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by KMag 1830 days ago
How do you read a timer from within the JPEG XL bitstream? I believe the decoding process is deterministic.
1 comments
slver 1830 days ago
It's a challenge, but I'd probably look into any decoders that parallelize the decoding and see if I can abuse this.
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wizzwizz4 1830 days ago
You'd need to exploit an implementation bug, or have the user be streaming or something (so some squares appear before others as the output of your timing attack).
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tsegratis 1830 days ago
Just wait, its only a short while til JPEG contains the pdf spec and a javascript interpreter
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