In telecommunication, the term decrypt has the following meanings: Telecommunication is the extension of communication over a distance. ...

1. [A] generic term encompassing decode and decipher. For other senses of the word code, see code (disambiguation). ... Decipherment is the analysis of documents written in ancient languages, where the language is unknown, or knowledge of the language has been lost. ...

2. To convert encrypted text into its equivalent plaintext by means of a cryptosystem. (This does not include solution by cryptanalysis.) In cryptography, plaintext is information used as input to an encryption algorithm; the output is termed ciphertext. ... A cryptosystem (or cryptographic system) is the package of all procedures, protocols, cryptographic algorithms and instructions used for encoding and decoding messages using cryptography. ... Cryptanalysis (from the Greek kryptós, hidden, and analýein, to loosen or to untie) is the study of methods for obtaining the meaning of encrypted information without access to the secret information which is normally required to do so. ...

Note: The term "decrypt" covers the meanings of "decipher" and "decode."

Source: from Federal Standard 1037C and from the National Information Systems Security Glossary and from the Department of Defense Dictionary of Military and Associated Terms Federal Standard 1037C entitled Telecommunications: Glossary of Telecommunication Terms is a U.S. Federal Standard, issued by the General Services Administration pursuant to the Federal Property and Administrative Services Act of 1949, as amended. ... The National Information Systems Security Glossary, published by the National Security Telecommunications and Information Systems Security Committee of the United States federal government, is an unclassified glossary of Information Systems Security (INFOSEC) terms intended to provide a common vocabulary for discussing INFOSEC. External links Online copy in Adobe Acrobat format... The Department of Defense Dictionary of Military and Associated Terms is a compedium of terminology used by the United States Department of Defense (DOD). ...