Protocol & Consensus • Estimated 35m

Quadratic SIGHASH Hashing Cost

protocol.sighash-quadratic-hashing

Legacy signature hashing repeated transaction-wide work for each input, creating quadratic validation cost as transactions grew. Cached digest designs such as BIP 143 address this performance failure while preserving signature-commitment semantics.

Open visual node page • Browse the concept library

Curated resources (3)

• Bitcoin Dev Project: Quadratic Sighash problem explained (article) Learner-facing explanation of the historical O(n^2) hashing problem.
• BIP 143: Transaction Signature Verification (article) Defines the digest structure and cached components that avoid repeated hashing work.
• Programming Bitcoin (book) Background on transaction digests and signature verification.

Direct prerequisites (1)

• SIGHASH Flags

Direct dependents (0)

• None

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