substitution cipher English

Meaning substitution cipher meaning

What does substitution cipher mean?

substitution cipher noun

— (cryptography) a method of encryption by which units of plaintext are substituted with ciphertext according to a regular system; the "units" may be single letters (the most common), pairs of letters, triplets of letters, mixtures of the above, and so forth. The receiver deciphers the text by performing an inverse substitution.

Examples substitution cipher examples

How do I use substitution cipher in a sentence?

Movie subtitles

Champollion discovered that the hieroglyphics were a simple substitution cipher.