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Asymmetric Key
A form of cryptography that does not use symmetric keys. It either uses complex formulas to solve problems (such as Diffie-Hellman to generate/exchange symmetric keys) or uses key pair sets to provide digital signatures and digital envelopes. This latter form is also known as public key cryptography.
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A key exchange algorithm useful in situations in which two parties might need to communicate with each other but they have no physical means to exchange key material and there is no public key infrastructure in place to facilitate the exchange of secret keys.
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A subset of asymmetric cryptography based on the use of a key pair set consisting of a public key and a private key. Messages encrypted with one key from the pair can be decrypted only with the other key from the same pair.
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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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The explanation of how the mathematical principles behind the Diffie–Hellman key exchange algorithm could be extended to support an entire public key cryptosystem used for the encryption and decryption of messages.
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A method of performing a cryptographic transformation (. See cryptography) on a data unit. Cryptographic algorithms may be based on symmetric key methods (the same key is used for both encipher and decipher transformations) or on asymmetric keys (different keys are used for encipher and decipher transformations).
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