Free Quantum-Resistant Timestamping API (Dual-Signature and Bitcoin)
Details
- External ID
- 45819273
- Source
- HN
- Company
- —
- Product
- —
- Website domain
- —
- Launched
- Nov. 5, 2025
- Cohort
- —
- Upvotes
- 5
- Upvotes percentile
- 0.0982532751091703
- Tags
- —
- Fetched at
- Sept. 7, 2026, 9:25 p.m.
- Updated at
- Sept. 7, 2026, 9:25 p.m.
Description
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 ledgerAPI (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/verifyhttps://sasasavic.ca/ledgers/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
Enrichment
- Theme
- scientific computing and deep tech tools
- Vertical
- Security
- Function
- Data infrastructure
- Audience
- Developer
- AI stance
- Not AI
- Project type
- Commercial product
- Normalized one-liner
- quantum-resistant timestamping api
- Manually corrected
- False
Could you build this?
No Implementing a verifiable quantum-resistant timestamping service involves advanced cryptography (post-quantum signature schemes like Dilithium/Falcon or SPHINCS+) alongside Bitcoin blockchain anchoring protocols.
What it would actually take: The service needs low-level cryptographic libraries supporting NIST post-quantum cryptographic standards (ML-DSA / SLH-DSA), dual-signing mechanics, Merkle tree batching, and an automated Bitcoin transaction committer (OP_RETURN anchoring via Bitcoin node RPC). Building a tamper-proof, legally defensible, and cryptographically sound service requires specialized applied cryptography researchers and blockchain infrastructure engineers.
Discussion
1 comment analyzed.
Competitors mentioned: OpenTimestamps, Traditional timestamping services (ECDSA/RSA-based)
Concerns raised: Whether quantum computing will actually break classical cryptography in relevant timeframes, Long-term viability of Bitcoin anchoring for proofs
Feature requests: SDKs for popular languages/frameworks, Batch timestamping for multiple files, Integration with document workflows
Competitors
Other products that read as similar to this one — 52 launches clear the similarity bar, closest 8 shown.
Attention rank: #51 of 53 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Launched 6 days after the earliest competitor.
- scuttle · github · 2026-09-23 · 55 upvotes · similarity 0.44
- Quantum Blue · ph · 2026-09-09 · 1 upvotes · similarity 0.43
- zubit-protocol · github · 2026-09-28 · 32 upvotes · similarity 0.42
- Secure Core FFI · ph · 2026-09-14 · 1 upvotes · similarity 0.39
- Bitcoin and Quantum Computing · hn · 2026-04-11 · 6 upvotes · similarity 0.39
- skink · ph · 2026-09-30 · 2 upvotes · similarity 0.38
- OraVera — Precious Asset Infrastructure · ph · 2026-09-18 · 1 upvotes · similarity 0.37
- Jev-Quantum · github · 2026-09-21 · 31 upvotes · similarity 0.37
Other launches for this product
- No other launches for this product.
Same idea, different domain
Nobody's really built a data infrastructure tool for Media & entertainment yet.