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Symmetric-key algorithm

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  • Symmetric-key algorithm — Symmetric key algorithms are a class of algorithms for cryptography that use trivially related, often identical, cryptographic keys for both decryption and encryption.The encryption key is trivially related to the decryption key, in that they may …   Wikipedia

  • Key generation — is the process of generating keys for cryptography. A key is used to encrypt and decrypt whatever data is being encrypted/decrypted.Modern cryptographic systems include symmetric key algorithms (such as DES and AES) and public key algorithms… …   Wikipedia

  • Key size — In cryptography, key size or key length is the size measured in bits[1] of the key used in a cryptographic algorithm (such as a cipher). An algorithm s key length is distinct from its cryptographic security, which is a logarithmic measure of the… …   Wikipedia

  • Key (cryptography) — In cryptography, a key is a piece of information (a parameter) that determines the functional output of a cryptographic algorithm or cipher. Without a key, the algorithm would produce no useful result. In encryption, a key specifies the… …   Wikipedia

  • Key authentication — is a problem that arises when using public key cryptography. It is the process of assuring that the public key of person A held by person B does in fact belong to person A .In traditional symmetric key cryptography, this problem wasn t an issue… …   Wikipedia

  • Key exchange — is any method in cryptography by which cryptographic keys are exchanged between users, allowing use of a cryptographic algorithm. If Alice and Bob wish to exchange encrypted messages, each must be equipped to decrypt received messages and to… …   Wikipedia

  • Key Wrap — constructions are a class of symmetric encryption algorithms designed to encapsulate (encrypt) cryptographic key material. The Key Wrap algorithms are intended for applications such as (a) protecting keys while in untrusted storage, or (b)… …   Wikipedia

  • Key encapsulation — mechanisms (KEMs) are a form of encryption algorithm designed to secure cryptographic key material. Key encapsulation constructions are typically asymmetric (public key) algorithms, although an equivalent symmetric notion is referred to as Key… …   Wikipedia

  • Public-key cryptography — In an asymmetric key encryption scheme, anyone can encrypt messages using the public key, but only the holder of the paired private key can decrypt. Security depends on the secrecy of that private key …   Wikipedia

  • Diffie–Hellman key exchange — (D–H)[nb 1] is a specific method of exchanging keys. It is one of the earliest practical examples of key exchange implemented within the field of cryptography. The Diffie–Hellman key exchange method allows two parties that have no prior knowledge …   Wikipedia

  • International Data Encryption Algorithm — IDEA An encryption round of IDEA General Designers Xuejia Lai and James Massey …   Wikipedia