Hacker News with Generative AI: Hash Functions

Procedural Textures with Hash Functions (douglasorr.github.io)
I'm the sort of person who gets very excited when simple rules create complex behaviour. The other day, I needed a simple hash function that maps $(x, y)$ coordinates to a colour, and found a straightforward equation that ended up being astoundingly rich. Hence this post; to talk about and play with this function.

Procedural Generation, Computer Graphics, Hash Functions

32 points by douglasorr 12 days ago | 5 comments

Entropy Attacks (cr.yp.to)
The conventional wisdom is that hashing more entropy sources can't hurt: if H is any modern cryptographic hash function then H(x,y,z) is at least as good a random number as H(x,y), no matter how awful z is. So we pile one source on top of another, hashing them all together and hoping that at least one of them is good.

Cryptography, Security, Entropy, Hash Functions

102 points by todsacerdoti 32 days ago | 32 comments

Questioning the Criteria for Evaluating Non-Cryptographic Hash Functions (cacm.acm.org)
Computing practitioners encounter hash functions almost every day, although they may not necessarily be the center of attention.

Hash Functions, Computer Science, Cryptography

47 points by todsacerdoti 72 days ago | 9 comments

ChibiHash: Small, Fast 64 bit hash function (nrk.neocities.org)
If you need a small and fast 64 bit hash function that can be copy-pasted easily, then here's one that I cooked up in an hour or so: chibihash64.h.

Cryptography, Algorithms, Programming, Hash Functions, Code

104 points by thunderbong 159 days ago | 31 comments

ChibiHash: Small, Fast 64 bit hash function (nrk.neocities.org)
If you need a small and fast 64 bit hash function that can be copy-pasted easily, then here's one that I cooked up in an hour or so: chibihash64.h.

Hash Functions, Programming, Software, Algorithms

4 points by bratao 160 days ago | 0 comments

Breaking CityHash64, MurmurHash2/3, wyhash, and more (orlp.net)
Hash functions are incredibly neat mathematical objects. They can map arbitrary data to a small fixed-size output domain such that the mapping is deterministic, yet appears to be random.

Cryptography, Hash Functions, Security, Performance

50 points by fanf2 174 days ago | 23 comments

Questioning the Criteria for Evaluating Non-Cryptographic Hash Functions (queue.acm.org)
Computing practitioners encounter hash functions almost every day, although they may not necessarily be the center of attention.