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   lcamtuf :verified: :verified: :verified: (lcamtuf@infosec.exchange)'s status on Wednesday, 15-Jul-2026 14:22:28 JST lcamtuf :verified: :verified: :verified:

   Idle thought: you can have progressive JPEGs in which coefficients for lower-frequency components are sent first and the detail is refined as more data arrives.

   I'm sure you can abuse this to construct a *regressive* JPEG that looks good with the initial low-frequency data and then degrades into something terrible.

   • Embed this notice
     Ryan Castellucci (they/them) :nonbinary_flag: (ryanc@infosec.exchange)'s status on Wednesday, 15-Jul-2026 14:22:28 JST Ryan Castellucci (they/them) :nonbinary_flag:

     in reply to

     @lcamtuf and you're going to implement a demonstration? 🍿