Protocol & Consensus • Estimated 35m

Strict DER Signature Encoding

protocol.strict-der-signatures

The consensus rule that requires legacy ECDSA signatures in Bitcoin script to use strict Distinguished Encoding Rules (DER), rejecting ambiguous encodings that could otherwise create multiple valid transaction representations.

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Curated resources (4)

• BIP 66: Strict DER Signatures (article) Canonical specification for the deployed strict-DER consensus rule and its validation behavior.
• Bitcoin Core BIP Implementation Index (article) Shows how BIP 66 is implemented and deployed in Bitcoin Core.
• Bitcoin Core Script Interpreter (article) Implementation reference for signature-encoding checks during script evaluation.
• Programming Bitcoin (book) Provides the signature, script, and transaction context needed to understand strict encoding rules.

Direct prerequisites (1)

• Bitcoin Script

Direct dependents (0)

• None

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