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- Stream_cipher abstract "A stream cipher is a symmetric key cipher where plaintext digits are combined with a pseudorandom cipher digit stream (keystream). In a stream cipher each plaintext digit is encrypted one at a time with the corresponding digit of the keystream, to give a digit of the ciphertext stream. Since encryption of each digit is dependent on the current state of the cipher, so it is also known as state cipher. In practice, a digit is typically a bit and the combining operation an exclusive-or (XOR)(see cipher)The pseudorandom keystream is typically generated serially from a random seed value using digital shift registers. The seed value serves as the cryptographic key for decrypting the ciphertext stream.Stream ciphers represent a different approach to symmetric encryption from block ciphers. Block ciphers operate on large blocks of digits with a fixed, unvarying transformation. This distinction is not always clear-cut: in some modes of operation, a block cipher primitive is used in such a way that it acts effectively as a stream cipher. Stream ciphers typically execute at a higher speed than block ciphers and have lower hardware complexity. However, stream ciphers can be susceptible to serious security problems if used incorrectly (see stream cipher attacks); in particular, the same starting state (seed) must never be used twice.".
- Stream_cipher thumbnail A5-1_GSM_cipher.svg?width=300.
- Stream_cipher wikiPageExternalLink movies.php.
- Stream_cipher wikiPageExternalLink EPFL_TH4040.pdf.
- Stream_cipher wikiPageExternalLink thesis-167.pdf.
- Stream_cipher wikiPageExternalLink Goettfert_Gammel_On_the_frame_length_of_Achterbahn-128-80_ITW2007.pdf.
- Stream_cipher wikiPageID "49007".
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- Stream_cipher wikiPageWikiLink Attack_(computing).
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- Stream_cipher wikiPageWikiLink Category:Cryptographic_primitives.
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- Stream_cipher wikiPageWikiLink Chameleon_(cipher).
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- Stream_cipher wikiPageWikiLink Intel_P5_(microarchitecture).
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- Stream_cipher wikiPageWikiLink Residual_block_termination.