Security • Estimated 70m

ECDSA

fundamentals.ecdsa

ECDSA is the legacy Bitcoin signature algorithm used by pre-Taproot outputs and many wallets. Understanding its nonce and inverse terms explains key leak risks and malleability-era constraints.

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Curated resources (3)

• Mastering Bitcoin: Keys and Addresses (article) Walkthrough of ECDSA signing and verification flow.
• Bitcoin Developer Guide: Transactions (article) Transaction-level context where signatures authorize spends.
• Bitcoin Core Academy: Glossary (article) Terminology reference for cryptographic components and node behavior.

Direct prerequisites (3)

• Modular Inverse
• Scalar Multiplication
• secp256k1 Curve Parameters

Direct dependents (1)

• Digital Signatures

Canonical site description: Interactive Bitcoin knowledge graph with prerequisites, curated resources, and structured topic pages.