Applied Cryptanalysis
Break the crypto the textbooks told you was safe.
About this exam
A specialist credential for attacking real-world cryptographic mistakes: oracle attacks, weak modes, hash abuse, and nonce reuse. Recover plaintext and forge tokens.
Skills verified
How the exam works
- 1Start when you're ready
The clock starts the moment you begin and keeps running even if you close the tab — there's no pause.
- 2Capture 4 of 5 labs
Open each lab, exploit it, and submit the flag it gives you. Solve any 4 within the 3-hour limit to pass.
- 3Proctored for integrity
Leaving the exam tab is recorded and factored into an integrity score printed on your credential — the pass has to mean something.
- 4Earn a verifiable credential
Pass and we mint a signed credential with a public verify page and a shareable certificate — provable, not self-reported. Plus +600 XP.
- 5Miss it? Cooldown, then retry
If you don't reach the threshold, a short cooldown applies before you can retake — so the credential stays meaningful.
Exam labs (5)
Solve any 4 of these 5 to pass. Once you start, the clock runs even if you close the tab.