Questions tagged [kmac]
KMAC or Keccak Message Authentication Code is a proposed MAC based on the SHA-3 hash.
8
questions
0
votes
0
answers
36
views
What is the difference between HMAC-SHA3-512 and KMAC? [duplicate]
Reading through the wikipedia entry for HMAC I see that SHA-3 can be used with the HMAC algorithm to give HMAC-SHA3-512.
I also know that there is KMAC, which from ...
- 133
4
votes
1
answer
323
views
Is KMAC just SHA-3-256(KEY || message)
According to keccak strengths you have:
Unlike SHA-1 and SHA-2, Keccak does not have the length-extension weakness, hence does not need the HMAC nested construction. Instead, MAC computation can be ...
- 444
2
votes
1
answer
45
views
Can you use a dynamic key and data size for KMAC?
I've asked before if some kind of canonical encoding should be used on the input parameters of SHA-3 before it could be used as replacement for HMAC.
However, if I read the current NIST specifications ...
- 85.1k
1
vote
1
answer
224
views
Recommended Shake256 digest size for KMAC based HKDF
On the wiki page for HKDF, in the Python Implementation, there is a hash_length variable for the ...
- 593
1
vote
0
answers
62
views
Parallel MAC vs doubled rounds for SipHash, KMAC and others
SipHash 4-8 is documented by the authors as being about half the speed of SipHash 2-4 and is obviously the more conservative option.
I was wondering from a security perspective how this would compare ...
- 324
2
votes
0
answers
177
views
Using NIST constructions based on Keccak like cSHAKE128 for other sponges
NIST defines a lot of interesting applications of sponges in FIPS 202 and NIST SP 800-185 like the XOF cSHAKE128 or the MAC scheme KMAC.
All this schemes come with a security guarantee and are ...
- 2,458
10
votes
2
answers
4k
views
Should I use HMAC or KMAC for SHA3?
I am planning to implement a MAC function for the SHA3. I read that its latest variant is KMAC. I am confused by the comments in the http://keccak.noekeon.org/
website.
Its says...
Unlike SHA-1 and ...
- 101
5
votes
1
answer
821
views
Equivalent security of KMAC and different HMAC instances?
In the August 2016 draft of SP 800-185, SHA-3 Derived Functions (pdf) there is a table for equivalent security settings for KMAC, the MAC derived from SHA-3, and some previous MACs (Table 1 on pages ...
- 31.3k