Decision Workspace
concat-kdf vs one-step-kdf vs p256
Side-by-side comparison of Rust crates
46
concat-kdf
growingv0.1.0
Concatenation Key Derivation Function (Concat KDF)
58
one-step-kdf
experimentalv0.1.0-rc.1
One-Step Key Derivation Function as defined in NIST SP 800-56C R2
77
p256
growingv0.13.2
Pure 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
Core Metrics
| concat-kdf | one-step-kdf | p256 | |
|---|---|---|---|
| Health Score | 46 | 58 | 77 |
| Total Downloads | 1.9M | 1.8K | 98.9M |
| 30d Downloads | 224.2K | 17 | 9.9M |
| Dependents | 6 | 0 | 5.6K |
| Releases | 1 | 2 | 53 |
| Last Updated | 1461d ago | 53d ago | 17d ago |
| Age | 4y | 4m | 7y 5m |
Health Breakdown
concat-kdf
Maintenance
1
Quality
15
Community
13
Popularity
8
Documentation
9
one-step-kdf
Maintenance
14
Quality
14
Community
11
Popularity
4
Documentation
15
p256
Maintenance
18
Quality
16
Community
20
Popularity
8
Documentation
15
Technical Details
| concat-kdf | one-step-kdf | p256 | |
|---|---|---|---|
| Version | 0.1.0 | 0.1.0-rc.1 | 0.13.2 |
| Stable (≥1.0) | ✗ No | ✗ No | ✗ No |
| License | MIT OR Apache-2.0 | MIT OR Apache-2.0 | Apache-2.0 OR MIT |
| Dependencies | 4 | 3 | 13 |
| Crate Size | 7KB | 12KB | 63KB |
| Features | 1 | 0 | 17 |
| Yanked % | 0.0% | 0.0% | 3.8% |
| Edition | 2018 | 2024 | 2021 |
| MSRV | — | 1.85 | 1.65 |
| Owners | 2 (team) | 2 (team) | 2 (team) |
Links
Quick Verdict
- •p256 leads with a health score of 77/100, but none of the options score above 80.
- •p256 is depended on by 5.6K crates — strongest ecosystem trust.
- •⚠ concat-kdf has not been updated in over a year.