GitHub - balgar271/Shamir-Secret-Sharing-Seed-Phrase-Encoding-Tool

Contribute to balgar271/Shamir-Secret-Sharing-Seed-Phrase-Encoding-Tool development by creating an account on GitHub.

https://github.com

It consists of:

1. A general-purpose encoding/decoding tool for any text secret:

• Split any text into n shares with a configurable threshold k

• Combine k or more shares to reconstruct the original

• Supports up to 255 shares (GF(256) field limit)

• Hex-encoded shares with one-click copy

1. The SSS BIP-39 Seed Phrase Encoding Tool

• a purpose-built tool for protecting BIP-39 cryptocurrency wallet seed phrases.

• BIP-39 validation: checks word count (12/15/18/21/24) and format

• offline: live network status banner warns if you’re online

• masked input: seed phrase hidden by default with show/hide toggle

• a step-by-step flow: enter → configure → generate

• Download shares: export all shares as a .txt file

• Viewport toggle: switch between mobile and desktop layouts to preview responsiveness -> Uses crypto.getRandomValues() for cryptographically secure randomness

How it works:

Shamir’s Secret Sharing splits a secret into n pieces such that any k pieces can reconstruct it, but k − 1 or fewer reveal absolutely nothing about the original.

The scheme works by:

1. Treating each byte of the secret as a constant term of a random polynomial of degree k − 1

2. Evaluating that polynomial at n distinct points over the finite field GF(256)

3. Each evaluation point becomes a share

4. Reconstruction uses Lagrange interpolation at x = 0 to recover the constant term All arithmetic is performed in GF(2⁸) using the irreducible polynomial x⁸ + x⁴ + x³ + x + 1 (0x11b), which ensures every non-zero element has a multiplicative inverse.

GitHub - balgar271/Shamir-Secret-Sharing-Seed-Phrase-Encoding-Tool

Contribute to balgar271/Shamir-Secret-Sharing-Seed-Phrase-Encoding-Tool development by creating an account on GitHub.

https://github.com

It consists of:

1. A general-purpose encoding/decoding tool for any text secret:

• Split any text into n shares with a configurable threshold k

• Combine k or more shares to reconstruct the original

• Supports up to 255 shares (GF(256) field limit)

• Hex-encoded shares with one-click copy

1. The SSS BIP-39 Seed Phrase Encoding Tool

• a purpose-built tool for protecting BIP-39 cryptocurrency wallet seed phrases.

• BIP-39 validation: checks word count (12/15/18/21/24) and format

• offline: live network status banner warns if you’re online

• masked input: seed phrase hidden by default with show/hide toggle

• a step-by-step flow: enter → configure → generate

• Download shares: export all shares as a .txt file

• Viewport toggle: switch between mobile and desktop layouts to preview responsiveness -> Uses crypto.getRandomValues() for cryptographically secure randomness

How it works:

Shamir’s Secret Sharing splits a secret into n pieces such that any k pieces can reconstruct it, but k − 1 or fewer reveal absolutely nothing about the original.

The scheme works by:

1. Treating each byte of the secret as a constant term of a random polynomial of degree k − 1

2. Evaluating that polynomial at n distinct points over the finite field GF(256)

3. Each evaluation point becomes a share

4. Reconstruction uses Lagrange interpolation at x = 0 to recover the constant term All arithmetic is performed in GF(2⁸) using the irreducible polynomial x⁸ + x⁴ + x³ + x + 1 (0x11b), which ensures every non-zero element has a multiplicative inverse.