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Certicom

The company whose SEC 2 standard defines secp256k1

Certicom Research wrote SEC 2, the Standards for Efficient Cryptography document that defines the recommended elliptic curve domain parameters, including secp256k1, the Koblitz curve Bitcoin uses. SEC 2 says a Koblitz curve's parameters were chosen by repeatedly selecting parameters admitting an efficiently computable endomorphism until a prime order curve was found.

Description sourced from

  • Standards for Efficient Cryptography GroupOct 19, 2026

    “The recommended parameters associated with a Koblitz curve were chosen by repeatedly selecting parameters admitting an efficiently computable endomorphism until a prime order curve was found.”

Named in 1 piece

  1. Protocol Research

    Bitcoin Skipped the NIST Curve a 1997 Clock Just Explained

    Claude traced NIST's curve seeds to a Unix clock in 1997, and Bitcoin has run all along on secp256k1, a curve built a different way.

    Oct 16, 2026

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