Seal Once. Verify Forever.
Tamper-evident sealing that runs anywhere — online, offline, or air-gapped. 46,291 seals per second. Zero trust required.
Core Guarantees
01 Deterministic Hashing
Canonical JSON normalization ensures byte-for-byte reproducibility across any platform, any time.
02 Collision Resistant Binding
Proprietary field binding construction prevents extension attacks and ensures unique cryptographic commitment.
03 Offline Verification
Pure function verification flow requires zero network access. Verify on an air-gapped laptop.
04 Client-Owned Keys
You generate and custody the signing keys. Full data sovereignty. No key escrow.
How It Works
Four steps from event to courtroom-grade evidence.
Capture
Your application emits an event — API call, transaction, file change, or sensor reading.
Canonicalize
RFC 8785 deterministic JSON serialization eliminates ambiguity. Same input always produces same output.
Seal
SHA-256 content hash bound to Ed25519 digital signature. Cryptographically tamper-evident in 0.022ms.
Deliver
Evidence Packet with standalone verification proof. Verifiable offline, forever, by anyone.
The Evidence Packet
The Evidence Packet is the product. Everything else is the factory that produces it.
Contents
core/ canonicalized payload
core/ cryptographic manifest
proof/ standalone verification tooling
proof/ pre-computed verification proof
docs/ technical specification
If an auditor cannot verify it on a laptop with no internet, it is not evidence.
Integration Surfaces
Kafka
Ingest events from existing streams and seal them as they flow. Zero-copy integration with your message bus.
HTTP API
POST payloads directly for sealing with deterministic hashing and binding. Simple REST interface.