SasaSavic.ca recently launched a public cryptographic timestamping service designed to remain verifiable even in a post-quantum world.
The platform uses SasaSavic Quantum Shield™, a dual-signature protocol combining classical and post-quantum security.
Each submitted SHA-256 hash is:
• Dual-signed with ECDSA P-256 and ML-DSA-65 (per NIST FIPS 204)
• Anchored to the Bitcoin blockchain via OpenTimestamps
• Recorded in a public, verifiable daily ledger
API (beta, no auth required):
https://sasasavic.ca/beta-api/
Example curl request:
curl -X POST https://sasasavic.ca/api/v1/beta/timestamp
-H “Content-Type: application/json” -d ‘{“hash”:”e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855″}’
Verification and ledgers:
https://sasasavic.ca/verify
The goal is to make cryptographic proofs quantum-resistant and accessible, while preserving user privacy — only the hash ever leaves the client side.
Feedback from developers, auditors, and researchers on PQC integration and verification speed is welcome.
More details and documentation:
https://sasasavic.ca/quantum-shield/
– The SasaSavic.ca Team
Comments URL: https://news.ycombinator.com/item?id=45819273
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Source: news.ycombinator.com
