// PROTOCOL
Paste your 12 or 24-word seed phrase. It never leaves your device.
Pick 2–10 shards and set your recovery threshold (e.g. 3-of-5).
Download encrypted shard files. Give them to trusted people or hide them in separate locations.
// CAPABILITIES
Distribute across 10 independent locations, devices, or trusted contacts. Require any custom threshold to reconstruct.
Military-grade AES-256 encryption combined with Shamir's Secret Sharing — the gold standard for threshold cryptography.
Your seed phrase never touches our servers. Everything runs locally in your browser. We see nothing.
Set a minimum k-of-n threshold. Need 3 of 5 shards? 7 of 10? You decide the recovery policy.
Download shards as encrypted QR codes, text files, or printable paper wallets. Store them how you want.
Every line of cryptographic code is auditable on GitHub. Trust math, not promises.
One house fire, one forgotten password, one compromised device — and it's gone forever. CyberShard eliminates every single point of failure.
RUNS 100% IN YOUR BROWSER · NO ACCOUNT REQUIRED · OPEN SOURCE