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File: 1753068850672840.png (1 KB, 101x62)
1 KB PNG
What's up with pixiv filenames seemingly randomly changing from the original 145954923_p0 (random front page pic) format to a way longer hash? Via google I found someone say that it's mostly loli and other r18 content getting hit with the change, which seems to be true. Clicking a bit through the sfw section which I normally never use and all I can find is the old format. Should I be concerned about pixiv somehow fucking with r18 pics to fingerprint you or something? It feels pretty weird.
>>
I very much doubt it's fingerprinting, too easy to change the filename and usually it gets changed when uploading elsewhere anyway.

Could be related to image revisions, or some A-B testing that needs to affect how things are getting cached. I haven't seen any evidence that the files themselves are getting tampered with so I doubt it's anything malicious.
>>
>>8898485
The fact that it disproportionally affects possibly questionable r18 content and that it retroactively changed the filenames of old pictures (this fucked my flow of trying to download a pic to check if I had it already saved, and also rules out the change being related to image revisions) makes me think there's something weird going on here. I was just surprised to find no discussion about this anyhwere outside of 1 dead reddit thread.
>>
Yeah I've actually tried and every single Tanya pic I try to download has the new file format, while before when I was just checking bookmarked artists every few days it was 50:50. It seems like it either applies to loli content specifically or has some other weird criteria, but in any case, I don't think this is going to be anything benign..
>>
I don't know, it's happened to me twice for a few days and then weeks of not happening in between, loli or not. A similar thing with something switching back and forth a few times happened years back when they were A-B testing their current site design.

Might have to do with a move to content-addressable distributed storage, for which they can't use the current filenames, because those don't change when a pic is updated. Or maybe servers are getting moved to a new system one by one and during the move they need to disambiguate the filenames.
>>
it's a small consolation but at least possible to reverse the embedded hash so the filename is just the artwork id by removing everything between the - and _
eg:
>picrel's filename is 141863128-1c5293133b8225465a2e60891a874b4c_p0.jpg
>"short" filename should be 141863128_p0.jpg



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