4 relations: Cryptography, Keystream, Security level, Stream cipher.
Cryptography
Cryptography or cryptology (from κρυπτός|translit.
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Keystream
In cryptography, a keystream is a stream of random or pseudorandom characters that are combined with a plaintext message to produce an encrypted message (the ciphertext).
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Security level
In cryptography, security level is a measure of the strength that a cryptographic primitive — such as a cipher or hash function — achieves.
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Stream cipher
A stream cipher is a symmetric key cipher where plaintext digits are combined with a pseudorandom cipher digit stream (keystream).
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