Asymmetric Encryption	Encryption were the message is encrypted and decrypted using a pair of keys.
Certificate	A digitally signed statement that contains information about an entity and the entity's public key, thus binding these two pieces of information together.
Certificate Authority (CA)	An entity entrusted to issue certificates asserting that the recipient individual, machine or organization requesting the certificate fulfills the conditions of an established policy.
Cipher-Text	Text which has been encrypted.
Cipher	A cryptographic system in which units of plain text of regular length, usually letters, are arbitrarily transposed or substituted according to a predetermined code.
Cryptography	A study of techniques and applications of encryption.
Decrypt	To decipher or decode a message.
Digital Signature	The digital equivalent of an authentic, handwritten signature.
Encrypt	To alter (a file, for example) using a secret code so as to be unintelligible to unauthorized parties.
GCHQ	Government Communications Headquarters. http://www.gchq.gov.uk/
MIT	Massachusetts Institute of Technology. http://web.mit.edu/
NSE	Non Secret Encryption.
PKE	See Public Key Encryption
Pretty Good Privacy (PGP)	A program, developed by Phil Zimmerman, that uses cryptography to protect files and electronic mail from being read by others.
Private Key	In Public Key Encryption, this key is kept private.
Public Key	In Public Key Encryption, this key is made available.
Public Key Encryption	An asymetric method of encoding data where one of the keys is made public and the other is kept private.
Quantum Computer	An immensely powerful computer that exploits quantum theory, in particular the theory that an object can be in many states at once.
Qubit	A quantum bit.
RSA	An encryption and authentication system that uses an algorithm developed in 1977 by Ron Rivest, Adi Shamir, and Leonard Adleman.
Secure Shell	A completely encrypted shell connection between two machines.
Secure Sockets Layer (SSL)	The Secure Sockets Layer (SSL) protocol is a strong authentication system which provides confidentiality, integrity, and optionally authentication at the transport level.
S-HTTP	An extension to HTTP which allows secure (encrypted) data transmissions over the world wide web.
Symmetric Encryption	Encryption were the message is encrypted and decrypted using the same key.
Verisign	A leading provider of Public Key Infrastructure. http://verisign.com/