Cryptographic proof that your files haven't been altered. Sign builds, documents, and media with military-grade Ed25519 signatures. Detect tampering instantly, prove authenticity legally, secure your supply chain in minutes.
Military-grade Ed25519 signatures make tampering mathematically impossible. Each file gets cryptographically bound proof - try to alter even one bit and verification fails instantly.
Zero infrastructure setup. GitHub Actions, CLI tools, drag-and-drop verification. Your team is signing builds and detecting tampering in under 5 minutes.
Any file type, any workflow. C2PA standard for media, Office document embedding, sidecar files for builds. Integrates with tools you already use.
Install CLI → Generate Keys → Sign Files → Done. Complete walkthrough gets you from zero to tamper-proof builds in under 5 minutes.
GitHub Actions ready-to-go. Copy-paste workflows for Jenkins, GitLab CI. Your builds get signed automatically - no manual steps.
Drag. Drop. Verified. Web viewer works in any browser - no downloads, no accounts, no data leaves your device. Try it with any file right now.
Download; then drop document.txt (and its .passport.json) into the Viewer.
See the complete provenance record with signature and metadata.
Sample document for testing non-media workflows.