Function seahash::hash_seeded

pub fn hash_seeded(buf: &[u8], a: u64, b: u64, c: u64, d: u64) -> u64

Hash some buffer according to a chosen seed.

This is the keyed version of SeaHash, which allows chosing a seed defining the hash function. It is generally suspected that this is at least partially secure (i.e. you cannot deduce the seed, even with unlimited "black box" access to the function), but it has not yet been subject to proper cryptoanalysis.

The keys are expected to be chosen from an uniform distribution.

Known attacks/weaknesses

Following attacks and weaknesses might be exploited by a malicious party:

• An attacker can obtain the XOR of the keys through reverting the diffusion in the hash of the empty string. It is unknown if this information can be used to generate collisions.
• Certain keys are weaker than others when hashing small buffers.

It shouldn't be considered as strong as e.g. SipHasher as of the current design.