---
title: "WOTS+: which blockchains use it"
url: "https://hardyindex.com/algorithms/wots-plus"
---

# WOTS+

The Winternitz one-time signature construction specified as a component of XMSS in RFC 8391. NIST SP 800-208 approves XMSS and LMS, not WOTS+ used on its own. Each key signs once.

- **Quantum status:** Believed quantum-resistant. No post-quantum scheme carries a proof of resistance.
- **Standard:** RFC 8391 (IETF, final).
- **Family:** hash based one time.
- **Also known as:** Winternitz one-time signature plus.

## Rated chains using it

- [Mochimo](https://hardyindex.com/chains/mochimo.md): account signatures, mainnet, mandatory, PARAMSN 32, WOTSW 16. Source (source code or release): https://github.com/mochimodev/mochimo/blob/master/src/wots.h

## Sources

- [RFC 8391: XMSS: eXtended Merkle Signature Scheme](https://datatracker.ietf.org/doc/html/rfc8391), IETF. Accessed 19 October 2026.