Individual skill

ctf-key-recovery

Reconstruct CTF key, serial, and flag verifiers using known plaintext, repeating XOR, encoded constants, bytecode replacement, hash constraints, SMT, and bounded brute force. Use when a reverse challenge requests a key or serial and the verifier or encrypted target bytes can be recovered statically or dynamically.

skills/ctf-key-recovery/SKILL.md

Source commit b9eb545926ede5f24adeb0d7e60d97ee73b409f7

What was checked

Matches the observed repository HEAD

Yes

Scanner rules are current

No

Repository scan complete

No

Skill scan complete

Yes

Observed behavior

Not checked yet

Last checked

Nov 11, 2026

These are observations at the recorded commit, not a guarantee of safety. Review the source before running it.

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