ECDSA Quirks

A simple command line tool to generate the same ECDSA signature for two different messages.

Install

npm install -g ecdsa-quirks

To generate the signatures, run:

ecdsa-quirks --m1 "<some message>" --m2 "<some other message>" [--eip191]

The tool will log the private key and generated signatures via that private key that are the same for the specified messages.

Caution

If both messages (or their hashes) with the signature are disclosed, anyone can reconstruct the private key. Be extremely cautious.

The implementation is based on this research paper. Please check it out to understand the math behind.

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src		src
tests		tests
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.prettierignore		.prettierignore
LICENSE		LICENSE
README.md		README.md
eslint.config.ts		eslint.config.ts
package-lock.json		package-lock.json
package.json		package.json
prettier.config.cjs		prettier.config.cjs
tsconfig.json		tsconfig.json