PNG and Hidden Pixels

Re:PNG and Hidden Pixels by fenomas on Tuesday September 01, 2020 @04:34AM (#24339666)

Sorry if this is a dumb question, but what does hiding information in images have to do with CTF-style challenges? Does that term not refer to "break into server X and retrieve file Y" sorts of tasks?

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Re:PNG and Hidden Pixels by marcan_42 on Tuesday September 01, 2020 @05:16AM (#24339864)

CTF games come in two styles (attack and defense i.e. PvP, and jeopardy i.e. PvE), and within the jeopardy class there are many categories, one or which can be steganography, file formats, and related challenges.

(Source: I run a CTF, have written over 100 challenges, and the JPEG padding trick was one of them years ago)

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Re:PNG and Hidden Pixels by fenomas on Tuesday September 01, 2020 @12:08PM (#24343323)

Ah, I had thought they were exclusively about security/penetration/etc. Thanks!

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