In a ____ a group of plaintext letters gets encoded into ciphertext, but not by substituting one at a time for each character.

Question

Quizplus · Accepted Answer

A block cipher encodes a group of plaintext letters (i.e., a block of text) into ciphertext using an encryption algorithm that operates on the entire block at once, rather than substituting one character at a time. This makes block ciphers more secure than simple substitution ciphers like the Caesar and shift ciphers. Stream ciphers, on the other hand, encode messages one bit or byte at a time, rather than operating on fixed-size blocks.

In a ____ a Group of Plaintext Letters Gets Encoded