Please note that "HMAC" is a specific construction of a MAC (from a hash function), and most of your description applies to MACs in general. If we use HMAC-SHA3 or HMAC-SHA512-384, the length …

Note that HMAC is a specific scheme as Seth correctly describes; SHA-3 uses KMAC which is therefore another hash based MAC. Maybe the acronyms CBMAC and HBMAC could be used for Cipher …

That said, the construct of HMAC-SHA1 is still considered safe to use (assuming a secret key) due to the security proof for HMAC which does not rely on collision resistance of the underlying PRF.

Following on the heels of the previously posted question here, Taxonomy of Ciphers/MACs/Kex available in SSH?, I need some help to obtain the following design goals: Disable any 96-bit HMAC …

I was reading HMAC on wikipedia and I was confused about a few points. Where do I use HMAC? Why is the key part of the hash? Even if someone successfully used a "length-extension attack", how …

HMAC may be used instead of a raw hash function to strengthen a password-verification system, but in a different setup. Given a system which checks passwords with salts and iterated hash functions, …

I am looking at ways to secure http communication using HMAC. My understanding is that in this scenario the client and the server both know a secret. This means the secret must be first generated...

An HMAC function is designed to verify message integrity, i.e., that the message has not been tampered with. It is generally (always?) implemented by using a hashing function H, and calculating the...

HMAC is a Message Authentication Code, which is meant for verifying integrity. This is a totally different kind of beast. However, it so happens that HMAC is built over hash functions, and can be considered …

When receiving a registration request, first verify the HMAC (by recomputing it), then (and only then) proceed to the decryption step. Of course, all of this assumes that there is a key K, that your client …