Decipherment n. : The act of deciphering.

Example:
What is the significance of Coptic Language to Jean Francois Champollion’s Decipherment of the hieroglyphs?

Taxonomy
Decipherment, language, free encyclopedia, decipher, ancient languages, search, the Human Genome Project, metaphorically, mean something, Famous documents, decipherments, the Rosetta Stone, numerals, Personal tools, Interaction, Toolbox, non-profit organization, Indus script.

Defination from the web:
Decipherment is the analysis of documents written in ancient languages, where the language is unknown, or knowledge of the language has been lost. It is closely related to cryptanalysis — the difference being that the original document was not deliberately written to be difficult to decipher. ...