The seal is the evidence.
Verdict's product is cryptographic integrity. Our security posture is therefore existential, not competitive. This page documents architecture, certifications, sub-processors, and disclosure policy. If you are a CISO evaluating Verdict, this is the page your team will demand.
── Certifications & Conformance ──
── Cryptographic Architecture ──
- Hash functionSHA-256 (FIPS 180-4) — content-addressed events
- Tree structureRFC 6962 Merkle tree — one root per evidence batch
- SigningEd25519 (RFC 8032), keys in AWS CloudHSM (FIPS 140-2 Level 3) — production-tenant signing tier. Public demo surfaces use an ephemeral ECDSA P-256 key per request (see note below).
- Transparency logSigstore Rekor — every Merkle root anchored publicly
- Per-tenant chainprior_root linkage — tampering one record invalidates all subsequent records for that tenant
- RedactionHash-preserving — payload removable, Merkle proof intact
- Key rotationQuarterly Ed25519 keypair rotation; old keys archived in HSM for verification only
- Time anchoringRoughtime + Rekor timestamp tokens (RFC 3161 compatible)
Tiered signing. The public live demo at /live-seal and the public MCP sandbox at /api/mcp sign with an ephemeral ECDSA P-256 / SHA-256 keypair generated per request, for live Sigstore Rekor anchoring. The Ed25519 + FIPS 140-2 Level 3 HSM signing described above is the production-tenant tier. The Sealed Evidence Record format and Rekor anchoring are identical across both tiers; only the signing key tier differs.
── Sub-Processors ──
| Sub-processor | Purpose | Region |
|---|---|---|
| Vercel | Edge hosting + CDN | Global |
| Supabase | Postgres + storage | us-east-1, eu-west-1 |
| AWS KMS / CloudHSM | Ed25519 HSM signing | us-east-1 |
| Sigstore Public Good | Rekor transparency log anchoring | Global |
| Resend | Transactional + audience email | us-east-1 |
── Vulnerability Disclosure ──
We treat security disclosures with extreme seriousness. Our product is cryptographic integrity; if that integrity can be broken, we want to know first.
- EMAILsecurity@verdict.systems
- PGP/security.txt (RFC 9116 conforming)
- SLATriage within 24 hours; remediation timeline communicated within 7 days
- HALL OF FAMEPublic acknowledgment for valid reports (with researcher consent)
We follow Coordinated Vulnerability Disclosure. Please give us 90 days from triage before public disclosure unless the vulnerability is being actively exploited in the wild.