What is Shamir's Secret Sharing?

Shamir's Secret Sharing is a cryptographic algorithm invented by Adi Shamir in 1979. It allows you to split a secret into multiple parts (shares), where only a specific number of shares (threshold) are needed to reconstruct the original secret. Individual shares reveal nothing about the secret.

Is this tool safe to use for cryptocurrency seed phrases?

Yes, this tool is safe because it runs 100% in your browser. Your secret never leaves your device - no data is sent to any server. You can verify this by disconnecting from the internet and using the tool offline. The code is open source and can be audited.

What happens if I lose some shares?

With Shamir's Secret Sharing, you can lose shares as long as you still have the threshold number. For example, with a 3-of-5 configuration, you can lose up to 2 shares and still reconstruct your secret with the remaining 3 shares.

Can someone with fewer shares than the threshold learn anything about my secret?

No. Shamir's Secret Sharing has the property of information-theoretic security. Having fewer shares than the threshold reveals absolutely nothing about the original secret - not even a single bit of information.

What should I use this tool for?

Common use cases include: splitting cryptocurrency seed phrases/recovery phrases for secure backup, distributing master passwords among family members, backing up encryption keys, sharing API credentials among team members, and digital inheritance planning.

100% Client-Side - Your Secret Never Leaves Your Browser

Secret Splitter

Name: Secret Splitter - Shamir Secret Sharing Tool
Rating: 5 (1 reviews)
Author: Inheritfy

Split any secret into multiple shares using Shamir's Secret Sharing. Distribute shares to trusted parties - only the required threshold can reconstruct your secret.

Your Secret

0 / 10,000 characters

Threshold (K)Shares needed to reconstruct

Total Shares (N)Shares to generate

3 of 5 shares required to reconstruct

Any 3 shareholders can recover the secret. 3 shares can be lost without losing access.

How Shamir's Secret Sharing Works

A cryptographic technique invented by Adi Shamir in 1979 that allows you to split a secret into multiple parts, where only a threshold number of parts can reconstruct the original.

Split Your Secret

Your secret is mathematically divided into N shares. Each share by itself reveals nothing about the original secret.

Set a Threshold

Choose how many shares (K) are needed to reconstruct. With K-of-N sharing, any K shares can recover the secret.

Distributed Security

No single person or location has enough information to access your secret. It requires collaboration.

Common Use Cases

Cryptocurrency Seed Phrases

Split your 12/24 word recovery phrase among family members

Master Passwords

Distribute your password manager master key

Encryption Keys

Secure backup keys for encrypted files or drives

Business Secrets

Share critical credentials among trusted partners

Estate Planning

Ensure loved ones can access important information

API Keys & Tokens

Protect production credentials from single points of failure

Your Privacy is Protected

100% client-side processing - your secret never leaves your browser
No data is sent to any server - works completely offline
No cookies, no tracking, no analytics on this tool
Open implementation - verify the code yourself

Want Automated Secret Sharing?

Inheritfy uses Shamir's Secret Sharing to automatically protect your digital legacy. Set up trustees, define policies, and ensure your loved ones can access what matters.

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