02 / Field notes
Beyond the flag.
The interesting part is how you get there. Technical notes on the reasoning, experiments and discoveries behind a solve.
6 articles · newest first
Web2 MIN READ
Dacia Lab · sample exercises
Following a duplicated parameter across a trust boundary, one parser at a time.
HTTPAuthenticationParsing
500 ptsmediumSample article
Reverse1 MIN READ
Dacia Lab · sample exercises
Turning a small byte transformation into a clear, testable model.
Static analysisPythonBytes
300 ptseasySample article
Crypto1 MIN READ
Dacia Lab · sample exercises
Why a shared factor is enough to unravel two toy RSA moduli.
RSANumber theoryPython
450 ptsmediumSample article
Pwn1 MIN READ
Workshop · sample exercises
Making an off-by-one boundary visible with a minimal local harness.
CMemory safetyBoundaries
250 ptseasySample article
Forensics1 MIN READ
Workshop · sample exercises
Reconstructing a sequence from synthetic logs without losing provenance.
LogsTimelinePython
200 ptseasySample article
Misc1 MIN READ
Workshop · sample exercises
A tiny property check that makes an encoding contract explicit.
EncodingTestingPython
150 ptseasySample article
No writeups match these filters. Try another topic or reset the filters.