Initially the Hash Message Authentication Code (HMAC) of the original image is computed using the iterative cryptographic hash function MD5 (Message-Digest algorithm 5).
What does MAC stand for?
MAC stands for Message Authentication Code
This definition appears very frequently and is found in the following Acronym Finder categories:
- Information technology (IT) and computers
See other definitions of MAC
We have 1134 other meanings of MAC in our Acronym Attic
- Medicare Administrative Contractor
- Mediterranean Air Command (WWII)
- Medium Access Control
- Medium Access Controller
- Members Advisory Committee (various organizations)
- Membership Advisory Council (various organizations)
- Membrane Attack Complex
- Memory Access Controller
- Memory and Aging Center
- Men's Advisory Counsel/Committee (prisons)
Samples in periodicals archive:
Support is included for 3DES and digital signatures using Hashed Message Authentication Codes Message Digest (HMACMD5) and Secure Hashing Algorithm (HMA SHA-l).
This could include biometric authentication, message authentication codes, public key authentication schemes and even the typed name at the end of an e-mail.
The standard divides the key agreement process into the following major components: 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.
Acronyms and Abbreviations AH Authentication Header BITS Bump in the Stack BITW Bump in the Wire CPU Central Processing Unit DES Data Encryption Standard ESP Encapsulating Security Payload HMAC Hashed Message Authentication Code IDEA Internet Development and Exchange Association IDS Intrusion Detection System IETF Internet Engineering Task Force IPSec Internet Protocol Security ISP Internet Service Provider KMAC Keyed Message Authentication Code MAC Message Authentication Code NIC Network Interface Card PKI Public Key Infrastructure SA Security Association SPD Security Policy Database TCP/IP Transmission Control Protocol/Internet Protocol VPN Virtual Private Network
The original packet may be 1,490 bytes, however, it increases to 1,544 bytes after new IP and Encapsulating Security Payload (ESP) headers, trailer information, and Message Authentication Code (MAC) value are added as called out in IPSec.