CAIN-42 CAIN StudioCAIN Evidence & Forensics Verifier
Verify hash chains, Merkle proofs and signatures offline, grade evidence strength, and spot tampering.
Who it's for
DFIR analysts, auditors and engineers who must check signed AI evidence.
Why it's in demand
As AI decisions face audits, disputes and incident response, organisations need people who can verify machine evidence independently instead of trusting a vendor dashboard. Sources →
Exam
- Requires your Novice certificate ID
- 20 questions · 30 minutes
- 85% (17/20) to pass · server-graded
- Certificate ID C42-CEFV-…
Modules
1Hash chains in practice12 min✓2Merkle trees and inclusion proofs (RFC 6962)14 min✓3Signatures, pinned keys and key swaps12 min✓4Independent (clean-room) verification11 min✓5Grading facts: observed, verified, derived, unverified, counterfactual11 min✓
Built on this code
cain/passport.pycain/worm_export.pykeystone/family.pykeystone/family_verify.pyscripts/cain42_bft/