Message authentication definition

Message authentication means a security measure designed to establish the authenticity of a message by means of an authenticator within the transmission derived from certain predetermined elements of the message itself.
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Message authentication means a short piece of imbedded code used to prove the integrity and authenticity of a transmission packet.
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Examples of Message authentication in a sentence

  • Message authentication and digital signature use HMAC and RSA-1024 on SHA256 hash function respectively.

  • Message authentication in VANETs is based on public key infrastructure (PKI) where a certificate authority (CA) is responsible for issuing, manage, distribute and revoke certificates [2].

  • Message authentication codes (MACs) are symmetric key primitives that allow parties sharing a secret key k to authenticate and verify messages, thus detecting eventual modification of their content.

  • Message authentication, maintaining privacy, confidentiality, non-repudiation and information integrity are all basic security requirements in a typical communication network.

  • Formally: Definition 3 Message authentication code (Mac, Vrfy) is a δ-secure one-time MAC if for any ad- versary A and any message M , the probability that the following experiment outputs “success” is at most δ: Choose uniform key SK; let t = MacSK(M ); let (Mj, tj) ← A(t); output “success” if Mj M and VrfySK(Mj, tj) = 1.

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