Hands-On Practice

Interactive Labs

Browser-native cryptographic tools. No setup, no installs, no account. Everything runs on the WebCrypto API.

Cryptographic Primitives

SHA-256 / PAE Explorer

Hash any text or binary content live in your browser using SubtleCrypto. Visualize the avalanche effect — change one character and watch half the bits flip. Includes PAE (Pre-Authentication Encoding) for DSSE payload construction.

Open Lab →

✓Real-time SHA-256 via WebCrypto API
✓Avalanche effect visualization (bit diff count)
✓PAE encoding alongside raw hash
✓Binary file drag-and-drop support

Attestation Verification

DSSE 7-Stage Canon Verifier

Paste a Canon Attestation JSON and walk it through all 7 verification stages. See exactly where trust is established — from witness hash to Ed25519 signature to custody chain. Runs entirely in your browser.

Open Lab →

✓Full 7-stage verification lifecycle
✓Per-stage pass / fail / warning output
✓Chain hash linking validation
✓Ed25519 signature verification (WebCrypto)