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If a block cipher is encrypting plain text of 128 bits, what will it do?

A. It will encrypt the 128 bits of plain text as 64 bits of cipher text.
B. It will encrypt the 128 bits of plain text as 192 bits of cipher text.
C. It will encrypt the 128 bits of plain text as 256 bits of cipher text.
D. It will encrypt the 128 bits of plain text as 128 bits of cipher text.

Answer :

Final answer:

A block cipher encrypts 128 bits of plain text as 128 bits of cipher text.


Explanation:

A block cipher is a type of encryption algorithm that encrypts data in fixed-size blocks. In the case of a 128-bit block cipher, it will encrypt 128 bits of plain text as 128 bits of cipher text. The cipher text is the encrypted form of the plain text, and it cannot be easily decrypted without the correct decryption key.


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