About ShamirVault

What is ShamirVault?

ShamirVault is a free, open-source web tool that lets you split any secret into multiple parts using Shamir's Secret Sharing (SSS) algorithm. Only a configurable minimum number of parts (the threshold) can reconstruct the original secret. It's ideal for backing up Bitcoin seed phrases, passwords, private keys, and any sensitive data.

Our Philosophy

ShamirVault is built on three core principles:

  • Zero-trust — All processing happens 100% in your browser. No data is ever sent to any server. We can't see your secrets because they never reach us.
  • Open-source — The code is transparent and auditable. Anyone can verify the cryptographic implementation and ensure there are no backdoors.
  • Client-side first — ShamirVault works offline as a Progressive Web App (PWA). Install it on your device and use it in air-gapped environments for maximum security.

Technology

ShamirVault is built with modern, proven technologies:

Shamir's Secret Sharing

Cryptographic algorithm invented by Adi Shamir in 1979. Provides information-theoretic security — fewer shares than the threshold reveal zero information about the secret.

GF(256) Arithmetic

Uses Galois Field arithmetic over GF(2^8) for polynomial evaluation. This is the standard approach used in proven implementations of SSS.

Flutter & WebAssembly

Built with Flutter and compiled to WebAssembly (WASM) for near-native performance in the browser. The app is fast, responsive, and works on any modern device.

Developer

ShamirVault is developed and maintained by mcruza. The project is driven by the belief that everyone should have access to strong, easy-to-use cryptographic tools for protecting their digital assets.

Contact

Have questions, feedback, or want to contribute? Reach out at info@shamirvault.com or visit the contact page.