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which operates on fixedlength groups of bits with an unvarying transformation?

Which of the following refers to a symmetric key cipher which operates on fixedlength groups of
bits with an unvarying transformation?

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A.
stream cipher

B.
block cipher

C.
check cipher

D.
string cipher

E.
None of the choices.

Explanation:

In cryptography, a block cipher is a symmetric key cipher which operates on fixed-length groups of
bits, termed blocks, with an unvarying transformation.
A stream cipher, on the other hand, operates on individual digits one at a time.


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