Layer 1: Perimeter
Digital Asset Security Consultancy
Non-custodial security for serious digital asset holders.
Fortress21 helps individuals, families, high-net-worth holders, and their advisors secure digital assets without handing over keys, credentials, or control.
Non-custodial by design
Hong Kong based
Global client work
Tens of millions secured
Continuity and inheritance focus
What We Do
Technical security guidance for people who cannot afford guesswork.
We don't sell you a product and we don't become your custodian. We sit with you, look at your real exposure, and build a security setup you can understand, maintain, and hand over. Then you keep it. We never have a key, a credential, or a copy.
Start Here
The Security Diagnostic is the low-commitment first step.
For $249, we review your digital footprint, credential hygiene, email and phone recovery paths, and current asset exposure. You receive a written vulnerability report and concrete next actions. It is the assessment step before implementation, not the full Layer 1 hardening day.
$249
- Attacker's-eye risk review
- Password, SIM, and email hygiene audit
- Prioritized vulnerability report
- 100% credit toward a Layer engagement within 30 days
Which Layer Is Right For Me?
Pick the problem you cannot answer confidently.
Entry services help you choose or prepare. The Layers below are the implementation depths.
Layer 2: Sovereign
Would your family know exactly how to recover your digital assets if you were unreachable?
Build sovereign storage and a tested continuity protocol.Layer 3: Citadel
Would one device, one person, or one location still be enough to compromise everything?
Move to distributed authorization, governance, and jurisdictional resilience.Three Layers of Defense
Start where you are. Go as deep as your assets require.
Our services are split into three implementation layers because security is not one-size-fits-all. Pick the layer that meets you where you are today.
Digital Perimeter Hardening
Stop attackers before they reach your vault. Lock down your email, phone, and credentials so you stop being a soft target.
Best for: Anyone whose financial identity still depends on memory and SMS codes.
1-Day Engagement
Explore Layer 1 →Sovereign Infrastructure and Continuity
Move from a "digital promise" to real ownership, with a continuity protocol your heirs can actually follow.
Best for: Individuals moving off third-party platforms with family in the picture.
2-Day Engagement
Explore Layer 2 →Distributed Authorization and Governance
Institutional-grade multisig across jurisdictions, fiduciary coordination, and anti-coercion frameworks.
Best for: High-net-worth holders who need multi-generational, multi-location resilience.
2-Day Engagement
Explore Layer 3 →Why Choose Fortress21
Four commitments we make on every engagement.
Zero-Knowledge and Non-Custodial
We never touch your access credentials, recovery keys, or assets. You stay in control from start to finish.
Focused on the Asset You Hold
No coin-of-the-week distractions. We go deep on the security of the assets you actually plan to keep.
A Methodology That Holds Up
Our frameworks have protected tens of millions in non-custodial holdings. We adapt them to fit individuals, families, and high-net-worth holders.
Threat Modeling Built Around You
Security is not one-size-fits-all. Every engagement starts with an honest look at your assets, your family, and the risks you actually face.
Our Process
Three easy steps.
01
Choose an entry point
Most clients start with the $249, 60-minute Diagnostic. Beginners who already know they need basic self-custody can choose Sovereign Starter.
02
Get the right next step
You leave with either a written vulnerability report, a starter self-custody action plan, or a clear recommendation for a Layer engagement.
03
Upgrade only when needed
If a deeper Layer engagement fits, the entry service fee credits 100% toward it within 30 days.
What to Expect From Your Session
Hands-on, judgement-free, and technical.
- ✓ Cold storage protocol setup
- ✓ UTXO management and on-chain hygiene
- ✓ Continuity and legacy planning your family can actually follow
- ✓ Air-gapped ceremonies, decoy layers, and multisig governance when they fit your threat profile
Start with a clear-eyed diagnostic.
Tell us where your setup stands today. We'll show you where the real risks sit and what to fix first.
Contact Us