Diagramme Venn

SECURE · SIMPLE · SOVEREIGN

Stop picking sides - Demand everything

How We Disrupt the Game

Three trustless steps from seed phrase fragility to mathematically guaranteed recovery

1
Fragment

Split Your Seed

CyberShard's Shamir algorithm fragments your Seed Phrase into N cryptographic shards using polynomial interpolation over a finite field. Your original Seed is never stored anywhere, it is processed purely in-memory and is instantly flushed once the shards are generated.

2
Distribute

Place Shards Everywhere

Assign each encrypted shard to a different location of your choice: a secure digital vault, a hardware device, a trusted family member, a notary, or a physical safe. No location alone holds any recoverable information.

3
Recover

Reconstruct on Demand

Collect any T shards out of your N (e.g., any 3 of 5). CyberShard reconstructs your Seed with mathematical precision via Lagrange interpolation. Premium plans verify each shard's integrity cryptographically before reconstruction begins.

Why CyberShard?

CyberShard revolutionises digital asset protection by replacing vulnerable, single-point backups with a resilient, multi-part architecture. By fragmenting your Seed Phrase into distinct, manageable "shards", we eliminate the catastrophic risk associated with a scrap of paper. Our Shamir-based protocol ensures that no individual stolen or damaged share grants access to your funds. Security is only restored when your specific recovery threshold is met. Whether you distribute your shards across secure physical locations or trusted custodians, CyberShard empowers you with true decentralised custody and total sovereignty over your digital wealth.

Break Free from Single Points of Failure

Discover the ultimate Seed Phrase resilience. By fragmenting your Seed Phrase into cryptographic shards distributed across both online vaults and offline physical mediums, you guarantee absolute fund recovery, no matter what happens.

Fragment your Seed Discover the tech →
Infinite Resilience
Hybrid Online / Offline
Zero Compromised Funds
Shamir Secret Sharing Architecture

🌐 Hybrid Distribution

Scatter your shards across digital secure enclaves and physical offline mediums (SSD disks, USB keys, Dropbox, vaults). Maximize security by bridging the physical and digital worlds.

🛡️ Fault Tolerance (3-of-5)

A flood destroys your paper backup? A hacker targets your cloud? With a 3-of-5 threshold, your remaining 3 shards still perfectly reconstruct your Seed. Your funds never freeze.

⚡ Absolute Sovereignty

Eliminate third-party risk. No central authority holds your complete Seed. You retain full ownership, utterly immune to exchange bankruptcies or hardware wallet exploits.

Design Your Own Security

CyberShard lets you configure different T-of-N thresholds.
Move the sliders — discover the configuration that fits your life.

Total Shards (N) 5
Required to Recover (T) 3

Our Plans

Premium Plan: Advanced family estate and multi-device protection. Distribute across trusted relatives, physical vaults, and digital enclaves.

3-of-5
Shards needed to reconstruct

● Required    ● Optional (fault tolerance)

Configure Your Vault

⚠

The Risk No One Talks About

What happens to your crypto when you die?

The greatest risk for long-term holders is not a hack. It is an inaccessible estate. An estimated $140 trillion in wealth will transfer between generations by 2040, with a significant share in digital assets. Without a structured recovery plan, heirs inherit nothing but an encrypted dead end.

4M+
Bitcoin are estimated permanently lost — many due to the death of their owners with no recovery mechanism in place. Source: Chainalysis.

With a CyberShard 3-of-5 estate plan, you distribute shards to your chosen heirs, a notary, and a family lawyer. No single person — not even your notary — can access your assets unilaterally. Recovery is only possible when your threshold of trusted parties cooperates, exactly as you intended.

Plan Your Legacy
Your
Seed Phrase
👤
Heir 1
👤
Heir 2
⚖️
Notary
📋
Lawyer
🔐
Cold Vault
✓ Any 3 of 5 reconstruct the estate

No single holder can act alone — by design.

Why Not the Alternatives?

