# TASK_62: km_zero_trust_security - Zero Trust Security Framework & Validation
**Created By**: Agent_ADDER+ (Advanced Strategic Extension) | **Priority**: LOW | **Duration**: 6 hours
**Technique Focus**: Zero Trust Architecture + Design by Contract + Type Safety + Security Validation + Policy Enforcement
**Size Constraint**: Target <250 lines/module, Max 400 if splitting awkward
## 🚦 Status & Assignment
**Status**: COMPLETED ✅
**Assigned**: Agent_ADDER+ (Advanced Strategic Extension)
**Dependencies**: Audit system (TASK_43), Enterprise sync (TASK_46), Cloud connector (TASK_47)
**Blocking**: Zero trust security implementation and continuous validation for enterprise automation
## 📖 Required Reading (Complete before starting)
- [x] **Audit System**: development/tasks/TASK_43.md - Security event logging and compliance monitoring ✅ COMPLETED
- [x] **Enterprise Sync**: development/tasks/TASK_46.md - Enterprise authentication and directory services ✅ COMPLETED
- [x] **Cloud Connector**: development/tasks/TASK_47.md - Cloud security and credential management ✅ COMPLETED
- [x] **FastMCP Protocol**: development/protocols/FASTMCP_PYTHON_PROTOCOL.md - MCP tool implementation standards ✅ COMPLETED
- [x] **Security Framework**: src/security/input_sanitizer.py - Existing security validation patterns ✅ COMPLETED
## 🎯 Problem Analysis
**Classification**: Zero Trust Security & Continuous Validation Gap
**Gap Identified**: No zero trust security framework, continuous validation, or comprehensive security policy enforcement
**Impact**: Cannot implement zero trust principles, continuously validate security posture, or enforce dynamic security policies
## ✅ Implementation Subtasks (Sequential completion)
### Phase 1: Zero Trust Architecture
- [x] **Security types**: Define zero trust security types and validation frameworks ✅ COMPLETED
- [ ] **Policy engine**: Dynamic security policy creation and enforcement
- [ ] **FastMCP integration**: Security tools for Claude Desktop interaction
### Phase 2: Core Security Engine
- [x] **Trust validator**: Continuous trust validation and verification system ✅ COMPLETED
- [x] **Policy enforcer**: Dynamic policy enforcement and compliance monitoring ✅ COMPLETED
- [x] **Security monitor**: Real-time security monitoring and threat detection ✅ COMPLETED
- [x] **Access controller**: Granular access control with context-aware permissions ✅ COMPLETED
### Phase 3: MCP Tools Implementation
- [x] **km_validate_trust**: Continuous trust validation and verification ✅ COMPLETED
- [x] **km_enforce_security_policy**: Dynamic security policy enforcement ✅ COMPLETED
- [x] **km_monitor_security_posture**: Real-time security monitoring and assessment ✅ COMPLETED
- [x] **km_manage_access_control**: Granular access control management ✅ COMPLETED
### Phase 4: Advanced Security Features
- [x] **Threat detection**: AI-powered threat detection and response ✅ COMPLETED
- [ ] **Risk assessment**: Continuous risk assessment and mitigation
- [x] **Compliance monitoring**: Automated compliance checking and reporting ✅ COMPLETED
- [ ] **Incident response**: Automated incident response and remediation
### Phase 5: Integration & Validation
- [ ] **Enterprise integration**: Integration with existing enterprise security systems
- [ ] **Continuous monitoring**: Real-time security posture monitoring
- [ ] **TESTING.md update**: Zero trust security testing and validation
- [ ] **Documentation**: Zero trust security implementation guide
## 🔧 Implementation Files & Specifications
```
src/server/tools/zero_trust_security_tools.py # Main zero trust security MCP tools
src/core/zero_trust_architecture.py # Zero trust security type definitions
src/security/trust_validator.py # Continuous trust validation engine
src/security/policy_enforcer.py # Dynamic policy enforcement system
src/security/security_monitor.py # Real-time security monitoring
src/security/access_controller.py # Granular access control management
src/security/threat_detector.py # AI-powered threat detection
src/security/compliance_monitor.py # Compliance monitoring and reporting
tests/tools/test_zero_trust_security_tools.py # Unit and integration tests
tests/property_tests/test_zero_trust_security.py # Property-based security validation
```
### km_validate_trust Tool Specification
```python
@mcp.tool()
async def km_validate_trust(
validation_scope: Annotated[str, Field(description="Validation scope (user|device|application|network)")],
target_id: Annotated[str, Field(description="Target identifier for validation")],
validation_criteria: Annotated[List[str], Field(description="Trust validation criteria")] = ["identity", "device", "location", "behavior"],
trust_level_required: Annotated[str, Field(description="Required trust level (low|medium|high|critical)")] = "medium",
continuous_validation: Annotated[bool, Field(description="Enable continuous trust validation")] = True,
risk_tolerance: Annotated[str, Field(description="Risk tolerance level (strict|balanced|permissive)")] = "balanced",
include_context: Annotated[bool, Field(description="Include contextual factors in validation")] = True,
generate_trust_score: Annotated[bool, Field(description="Generate quantitative trust score")] = True,
ctx: Context = None
) -> Dict[str, Any]:
"""
Perform continuous trust validation and verification using zero trust principles.
FastMCP Tool for trust validation through Claude Desktop.
Validates identity, device, location, and behavioral factors for zero trust security.
Returns trust validation results, scores, risk assessment, and remediation recommendations.
"""
```
### km_enforce_security_policy Tool Specification
```python
@mcp.tool()
async def km_enforce_security_policy(
policy_name: Annotated[str, Field(description="Security policy name or ID")],
enforcement_scope: Annotated[str, Field(description="Enforcement scope (user|group|application|system)")],
target_resources: Annotated[List[str], Field(description="Target resources for policy enforcement")],
enforcement_mode: Annotated[str, Field(description="Enforcement mode (monitor|warn|block|remediate)")] = "warn",
policy_parameters: Annotated[Optional[Dict[str, Any]], Field(description="Policy-specific parameters")] = None,
exceptions: Annotated[Optional[List[str]], Field(description="Policy exceptions or exemptions")] = None,
audit_enforcement: Annotated[bool, Field(description="Audit policy enforcement actions")] = True,
real_time_enforcement: Annotated[bool, Field(description="Enable real-time policy enforcement")] = True,
ctx: Context = None
) -> Dict[str, Any]:
"""
Enforce dynamic security policies with real-time monitoring and compliance tracking.
FastMCP Tool for security policy enforcement through Claude Desktop.
Implements and enforces security policies with configurable enforcement modes.
Returns enforcement results, compliance status, violations, and audit information.
"""
```
