p521
v0.14.0 GrowingPure Rust implementation of the NIST P-521 (a.k.a. secp521r1) elliptic curve as defined in SP 800-186, with support for ECDH, ECDSA signing/verification, and general purpose curve arithmetic
Quick Verdict
- ✓Actively maintained (updated 5d ago)
- !Pre-1.0: API may have breaking changes
- ✓Massive adoption (1.2K crates depend on it)
- ✓Team maintained (2 owners)
- ✓Permissive license (Apache-2.0 OR MIT)
Security
Deep Insights
2.2M downloads in the last 30 days (75.0K/day). Volume is roughly flat compared to the previous period.
1.2K crates depend on p521. Strong ecosystem adoption means battle-tested code and long-term stability.
The primary maintainer publishes 216 crates. This suggests deep Rust expertise and long-term commitment to the ecosystem.
Despite being 7+ years old, p521 hasn't reached 1.0 yet. Expect potential API changes between versions.
Notable dependents include c2pa, ssh-key, hpke, pgp, russh. When high-quality crates choose p521, it's a strong quality signal.
Health Breakdown
Recency, release consistency, active ratio
Yanked ratio, deps, size, maturity, features
Reverse deps, ownership, ecosystem
Downloads, momentum, growth trend
Docs, repo, license, metadata
Download Trend
Top Dependents
Most downloaded crates that depend on p521
Version Adoption
Release Timeline
Feature Flags
default =["arithmetic", "ecdsa", "pem", "precomputed-tables", "std"]
