![]() ![]() Polygram substitution consists in substituting a group of characters (polygram) in the message by another group of charactersĬomputer Security MCQs – Multiple Choice Questions and Answers – Part 1 Multiple choice questions and answers (MCQs) on Computer Security to prepare for exams, tests, and certifications. ![]() ![]() Homophonic substitution allows matching each letter of the message with a possible set of other characters. ![]() Encryptions by poly- alphabetic substitution, with several alphabets. Many variations are possible: Ciphers by mono-alphabetic substitution, with a disordered alphabet, one letter replaces another.
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