>>228638

The "randomly generated hash" by 8chan is just the SHA256 of the file contents. Someone saved the file off 8chan, then re-posted it unmodified i.e. same SHA256 hash.

>>228712

>>228698

We ran into this the other night with Q's flag. Seems 8chan may re-compress files after posting. Not sure when this change took effect. The generated "random" name is the SHA256 of the file as uploaded, not necessarily of the re-compressed file.

>>228813

Here's the best example I have…

Run a SHA256 of the flag Q posted first time.

archive.4plebs. org/pol/thread/149158110/#149160361

Now check "random" file name of recent post.

>>>/greatawakening/79

You'll see the SHA256 of the original matches the "random" name of the second.

However… if you run the SHA256 hash of the second image, you'll see it has changed, presumably because 8chan uses maximum compression (because PNG is lossless).