Perfect forward secrecy

A secret value that is used to encrypt or decrypt messages and is kept secret and known only to the user; used in conjunction with a public key in asymmetrical cryptography. The private or secret key of a key pair, which must be kept confidential and is used to decrypt messages encrypted with the public key, or to digitally sign messages, which can then be validated with the public key.
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A value that is used to encrypt or decrypt messages and is made public to any user and used with a private key in asymmetric cryptography. In an asymmetric cryptography scheme, the key that may be widely published to enable the operation of the scheme. Typically, a public key can be used to encrypt, but not decrypt, or to validate a signature, but not to sign.
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A parameter used with a cryptographic algorithm to transform, validate, authenticate, encrypt, or decrypt data. Cryptographic keys provide the “secret” portion of a cryptographic algorithm used to encrypt and decrypt data.
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An attack in which the attacker has the ability to decrypt chosen portions of the cipher-text message.
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An encryption scheme where two pairs of algorithmic keys (one private and one public) are used to encrypt and decrypt messages, files, etc.
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