2014年4月22日 · If you need to both encrypt and MAC, then the smart thing to do is not HMAC or CMAC, but rather to use an authenticated encryption mode which will do both properly, simultaneously, and at a lower cost (or at least so it is hoped).

2023年4月30日 · HMAC and CMAC are both cryptographic constructs used for message authentication, but they differ in their construction, underlying functions (hash vs. block cipher), security properties, performance, and applicability.

2017年4月13日 · HMAC is a recipe for turning hash functions (such as MD5 or SHA256) into MACs. So HMAC-MD5 and HMAC-SHA256 are specific MAC algorithms, just like QuickSort is a specific sorting algorithm.

2024年10月26日 · Overall, HMAC is simpler and faster than CMAC. It is normally the best choice for varying lengths of messages and for different key sizes. CMAC, though, is possibly better at...

2024年5月25日 · Overall, HMAC is simplier and faster than CMAC. It is normally the best choice for varying lengths of messages, and for different key sizes. CMAC, though, is possibly better in...

2021年10月16日 · In most cases HMAC will work best, but CMAC may work better where there is embedded hardware which has hardware accelleration for block ciphers. For this, CMAC would likely run faster than HMAC.

2017年1月4日 · Currently, there are three (3) approved * general purpose MAC algorithms: HMAC, KMAC and CMAC. NIST SP 800-224, Keyed-Hash Message Authentication Code (HMAC): Specification of HMAC and Recommendations for Message Authentication (Initial Public Draft) was released for public comment on June 28, 2024.

2016年1月13日 · A similar question as been asked before: Use cases for CMAC vs. HMAC? To resume it, AES-CMAC is a MAC function. It can be seen as a special case of One-Key CBC MAC1 (OMAC1) which also a MAC function that relies on …

HMAC uses a hash algorithm to provide authentication. It is usually quite fast. CMAC on the other hand uses a block cipher in CBC mode, making it a lot slower.