ECDSA on brainpoolP512t1
The Elliptic Curve Digital Signature Algorithm over brainpoolP512t1, a 512-bit Brainpool curve: a twist of a curve whose parameters were generated verifiably pseudo-randomly. Nexus signature chains use it by default. A larger curve raises the classical cost of attack but not the quantum one: Shor's algorithm on a cryptographically relevant quantum computer recovers the private key from the public key.
- Quantum status
- Broken by Shor's algorithm
- Standard
- RFC 5639, final
- Family
- elliptic curve
- Also known as
- Brainpool, brainpoolP512t1
Rated chains using it
- Nexus Mainnet, default
Account signatures, brainpoolP512t1. The default when no scheme is given, and verified in consensus at transaction.cpp lines 535 to 546. Every sampled transaction carried a 65-byte key. Source code or release
- Nexus Mainnet, default
Validator consensus, brainpoolP512t1. The miner or staker signs each block with its producer key, built with the Brainpool default. Source code or release
Sources
- RFC 5639: Elliptic Curve Cryptography (ECC) Brainpool Standard Curves and Curve Generation , IETF. Accessed 23 October 2026.
Published beside the Hardy Score and not an input to it. How each chain is scored is set out in the methodology.