p521

Releases

1. ▸▾0.14.08 Jul 2026

   p521 v0.14.0

   p521 v0.14.0 (#1902)

   Open source →

   Additional notes2 sources agree

   Added

   • Implement EcdsaCurve (#1019)
   • Implement ReduceNonZero for Scalar (#1148)
   • Implement From<NonZeroScalar> for Scalar (#1188)
   • Implement De/Serialize for ProjectivePoint (#1214)
   • hash2curve crate support (#1286, #1853)
   • Implement CofactorGroup for ProjectivePoint (#1394)
   • 32-bit base field implementation; Uint type as conditional alias for U544/U576 (#1467)
   • getrandom feature (#1521)
   • Implement crypto_common::Generate trait (#1586)
   • precomputed-tables feature (#1738, #1792)
   • Implement FieldArithmetic trait (#1833)

   Changed

   • ECDSA implementation now uses RFC6979 by way of the ecdsa/rfc6979 crates (#1016)
   • Edition changed to 2024 and MSRV bumped to 1.85 (#1125)
   • Relax MSRV policy and allow MSRV bumps in patch releases
   • Base field implementation regenerated using fiat-crypto v0.1.5 (#1413)
   • NistP521::Uint is now the Uint type alias instead of unconditionally U576 (#1467)
   • Use primefield::MontyFieldElement for Scalar field arithmetic (#1565)
   • Use crypto-bigint to implement field inversions (#1574)
   • Bump sha2 dependency to v0.11 (#1712)
   • Bump elliptic-curve to v0.14 (#1849)
   • Use wnaf for vartime (multi)scalar multiplication (#1870)
   • Bump ecdsa to v0.17 (#1883)
   • Bump primeorder to v0.14 (#1887)

   Removed

   • bits feature (#1766)
   • expose-field feature: use FieldArithmetic trait instead (#1834)

   Fixed

   • Size of CompressedPoint (#1652)

• p256crates.ioPure Rust implementation of the NIST P-256 (a.k.a. secp256r1, prime256v1) elliptic curve as defined in SP 800-186, with support for ECDH, ECDSA signing/verification, and general purpose curve arithmetic
• primeordercrates.ioPure Rust implementation of complete addition formulas for prime order elliptic curves (Renes-Costello-Batina 2015). Generic over field elements and curve equation coefficients
• p384crates.ioPure Rust implementation of the NIST P-384 (a.k.a. secp384r1) elliptic curve as defined in SP 800-186 with support for ECDH, ECDSA signing/verification, and general purpose curve arithmetic support.
• k256crates.iosecp256k1 elliptic curve library written in pure Rust with support for ECDSA signing/verification/public-key recovery, Taproot Schnorr signatures (BIP340), Elliptic Curve Diffie-Hellman (ECDH), and general-purpose secp256k1 elliptic curve group operations which can be used to implement arbitrary protocols