CAIN-42 CAIN StudioCAIN Byzantine Trust Fabric Engineer
Explain PBFT, operate a 4-replica cluster, read quorum certificates, and run honest soak tests.
Who it's for
Distributed-systems and SRE engineers who operate consensus clusters.
Why it's in demand
A niche but valuable skill: few teams can build and operate Byzantine fault-tolerant notarization. It underpins tamper-proof audit logs for regulated AI. Sources →
Exam
- Requires your Novice certificate ID
- 20 questions · 30 minutes
- 85% (17/20) to pass · server-graded
- Certificate ID C42-CBTF-…
Modules
1Byzantine faults and the 3f + 1 rule13 min✓2Quorum certificates and offline receipts12 min✓3Operating a multi-region cluster14 min✓4Soak tests and honest verdicts12 min✓5Latency, data planes and trade-offs11 min✓
Built on this code
deploy/multi-region/deploy/multi-region/pbft_multi_region_probe.pyplatform-gateway/cain_trust_kernel.pyscripts/cain42_bft/scripts/cain42_bft/verify_pbft_qc_bundle.pyscripts/cain42_bft/verify_qaas_receipt.py