3 ms·
Angle brackets are traditionally used for actual quotes. > Step one, break cryptographically secure hashing system These "perceptual hashes" are not (and cann
by Hizonner 3y ago
Angle brackets are traditionally used for actual quotes.
> Step one, break cryptographically secure hashing system
These "perceptual hashes" are not (and cannot be) cryptographically secure, and practical collision attacks have been tested and published. Did you actually read the main article at all?
I don't think I'm even going to bother with the rest.
- grayhatter 3y agoPhotoDNA doesn't use CS hashes, but others I've looked at do use them. But you're right, you probably don't wanna respond to my parody of you suggestion to trade in CSAM...
- sterlind 3y agoYou're saying that there are cryptographically-secure PhotoDNA-like hash algorithms? That's remarkable, if true, though I'm not sure if the schemes you're referring to are resistant to preimage recovery or hash collision (different things!)
- grayhatter 3y agoI dont want to oversell it, having really only seen what I might consider marketing material... I'm pretty sure they're only using a CS hash for the database, where the photo hash is similar to photodna, and they're only adding some indirection. My assumption was something like sha_something(photodna(image))