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The tribe of the protected.
The False Choice
Self-custody today forces you into a dangerous choice:
The Exchange
"Not your keys, not your coins."
Counterparty Risk
The Hardware Wallet
"Your keys, you targeted."
Physical Risk
"If they can hurt you, they can take your crypto. A hardware wallet protects your keys from hackers, but it doesn't protect you from violence."
The Reality
The Coercion Problem Is Real
Crypto's greatest vulnerability is not hacking—it's violence. Recent, documented cases show that wealth visibility creates immediate physical danger.
Ledger Co-Founder Abduction (2025)
David Balland kidnapped, tortured for cryptocurrency ransom. Perpetrators demanded crypto and mutilated his finger.
Read full report →
Swedish Bitcoin Targeting Campaign
Organized criminals systematically targeting high-net-worth crypto holders in Sweden for abduction and forced wallet access.
Read full report →
Binance Executive Extortion Case
High-level executives targeted through abduction and coercion, resulting in $12.5M in cryptocurrency losses and physical harm.
Read full report →
Why Traditional Security Fails
Hardware Wallets Create Targets
A visible device makes the holder a known target. "Where's your hardware wallet?" becomes the first question under duress.
Seed Phrases Are Extractable
A 12-24 word seed phrase is finite, memorizable, and can be beaten out of you. No technology prevents extraction under torture.
Exchanges = Counterparty Risk
Keeping funds on exchanges for safety trades away control. Not your keys, not your coins—and exchanges can be shut down, hacked, or seized.
Obscurity Is Not a Defense
Hiding your wealth "in the shadows" is fragile. Opsec fails. Social engineering works. One mistake and you're exposed.
The Shift: From hiding in darkness to standing protected by mathematics.
Great Wall uses time-lock mathematics that cannot be bypassed by force, coercion, or any attacker.
The Solution
The Vault of Time
Tacit Knowledge-Based Authentication — TKBA
Deviceless
No Ledger to seize. No paper to find. Your authentication lives in your mind alone. Because it is tacit, it is impossible to be communicated or extracted.
Individual Custody
Upholds the core crypto promise: 'Not your keys, not your coins.' You remain your own bank.
Anti-Obscurity
Obscurity is fragile. TKBA is anti-fragile. Security increases as attackers learn more.
Coercion Resistance
Mathematics cannot be coerced. Even if you want to give up your funds, the protocol says 'Wait'.
How TKBA Compares
A comprehensive comparison of security methods
| Security Method | Deviceless | Ind. Custody | Anti-Obscure | Coercion Res. | Existing Implementations | Primary Downside |
|---|---|---|---|---|---|---|
| TKBA | ✓ | ✓ | ✓ | ✓ | Great Wall | Relies on user not forgetting their tacit knowledge (which we solve via an integrated memory coach) |
| Physical / Sharding | ✗ | ✓ | ✓ | ✓ | Bank vaults, Shamir's Secret Sharing (SSS) | Astronomically high cost and operational complexity. "Glorified gold?" |
| Shared / Delegated | ✓ | ✗ | ✓ | ✓ | Centralized exchanges (Coinbase, Binance) | Violates the core premise of self-custody. "Not your keys, not your coins." |
| Obscurity-Based | ✓ | ✓ | ✗ | ✓* | Decoy wallets, plausible deniability mechanisms | *Backfires dangerously; invites more violence (torture/assassination) from an educated attacker. |
| Vanilla Self-Custody | ✓ | ✓ | ✓ | ✗ | Hardware/paper wallets (Ledger, Trezor, BIP39) | Completely vulnerable to a $5 wrench attack. |
"When the attacker knows they cannot force the unlock, they do not attack. You become a mathematical dead end."
The Philosophy
Anti-Obscurity, Anti-Fragile
Hiding is not protecting. Security by obscurity is a fragile strategy that fails the moment you are discovered.
The Yard Sign Concept
A security yard sign doesn't hide your home. It explicitly announces that you are protected. It correlates visibility with safety.
Great Wall is your digital yard sign.
Deterrence through undeniable strength.
The Architect
Built by T3 Information Security
Great Wall is architected by Yuri S. Villas Boas, a cryptography researcher who redefined bitcoin wallet security standards.
Rooted in deep information security research spanning statistics, physics, and mathematics, we build protocols that assume the attacker knows everything—and still loses.
Formosa Protocol
Creator of Formosa, a BIP39 improvement adopted across crypto wallets for memorable, secure recovery phrases.
SRVB Cryptosystem
Designer of an asymmetric cryptosystem featured in IEEE publications and academic research.
Coercion Resistance
First protocol to combine Deviceless Custody with proven resistance to physical coercion.
Recognized Expertise
Greatwall in the Media
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Live Stream - Greatwall Discussion
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Deep dive into market dynamics
Sovereignty in Action
Understanding the Greatwall philosophy
Ecosystem Overview
Building the foundation of trust
Protection & Security
How Greatwall secures your assets
Future of Greatwall
Vision and roadmap ahead
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A T3 Information Security Protocol