Search results
Results from the WOW.Com Content Network
Informally, a message authentication code system consists of three algorithms: A key generation algorithm selects a key from the key space uniformly at random. A MAC generation algorithm efficiently returns a tag given the key and the message. A verifying algorithm efficiently verifies the authenticity of the message given the same key and the tag.
Message authentication or data origin authentication is an information security property that indicates that a message has not been modified while in transit (data integrity) and that the receiving party can verify the source of the message. [1] Message authentication does not necessarily include the property of non-repudiation. [2] [3]
Email authentication, or validation, is a collection of techniques aimed at providing verifiable information about the origin of email messages by validating the domain ownership of any message transfer agents (MTA) who participated in transferring and possibly modifying a message.
In the early 1990s, the NPL developed three formal specifications of the MAA: one in Z, [11] one in LOTOS, [12] and one in VDM. [13] [14] The VDM specification became part of the 1992 revision of the International Standard 8731-2, and three implementations were manually derived from that latter specification: C, Miranda, and Modula-2. [15]
Such message protocols should not be confused with various other algorithms which use 3 passes for authentication. It is called a three-pass protocol because the sender and the receiver exchange three encrypted messages. The first three-pass protocol was developed by Adi Shamir circa 1980, and is described in more detail in a later section. The ...
The Horton principle becomes important when using message authentication codes (or MACs) in a cryptographic system.Suppose Alice wants to send a message to Bob, and she uses a MAC to authenticate a message m that was made by concatenating three data fields, where m := a || b || c.
Message authentication code; Keyed-hash message authentication code. Encrypted CBC-MAC (EMAC) – NESSIE selection MAC; HMAC – NESSIE selection MAC; ISO/IEC 9797-1, FIPS PUB 113 and IETF RFC; TTMAC – (Two-Track-MAC) NESSIE selection MAC; K.U.Leuven (Belgium) & debis AG (Germany) UMAC – NESSIE selection MAC; Intel, UNevada Reno, IBM ...
Copies the Authentication-Results field into a new AAR field (starting with i=1) and prepends it to the message. Calculates the AMS for the message (with the AAR) and prepends it to the message. Calculates the AS for the previous Arc-Seal headers and prepends it to the message. To validate an ARC, the recipient performs the following steps: