Skip to content

SeedSafe Security

Overview

SeedSafe Security represents an impenetrable vault architecture for BIP-39 mnemonic seed phrase protection, implementing military-grade split-storage cryptography and zero-knowledge protocols to safeguard existing wallet recovery keys. Through independent encryption of mnemonic halves, distributed trust models, and authenticated split-retrieval mechanisms, SeedSafe ensures that seed phrases remain cryptographically inaccessible to all parties—including UnoLock servers—while maintaining resilient cloud backup capabilities. Available in Sovereign and HighRisk tiers, this security framework transforms vulnerable seed phrase storage into an unassailable digital fortress.

How It Works

  • Split-Entry Security Protocol: Enforces mnemonic entry in two independent halves, preventing single-device compromise vectors while validating against canonical BIP-39 wordlists with real-time checksum verification.
  • Independent Cryptographic Isolation: Each mnemonic half undergoes separate AES-256-GCM encryption with unique initialization vectors, creating mathematically unrelated ciphertexts that cannot be correlated even if intercepted.
  • Zero-Knowledge Server Architecture: Encrypted halves stored as opaque binary objects within isolated Spaces, with servers maintaining zero metadata about content type, relationships, or cryptographic purpose.
  • Authenticated Multi-Factor Retrieval: Recovery requires cascading authentication ceremonies—FIDO2/WebAuthn verification, PIN entry, and explicit consent—with optional split-device reconstruction preventing full mnemonic assembly on any single endpoint.

Security Implications

  • Distributed Trust Enforcement: Split-storage architecture ensures mathematical impossibility of seed phrase reconstruction without authenticated access to both encrypted halves, eliminating single points of failure.
  • Server-Blind Cryptography: Zero-knowledge design prevents server-side correlation attacks, with encrypted payloads indistinguishable from random noise without client-side decryption keys.
  • Memory Sanitization: Client-side implementation enforces immediate cryptographic erasure of plaintext mnemonics from memory after viewing, preventing residual data extraction.

Use Cases

  • Hardware Wallet Recovery Protection: Sovereign tier users secure Ledger and Trezor recovery phrases with split-encryption, maintaining cloud resilience while preventing physical theft vulnerabilities.
  • Multi-Wallet Security Management: HighRisk tier cryptocurrency traders isolate multiple seed phrases across segregated Spaces with distinct access controls and authentication requirements.
  • Estate Planning Integration: Combined with LegacyLink, enables secure seed phrase inheritance without exposing keys during the owner's lifetime or requiring technical expertise from beneficiaries.

Why It Matters

SeedSafe Security revolutionizes cryptocurrency recovery key protection by eliminating the traditional vulnerability trade-off between accessibility and security. Through cryptographic splitting, zero-knowledge storage, and authenticated retrieval, it provides bank-vault protection for seed phrases while maintaining the convenience of cloud access—ensuring your recovery keys remain both utterly inaccessible to attackers and reliably available when legitimately needed.

FAQs

Can quantum computers break SeedSafe encryption?

SeedSafe employs AES-256-GCM encryption which remains quantum-resistant for symmetric cryptography. The split-storage architecture adds an additional layer of quantum resilience by requiring multiple independent breaches.

What happens if one device is compromised during split-entry?

Even with one device fully compromised, attackers cannot reconstruct the complete mnemonic without authenticated access to the second half, maintaining security through distributed trust.

How does SeedSafe prevent insider threats at UnoLock?

Zero-knowledge architecture ensures UnoLock employees cannot access, decrypt, or correlate stored mnemonics, as all encryption occurs client-side with keys never transmitted to servers.

Compliance & Privacy Regulations

  • Cryptographic Sovereignty: Client-side encryption ensures complete user control over seed phrases, exceeding GDPR Article 25 requirements for data protection by design and default.
  • Regulatory Audit Trail: Maintains encrypted access logs without exposing seed phrase content, supporting compliance requirements while preserving zero-knowledge guarantees.

Integration with Other Features

  • Post-Quantum Encryption Security: Leverages quantum-resistant symmetric encryption to future-proof seed phrase protection against emerging cryptographic threats.
  • Threat Detection: Runtime monitoring ensures malicious extensions or injected scripts cannot intercept seed phrases during entry or viewing.
  • Spaces: Enables isolated storage environments with granular permission models for organizing multiple seed phrases with role-based access.

Back to Security Overview