$ cat writeup.md…
$ cat writeup.md…
bug-makers
Task: a 1000x1000 PNG that hides data in custom ancillary chunks rather than pixels. Solution: enumerate all PNG chunks, find 100 private pTNN chunks scattered around IDAT, reassemble them in numeric order to recover flag instructions split across chunks 49, 50, 76 and 99.
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$sign in$ grep --similar