Decision Workspace
opaque vs srp vs spake2
Side-by-side comparison of Rust crates
38
opaque
growingv0.0.0
OPAQUE Password-Authenticated Key Exchange protocol
63
srp
growingv0.6.0
Pure Rust implementation of the Secure Remote Password (SRP) password-authenticated key exchange (PAKE) algorithm as described in RFC5054. Built on `crypto-bigint`, a mathematical library designed with constant-time algorithms.
62
spake2
growingv0.4.0
The SPAKE2 password-authenticated key-exchange algorithm.
Core Metrics
| opaque | srp | spake2 | |
|---|---|---|---|
| Health Score | 38 | 63 | 62 |
| Total Downloads | 2.0K | 64.2K | 879.0K |
| 30d Downloads | 0 | 3.5K | 61.5K |
| Dependents | 0 | 63 | 113 |
| Releases | 1 | 22 | 16 |
| Last Updated | 2774d ago | 52d ago | 121d ago |
| Age | 7y 7m | 8y 9m | 8y 10m |
Health Breakdown
opaque
Maintenance
1
Quality
16
Community
6
Popularity
4
Documentation
11
srp
Maintenance
13
Quality
13
Community
16
Popularity
6
Documentation
15
spake2
Maintenance
10
Quality
13
Community
17
Popularity
7
Documentation
15
Technical Details
| opaque | srp | spake2 | |
|---|---|---|---|
| Version | 0.0.0 | 0.6.0 | 0.4.0 |
| Stable (≥1.0) | ✗ No | ✗ No | ✗ No |
| License | MIT OR Apache-2.0 | MIT OR Apache-2.0 | MIT OR Apache-2.0 |
| Dependencies | 0 | 10 | 7 |
| Crate Size | 765B | 17KB | 19KB |
| Features | 0 | 0 | 3 |
| Yanked % | 0.0% | 0.0% | 6.3% |
| Edition | — | 2021 | 2021 |
| MSRV | — | 1.56 | 1.60 |
| Owners | 1 | 2 (team) | 2 (team) |
Links
Quick Verdict
- •srp leads with a health score of 63/100, but none of the options score above 80.
- •spake2 has the most downloads (879.0K), suggesting wider adoption.
- •spake2 is depended on by 113 crates — strongest ecosystem trust.
- •⚠ opaque has not been updated in over a year.