1.2 Stream cipher
Designing of these algorithms to accept a crypto key and a
stream of plain text to produce a stream of cipher text. Stream
cipher comprises of two main components: a mixing function
and a key stream [2]. Mixing function is usually exactly an
XOR function, whereas key stream generator is the main unit in
stream cipher encryption [1, 3]. Stream cipher basically
operates on small units of plain text. It is faster than block
cipher. Stream cipher produces the input element continuously
producing one output at a time. It uses fewer amounts of codes
and key is uses only once. Many stream cipher algorithms are
used for hardware implementation. Stream cipher encrypts
smaller block of data, typically bits or bytes. A key stream
generator outputs a stream of bits K1, K2,K3….Ki. This key
stream is XORed with a stream of plain bits p1, P2,P3….Pi to
produce the stream of cipher text bits.
1.2 Stream cipherDesigning of these algorithms to accept a crypto key and astream of plain text to produce a stream of cipher text. Streamcipher comprises of two main components: a mixing functionand a key stream [2]. Mixing function is usually exactly anXOR function, whereas key stream generator is the main unit instream cipher encryption [1, 3]. Stream cipher basicallyoperates on small units of plain text. It is faster than blockcipher. Stream cipher produces the input element continuouslyproducing one output at a time. It uses fewer amounts of codesand key is uses only once. Many stream cipher algorithms areused for hardware implementation. Stream cipher encryptssmaller block of data, typically bits or bytes. A key streamgenerator outputs a stream of bits K1, K2,K3….Ki. This keystream is XORed with a stream of plain bits p1, P2,P3….Pi toproduce the stream of cipher text bits.
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