Stream Ciphers
In stream ciphers, IVs are loaded into the keyed internal secret state of the cipher, after which a number of cipher rounds is executed prior to releasing the first bit of output. For performance reasons, designers of stream ciphers try to keep that number of rounds as small as possible, but because determining the minimal secure number of rounds for stream ciphers is not a trivial task, and considering other issues such as entropy loss, unique to each cipher construction, related-IVs and other IV-related attacks are a known security issue for stream ciphers, which makes IV loading in stream ciphers a serious concern and a subject of ongoing research.
Read more about this topic: Initialization Vector
Famous quotes containing the word stream:
“So near along life’s stream are the fountains of innocence and youth making fertile its sandy margin; and the voyageur will do well to replenish his vessels often at these uncontaminated sources.”
—Henry David Thoreau (1817–1862)