Wealth Security Protocol
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Overview
💜Casa vs. Alternatives
Introduction
Option #1: Do-it-yourself
Option #2: Custodial Storage
Option #3: Commercial Systems
🔑System Design Principles
Introduction
Minimal Knowledge
High Security
Usability is Security
Expert Support
Redundancy
Sovereignty
Incentive Alignment
Bitcoin First
🚨Threat Overview
Introduction
Data and Credential Loss
Phishing
SIM Hijacking
Network Attacks
Malware
Supply Chain Attack
Physical Coercion
Child/Pet Attack
Internal Service Provider Attack
Platform / Hosting Provider Attack
Code Dependency Attack
Official Seizure
Inheritance Failure
🔐Chosen Features
Introduction
Hardware Wallet Signing
Multi-signature
Multi-location
Heterogeneous Hardware and Software
Seedless Hardware Wallets
Emergency Recovery Key
PIN or Biometrics for Mobile Key only
PIN for every device
Sovereign Recovery Instructions
Emergency Lockdown Button
Health Check
Identity Verification for Account Recovery
✅Chosen Key Schemes
3-of-5 Key Shield
2-of-3 Basic Multisig
Single-Key Wallet
❌Rejected Key Schemes
Key Sharding (Shamir’s Secret Sharing)
2-of-2
1-of-2
❌Rejected Features
Biometrics General Usage
Seed Phrase Backups
Financial Products and Services Integration
Brain Wallet -- Memory Based Solutions
Web-Based Key Management
Hardened Addresses
🔧Remaining Attack Vectors
Address Spoofing
Malicious Insider Key Theft
Extreme disaster scenarios
Extortion
👨‍🚀Future Improvements
Taproot/MAST
Schnorr Signatures
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Brain Wallet -- Memory Based Solutions
A “brain wallet” is the practice of memorizing a seed phrase that is converted into a bitcoin private key. They present a major risk of theft and loss.
One major problem with brain wallets is a lack of true randomness. Attackers can guess and check many brain wallet seeds quickly in parallel. As of 2016 researchers reported an active community of thieves checking brain wallets for balances and draining them within minutes of creation.
Brain wallets also present a significant risk of loss. Injuries or just forgetfulness can cause a seed to be lost forever. To be of comparable security as a normal bitcoin key, a brain wallet seed phrase has to contain a large number of words, such as memorizing a 12-word BIP39 seed phrase. If any of the words are missing or remembered out of order, it may be hard or impossible to recover.
❌Rejected Features - Previous
Financial Products and Services Integration
Next - ❌Rejected Features
Web-Based Key Management
Last modified 1yr ago
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