Which statement is correct?

Select one:

a$.$ Transposition Cipher shifts characters

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around according to a regular scheme

so that the result is a permutation of

the original message.

b$.$ Transposition Cipher uses a public key

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to encode messages.

c$.$ Transposition Cipher substitutes

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characters in the original message

according to a fixed scheme.

d$.$ Using matrix transpose, Transposition

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Cipher is based on linear algebra.

Clear my choice