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Bitcoin Recover Privkey

Bitcoin Recover Privkey is a Python proof of concept that demonstrates recovering a Bitcoin private key from weak ECDSA signatures sharing the same r value. Its README summarizes the recovery mathematics, describes obtaining transaction parameters, and gives a command to run the script.

Explore the practical guide ↓

Independent OpenViST project profile, based on linked sources.

Bitcoin Recover Privkey — OpenViST project profile in Security & Custody.
OpenViST project illustration. See the linked sources for product details.
Understand the project

Practical overview

When it fits

Use it for a focused study or demonstration of Bitcoin ECDSA key recovery under the specific weak-signature condition of repeated r values.

Who it is for

  • Developers and learners studying ECDSA nonce reuse and private-key exposure.
  • Readers who want to examine a small Python cryptography proof of concept using Bitcoin transaction signature data.

Documented uses

  • Explore the mathematics of private-key recovery when ECDSA signatures reuse r.
  • Run the documented Python proof-of-concept script with relevant signature values.
  • Understand which transaction values the README says are needed for the calculation.
Before you choose

Requirements & limits

  • The documented recovery case depends on weak signatures with the same r value.
  • The README requires obtaining z1 and z2 through examination of OP_CHECKSIG processing; it does not provide an automated extraction workflow.
  • The documented execution step is python ProofOfConcept.py.
  • The repository identifies Python as its language and describes itself as a proof of concept.

Check current requirements in the official documentation. Source-based guidance does not mean OpenViST has run or independently tested this project.

Source-based practical guide

Run the Python proof of concept

Run the repository’s documented recovery script after identifying the signature values needed for its calculation.

Before you start

  • Python
  • Bitcoin transaction signature data, including z1 and z2 obtained by examining OP_CHECKSIG processing

Steps

  1. Inspect the relevant Bitcoin transaction and obtain z1 and z2 from its OP_CHECKSIG processing.

  2. Obtain the other parameters from the transaction, as described in the README.

  3. Run the command below.

    Documented command
    python ProofOfConcept.py

Expected outcome

Runs the project’s documented proof-of-concept script for the key-recovery calculation.

Guide limitations

  • This is a proof of concept for weak signatures with a reused r value, not a general-purpose recovery tool.
Documentation 1 ↗
Evidence and transparency

Sources & review

Official repository ↗
Source record details
Source availability
Active
Sources checked
18 October 2026
Original website title
daedalus/bitcoin-recover-privkey · Official homepage title · retained in its source language
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