"Current key management options are built on compromises. As a holder, I designed CyberShard to eliminate the trade-offs I feared most. It is the only architecture engineered to guarantee all three simultaneously: absolute resilience, cryptographic verification, and true sovereignty." — Jean-Luc C., CEO

🏠 Casa
Multi-key · Hardware · Retail
  • Rigid Multi-sig Framework — protects transactions, not the underlying seed
  • Exposed Execution — requires active internet connection and app-sync to coordinate
  • No Client-Side Offline Cryptography — key coordination relies on their network
  • No cryptographic shard integrity verification (PVSS)
  • Physical Media Blindspot — cannot back up shards onto offline physical vaults
🔐 Ledger Recover
Centralised Custody · Hardware OEM
  • Corporate Custody Triad — your seed reconstruction capability is split between Ledger, Coincover, and EscrowTech
  • Cloud-Exposed Fragmentation — shards are processed through third-party servers
  • Mandatory Identity Link — ties your private cryptographic keys to a government ID (KYC)
  • No user-configurable threshold or custom governance options
🏦 Fireblocks
MPC · Enterprise · Institutional
  • Strictly Online MPC — mathematically impossible to distribute shards onto offline physical media
  • Enterprise Lock-in — pricing and deep API infrastructure are inaccessible to individuals and SMEs
  • Complex Self-Hosted Demands — not a plug-and-play or self-service architecture
  • No native estate planning or multi-generational succession workflow
⛓ Unchained Capital
Multi-sig · Bitcoin-only · Co-custody
  • Bitcoin-Only Isolation — zero support for multi-chain assets or EVM/Solana seed phrases
  • Mandatory Co-Signer — Unchained holds a key, creating a centralized dependency and KYC tracking
  • No local client-side cryptographic isolation during setup
  • No verifiable shard integrity layer to prevent malicious piece corruption
✓ Only CyberShard Pure Client-Side Isolation 100% offline cryptographic execution in your browser environment. Your seed never touches a server.
✓ Only CyberShard Configurable Threshold Any T-of-N governance structure. Match your exact security blueprint from 2-of-3 up to 7-of-10.
✓ Only CyberShard PVSS Integrity Proof Pedersen commitments mathematically verify each shard before reconstruction. Eliminate blind trust.
✓ Only CyberShard True Hybrid Distribution Print physical armor shards or save to digital enclaves. Hardware and cloud agnostic.

Think our security is breakable?

Take the Crypto Challenge

Unlock the Full Spectrum of Shamir Secret Sharing

SECRET

Shamir's Secret Sharing

Securing digital sovereignty by deconstructing your Seed into cryptographic shards via Shamir’s Secret Sharing to eliminate single points of failure.

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INFO

Shamir advanced info

Eliminate single points of failure by fragmenting your Seed into cryptographic shards, leveraging a (2,3) threshold protocol to ensure asset recovery even if a shard is compromised or lost.

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MATHS

Cryptographic Foundations

Explore the mathematical framework of Shamir’s Secret Sharing to understand how Lagrange interpolation and finite fields secure your Seed against modern adversarial threats.

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Why CyberShard

Why CyberShard?

See how our SSS + PVSS architecture outperforms every alternative — Casa, Ledger Recover, Fireblocks, Unchained — on resilience, verifiability, and true sovereignty.

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Read more
X402

Evidence

Verify your security through mathematical certainty: Shamir’s Secret Sharing replaces blind trust with decentralized evidence, by eliminating single points of failure and ensuring resilient, verifiable recovery.

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FAQ

FAQ

Stop relying on marketing promises and start verifying the math. This FAQ provides the technical clarity and cryptographic evidence you need to understand why distributed sharding is the only resilient path for digital asset recovery.

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Read more

Built for Every Investor

Crypto Enthusiasts

Eliminate single points of failure with sharded Seed security.

Funds & Institutions

Deploy institutional capital via secure, multi-party threshold authorisation.

Communities & DAOs

Distribute treasury governance through mathematically-enforced trust.

Our Philosophy

We believe the future of digital sovereignty is distributed, trustless, and mathematically secure. CyberShard exists to replace central points of failure with sharded cryptographic resilience, empowering a new era of finance where autonomy is guaranteed by code, not by intermediaries.

About Us


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Meet the Quantitative Minds Behind Our SSS Engine

Eliminate Single Points of Failure

Single backups are single points of failure. Fragment your access, distribute your security, and recover your wealth even if your physical world is compromised.

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