展示HN：免费量子抗性时间戳API（双重签名和比特币）
SasaSavic.ca 最近推出了一项公共密码学时间戳服务，旨在即使在后量子世界中也能保持可验证性。<p>该平台使用 SasaSavic Quantum Shield™，这是一种结合了经典和后量子安全性的双重签名协议。<p>每个提交的 SHA-256 哈希都经过以下处理：
• 使用 ECDSA P-256 和 ML-DSA-65 进行双重签名（符合 NIST FIPS 204）
• 通过 OpenTimestamps 锚定到比特币区块链
• 记录在一个公开的、可验证的每日账本中<p>API（测试版，无需认证）：
<a href="https://sasasavic.ca/beta-api/" rel="nofollow">https://sasasavic.ca/beta-api/</a><p>示例 curl 请求：
curl -X POST <a href="https://sasasavic.ca/api/v1/beta/timestamp" rel="nofollow">https://sasasavic.ca/api/v1/beta/timestamp</a>
-H "Content-Type: application/json" -d '{"hash":"e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"}'<p>验证和账本：
<a href="https://sasasavic.ca/verify" rel="nofollow">https://sasasavic.ca/verify</a><p><a href="https://sasasavic.ca/ledgers/" rel="nofollow">https://sasasavic.ca/ledgers/</a><p>我们的目标是使密码学证明具备抗量子攻击能力并且易于访问，同时保护用户隐私——只有哈希值会离开客户端。<p>欢迎开发者、审计员和研究人员对后量子密码学的集成和验证速度提供反馈。<p>更多详细信息和文档：
<a href="https://sasasavic.ca/quantum-shield/" rel="nofollow">https://sasasavic.ca/quantum-shield/</a><p>– SasaSavic.ca 团队
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SasaSavic.ca recently launched a public cryptographic timestamping service designed to remain verifiable even in a post-quantum world.<p>The platform uses SasaSavic Quantum Shield™, a dual-signature protocol combining classical and post-quantum security.<p>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<p>API (beta, no auth required):
<a href="https://sasasavic.ca/beta-api/" rel="nofollow">https://sasasavic.ca/beta-api/</a><p>Example curl request:
curl -X POST <a href="https://sasasavic.ca/api/v1/beta/timestamp" rel="nofollow">https://sasasavic.ca/api/v1/beta/timestamp</a>
-H "Content-Type: application/json" -d '{"hash":"e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"}'<p>Verification and ledgers:
<a href="https://sasasavic.ca/verify" rel="nofollow">https://sasasavic.ca/verify</a><p><a href="https://sasasavic.ca/ledgers/" rel="nofollow">https://sasasavic.ca/ledgers/</a><p>The goal is to make cryptographic proofs quantum-resistant and accessible, while preserving user privacy — only the hash ever leaves the client side.<p>Feedback from developers, auditors, and researchers on PQC integration and verification speed is welcome.<p>More details and documentation:
<a href="https://sasasavic.ca/quantum-shield/" rel="nofollow">https://sasasavic.ca/quantum-shield/</a><p>– The SasaSavic.ca Team