DECIPHERMENT

decoding, decryption, decipherment

(noun) the activity of making clear or converting from code into plain text; “a secret key or password is required for decryption”

Source: WordNet® 3.1

Etymology

Noun

decipherment (countable and uncountable, plural decipherments)

The analysis of documents written in ancient languages, where the language is unknown, or knowledge of the language has been lost.

Decryption.

Source: Wiktionary

De*ci"pher*ment, n.

Definition: The act of deciphering.

Source: Webster’s Unabridged Dictionary 1913 Edition