libsecp256k1 replaces OpenSSL for consensus in Bitcoin Core v0.12
On January 15, 2016, Bitcoin Core v0.12 replaced OpenSSL with libsecp256k1 — Wuille and Maxwell's custom elliptic-curve library — for consensus-critical ECDSA verification.
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On January 15, 2016, Bitcoin Core v0.12 replaced OpenSSL with libsecp256k1 — Wuille and Maxwell's custom elliptic-curve library — for consensus-critical ECDSA verification.
On November 20, 2011, Bitcoin v0.5 shipped with the Crypto++ SHA-256 subset removed and replaced by OpenSSL. Wei Dai's library, a direct codebase dependency since v0.1, was gone.
Editorial reading of unusual distribution and tooling in Bitcoin v0.1: .rar packaging, no version control, no test suite, Hungarian notation. Compares Warez-scene conventions, Kaminsky 2011.