This standard@ specifies schemes for the agreement of symmetric keys using Diffie-Hellman and MQV algorithms. It covers methods of domain parameter generation@ domain parameter validation@ key pair generation@ public key validation@ shared secret value calculation@ key derivation@ and test message authentication code computation for discrete logarithm problem based key agreement schemes. These methods may be used by different parties to establish a piece of common shared secret information such as cryptographic keys. The shared secret information may be used with symmetrically-keyed algorithms to provide confidentiality@ authentication@ and data integrity services for financial information@ or used as a key-encrypting key with other ASC X9 key management protocols.