# Term:Cryptography

## Contents

## CNSSI 4009

Cryptography - Art or science concerning the principles, means, and methods for rendering plain information unintelligible and for restoring encrypted information to intelligible form.

## DoD 5200.1-R

Cryptography - The branch of cryptology that treats the principles, means, and methods of designing and using cryptosystems. AP2.1.22.

## DSS Glossary

Cryptography - Art or science concerning the principles means and methods for rendering plain information unintelligible and of restoring encrypted information to intelligible form.

## GAO-09-232G

Cryptography - The science of coding messages so they cannot be read by any person other than the intended recipient. Ordinary text-or plain text-and other data are transformed into coded form by encryption and translated back to plain text or data by decryption.

## NIST IR 7298

Cryptography - Is categorized as either secret key or public key. Secret key cryptography is based on the use of a single cryptographic key shared between two parties . The same key is used to encrypt and decrypt data. This key is kept secret by the two parties. Public key cryptography is a form of cryptography which make use of two keys: a public key and a private key. The two keys are related but have the property that, given the public key, it is computationally infeasible to derive the private key [FIPS 140-1]. In a public key cryptosystem, each party has its own public/private key pair. The public key can be known by anyone; the private key is kept secret. SOURCE: FIPS 191

## NIST IR 7298

Cryptography - The discipline that embodies principles, means and methods for providing information security, including confidentiality, data integrity, non- repudiation, and authenticity. SOURCE: SP 800-21 [2nd Ed]

## NIST IR 7298

Cryptography - The discipline that embodies the principles, means, and methods for the transformation of data in order to hide their semantic content, prevent their unauthorized use, or prevent their undetected modification. SOURCE: SP 800-59; ANSDIT

## NIST SP 800-59

Cryptography - The discipline that embodies the principles, means, and methods for the transformation of data in order to hide their semantic content, prevent their unauthorized use, or prevent their undetected modification. [ANSDIT]