Conversely, MAC algorithms are designed to produce matching MACs only if the same message, secret key and initialization vector are input to the same algorithm.
Message digest algorithms are created such that a given message will always produce the same message digest assuming the same algorithm is used to generate both. This lack of security means that any message digest intended for use gauging message integrity should be encrypted or otherwise be protected against tampering. However, some authors use MIC to refer to a message digest, which is different from a MAC – a message digest does not use secret keys. The term message integrity code (MIC) is frequently substituted for the term MAC, especially in communications, to distinguish it from the use of MAC meaning MAC address (for media access control address). This is commonly done in the finance industry.
However, non-repudiation can be provided by systems that securely bind key usage information to the MAC key the same key is in the possession of two people, but one has a copy of the key that can be used for MAC generation while the other has a copy of the key in a hardware security module that only permits MAC verification. Thus, digital signatures do offer non-repudiation. Since this private key is only accessible to its holder, a digital signature proves that a document was signed by none other than that holder. In contrast, a digital signature is generated using the private key of a key pair, which is public-key cryptography. For the same reason, MACs do not provide the property of non-repudiation offered by signatures specifically in the case of a network-wide shared secret key: any user who can verify a MAC is also capable of generating MACs for other messages. This implies that the sender and receiver of a message must agree on the same key before initiating communications, as is the case with symmetric encryption. You can see those dates below.MACs differ from digital signatures as MAC values are both generated and verified using the same secret key. Hey, worked for Drake, right?Īlong with the soundtrack, Snoop and Wiz will be heading out on a mini-U.S. In typical fashion-forward thinking, the uncool version of the Wiz kid sports chinos and a drab dress shirt, while Snoop's decked out in a dope varsity jacket. It's just about - Snoop's the cool guy in school and I'm kind of the nerd." Khalifa dished some story details to Billboard last June, explaining, "It's a great buddy film. You can stream that cut below and check out the album art above.Īs for the film, the plot supposedly centres on a studious Khalifa getting life lessons from the ladies-lovin' Snoopy D. The tracklisting is still MIA, but it will feature "Young, Wild and Free," the bouncy, pro-weed pop-rap jam that also features Bruno Mars. Fittingly, the rappers will drop new material for the flick's soundtrack too.īillboard reports that while the film has yet to get its street date, the collaborative collection will arrive December 13. Considering Snoop Dogg turned 40 last month, it's been a good couple of decades since the pimped-out rapper left Long Beach Polytechnic High School, but next month the hip-hop icon will make his way back to classes with Wiz Khalifa by his side in the upcoming comedy Mac and Devin Go to High School.