Security Model¶

This page documents the comprehensive security model of the 1Password MCP Server.

Security Architecture¶

The 1Password MCP Server implements a defense-in-depth security model with multiple layers of protection.

Core Security Principles¶

• Zero Trust: Never trust, always verify
• Least Privilege: Minimal access rights
• Defense in Depth: Multiple security layers
• Secure by Default: Security-first configuration

Threat Model¶

Assets Protected¶

• Credentials: 1Password vault contents
• Session Data: Temporary authentication tokens
• Communication: MCP protocol messages

Threat Actors¶

• External Attackers: Network-based threats
• Insider Threats: Malicious or compromised clients
• System Compromise: Host-level security breaches

Attack Vectors¶

• Network Attacks: Man-in-the-middle, eavesdropping
• Input Attacks: Injection, malformed requests
• Authentication Bypass: Session hijacking, token theft

Security Controls¶

Authentication¶

• Secure 1Password CLI integration
• Session-based authentication
• Token-based access control

Authorization¶

• Role-based access control
• Resource-level permissions
• Audit trail logging

Data Protection¶

• Encryption in transit
• No persistent credential storage
• Secure memory handling