stream cipher

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Definitions:

Sequence of symbols (or their electrical or mechanical equivalents) produced in a machine or auto-manual cryptosystem to combine with plain text to produce cipher text, control transmission security processes, or produce key. Note: Common types of ciphers are stream and block ciphers, which each have unique strengths and weaknesses. Ciphers are often separated by types of keys into asymmetric and symmetric key algorithms.
Sources:
CNSSI 4009-2022 from Handbook of Applied Cryptography

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