this document
Symmetric Encryption: Block Ciphers Overview by T is a document available to read on EtoBox.
Block ciphers encrypt data one block at a time using a secret key. They include DES and AES, which operate on 64-bit and 128-bit blocks respectively. Feistel ciphers like DES improve security by alternating rounds of substitution and permutation using subkeys derived from the main key. They exhibit strong diffusion, meaning a single bit change in the plaintext or key propagates to many bits of the ciphertext.
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- T
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- EN