Questions tagged [siphash]
A fast 64-bit PRF that can be used as a MAC
10
questions
1
vote
0answers
49 views
Using cryptography to protect database integrity
I'm designing a micro-services system where each service manages some set of entities (User, Account, e.g).
I want to be able to verify the authenticity of entity identifiers (e.g User-Id and Account-...
1
vote
0answers
58 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 ...
4
votes
1answer
2k views
SipHash's (non-)collision resistance
I'm very new to cryptography, and I need help understanding the security claims made in Aumasson and Bernstein's paper on the SipHash. In particular, I'm trying to understand the following statement ...
2
votes
0answers
221 views
Why is Siphash-128 considered "experimental"?
Why is Siphash-128 still considered "experimental"? What does this mean?
4
votes
2answers
636 views
Same 64-bit preimage resistance security for SipHash and SHA-512/64?
If I have to chose a 64 bit preimage resistant hash function; will there be any difference in security between
SipHash and
SHA-512/64 (SHA-512 truncated to 64 bits)?
How long will it take an ...
3
votes
2answers
829 views
Cryptanalysis of Marvin32 compared to SipHash
So I am curious about the security analysis of Marvin32, the randomized hash algorithm used in .NET (to prevent hash-table DoS). I found the source code here: ...
3
votes
1answer
300 views
Does SipHash have 64 bit (second) preimage security?
I was not able to find an explicit statement about the first and second preimage security of SipHash-2-4 or SipHash-4-8 anywhere.
I think it should be 64 bits, but I'd feel safer if somebody who has ...
13
votes
2answers
3k views
Is SipHash cryptographically secure?
I'm evaluating different hash algorithms for use in my application. One of the kind of algorithms I am looking at are cryptographically secure ones to protect against DOS attacks.
SipHash seems ...
3
votes
2answers
3k views
Generate a unique 64 bit numeric database key without collisions at $2^{32}$ birthday threshold?
What is the best way to generate a unique 64 bit numeric database key from a string?
For example: if the string is a URL, you could generate a 64 bit key using SipHash or by truncating a SHA256 hash ...
3
votes
1answer
771 views
A fast non-cryptographic hash function that is "strong enough"?
I'm designing a simple one-time-password mechanism for authentication against a possibly-insecure server - i.e. I don't want to use symmetric shared secrets.
The first idea that came into mind was ...
