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SphincsLib
Rambus SphincsLib is a standalone ‘bare metal’ software library, which implements the SLH-DSA FIPS 205 standard.
SphincsLib provides key generation, signature generation and signature verification for SLH-DSA. The library implements the hashing operations in software but can be integrated with a hardware core for acceleration.
SphincsLib is optimized for minimal footprint and stack usage, and it is designed to be hardware and OS agnostic.
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Security CertificationsFeatures
- Fast and minimal SLH-DSA software library
- ‘Bare-metal’, no OS nor HW dependencies
- Single API for both HW and SW
- Support for integrating 3rd party SW or HW SHA-256, SHA-512 and SHAKE256 implementation
- Written in clear, highly-portable C-source code
- Engineer-level support and updates provided under maintenance
Specifications
FIPS 205: Stateless Hash-based Digital Signature Algorithm (SLH-DSA)
Supported Parameter Sets:
| Parameter set | Security category | Public key bytes | Signature bytes |
|---|---|---|---|
| SLH-DSA-SHA2-128s | 1 | 32 | 7856 |
| SLH-DSA-SHAKE-128s | 1 | 32 | 7856 |
| SLH-DSA-SHA2-128f | 1 | 32 | 17088 |
| SLH-DSA-SHA2-128f | 1 | 32 | 17088 |
| SLH-DSA-SHA2-192s | 3 | 48 | 16224 |
| SLH-DSA-SHAKE-192s | 3 | 48 | 16224 |
| SLH-DSA-SHA2-192f | 3 | 48 | 35664 |
| SLH-DSA-SHAKE-192f | 3 | 48 | 35664 |
| SLH-DSA-SHA2-256s | 5 | 64 | 29792 |
| SLH-DSA-SHAKE-256s | 5 | 64 | 29792 |
| SLH-DSA-SHA2-256f | 5 | 64 | 49856 |
| SLH-DSA-SHAKE-256f | 5 | 64 | 49856 |
Use Cases:
- Secure boot
- Firmware update
- No OS, resource constrained environment
- Quantum Safe requirements for above
