JWT Is Not Quantum-Safe — So I Built a Library That Is
JWTs using traditional algorithms like RS256 and ES256 are vulnerable to quantum attacks because quantum computers can break their underlying cryptographic assumptions. A new library, @pq-jwt/core, addresses this by implementing NIST-standardized post-quantum digital signature algorithms ML-DSA and SLH-DSA. The library is designed as a drop-in replacement with the same API structure as existing JWT libraries, supporting TypeScript and common web frameworks.
- ▪Traditional JWT signing algorithms like RS256 and ES256 are vulnerable to Shor's algorithm on a quantum computer.
- ▪The @pq-jwt/core library uses NIST-standardized post-quantum algorithms ML-DSA (FIPS 204) and SLH-DSA (FIPS 205) for quantum-resistant digital signatures.
- ▪NIST published post-quantum cryptography standards in 2024, and the NSA mandates their use in national security systems by 2030.
- ▪The library maintains compatibility with existing JWT workflows, including token structure, claims, and API design.
- ▪@pq-jwt/core supports TypeScript natively and integrates with Express.js middleware for authentication.
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| Canonical URL | https://dev.to/sachin_ruhil_4139768c2981/jwt-is-not-quantum-safe-so-i-built-a-library-that-is-19p |
| Publication time | Sat, 16 May 2026 17:17:09 +0000 |
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Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
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try { if(localStorage) { let currentUser = localStorage.getItem('current_user'); if (currentUser) { currentUser = JSON.parse(currentUser); if (currentUser.id === 3935199) { document.getElementById('article-show-container').classList.add('current-user-is-article-author'); } } } } catch (e) { console.error(e); } sachin ruhil Posted on May 16 JWT Is Not Quantum-Safe — So I Built a Library That Is #security #cryptography #javascript #node I built @pq-jwt/core — a post-quantum JWT library using NIST FIPS 204 (ML-DSA) and FIPS 205 (SLH-DSA). Drop-in successor to RS256/ES256. Here's why it matters and how to use it. https://www.npmjs.com/package/@pq-jwt/core Every Node.js app using jsonwebtoken with RS256 or ES256 has the same problem.
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