sr25519
Schnorr signatures over the Ristretto-compressed Curve25519 group, the Substrate default used by Polkadot and chains built on its framework. It has no formal standard. Broken by Shor's algorithm on a cryptographically relevant quantum computer, which recovers the private key from the public key.
- Quantum status
- Broken by Shor's algorithm
- Standard
- No published standard
- Family
- elliptic curve
- Also known as
- Schnorrkel, Ristretto Schnorr
Rated chains using it
- Bittensor Mainnet, default
Account signatures. Coldkeys and hotkeys. Statement or write-up
- Midnight Mainnet, mandatory
Validator consensus. Aura block-authoring keys. MIP-0010, with status Proposed, would move block production to BABE, also on sr25519. Read at the node-1.0.400 release tag, which Midnight's release notes tell every Mainnet node to run; its runtime is spec version 1.0.300. Source code or release
- Polkadot Mainnet, default
Account signatures. Specification or proposal
Sources
- Cryptography on Polkadot , Polkadot Wiki. Accessed 19 October 2026.
Published beside the Hardy Score and not an input to it. How each chain is scored is set out in the methodology.