The Claude Code Configuration System implements defense-in-depth security principles aligned with SOC 2 Type II requirements. This document provides comprehensive security architecture documentation for auditors, security teams, and compliance officers.

1. Security Architecture Overview
2. Authentication & Authorization
3. Data Protection
4. Security Hardening Measures
5. Compliance & Standards
6. Vulnerability Management
7. Audit & Monitoring
8. Incident Response
9. Security Controls Matrix

The system follows these core security principles:

1. Zero Trust Architecture: Never trust, always verify
2. Principle of Least Privilege: Minimal necessary permissions
3. Defense in Depth: Multiple layers of security controls
4. Secure by Default: Security enabled without configuration
5. Fail Secure: System fails to a secure state

┌─────────────────────────────────────────────────┐
│             Application Layer                    │
│  • Input validation                              │
│  • Secret scanning                               │
│  • Code analysis                                 │
├─────────────────────────────────────────────────┤
│           Authentication Layer                   │
│  • AWS SSO integration                           │
│  • Temporary credentials                         │
│  • MFA enforcement                               │
├─────────────────────────────────────────────────┤
│             Network Layer                        │
│  • TLS 1.3 encryption                            │
│  • Certificate pinning                           │
│  • Secure DNS                                    │
├─────────────────────────────────────────────────┤
│           Infrastructure Layer                   │
│  • Secure temp files (mktemp)                    │
│  • Package isolation (pipx)                      │
│  • Environment variable management               │
└─────────────────────────────────────────────────┘

• Protocol: SAML 2.0 / OAuth 2.0 with PKCE
• Token Lifetime: 12 hours (configurable)
• Refresh Strategy: Automatic on session start
• MFA: Enforced at IdP level (PakEnergy SSO)

// Automatic credential refresh implementation
const refreshCredentials = async () => {
  // Check token expiry
  const tokenExpiry = await getTokenExpiry();

  if (tokenExpiry < Date.now() + REFRESH_THRESHOLD) {
    // Refresh using SSO
    await aws.sso.refreshCredentials({
      profile: process.env.AWS_PROFILE,
      region: process.env.AWS_REGION
    });
  }
};

sequenceDiagram
    participant User
    participant Claude Code
    participant AWS SSO
    participant IdP
    participant AWS Bedrock

    User->>Claude Code: Start session
    Claude Code->>AWS SSO: Check credentials
    AWS SSO-->>Claude Code: Expired/Missing
    Claude Code->>User: Open browser
    User->>IdP: Authenticate + MFA
    IdP->>AWS SSO: SAML assertion
    AWS SSO->>Claude Code: Temporary credentials
    Claude Code->>AWS Bedrock: API calls with STS token

• OneDrive: BitLocker (Windows) / FileVault (Mac)
• Configuration Files: OS-level encryption
• Hindsight Database: AES-256-GCM in Azure

• AWS API Calls: TLS 1.3
• Hindsight MCP: HTTPS with cert validation
• Git Operations: SSH or HTTPS

# Pre-write security check (mandatory)
reflect("SOC 2 security scan for content I'm about to write")

# Forbidden patterns (enforced)
- Hardcoded credentials
- API keys in code
- Connection strings with passwords
- Private IP addresses
- Internal URLs
- Base64 encoded secrets

# Environment variables (recommended)
import os
from dotenv import load_dotenv

load_dotenv()
API_KEY = os.environ["API_KEY"]
DB_PASSWORD = os.environ["DB_PASSWORD"]

# AWS Secrets Manager (production)
import boto3

client = boto3.client('secretsmanager')
secret = client.get_secret_value(SecretId='prod/db/password')

# Before (vulnerable to race conditions)
TEMP_FILE="/tmp/claude-install.tmp"

# After (secure)
TEMP_FILE=$(mktemp /tmp/claude-XXXXXXXXXX.tmp)
trap "rm -f $TEMP_FILE" EXIT

Mitigation: Prevents symlink attacks and race conditions

# All downloads use secure flags
curl -fsSL https://example.com/file
# -f: Fail on HTTP errors
# -s: Silent mode
# -S: Show errors
# -L: Follow redirects safely

Mitigation: Prevents partial downloads and injection attacks

# Primary method (isolated environments)
pipx install package-name

# Fallback with system protection
pip install --user --break-system-packages package-name

Mitigation: PEP 668 compliance, prevents system package conflicts

# Automatic architecture detection
ARCH=$(uname -m)
if [[ "$ARCH" == "aarch64" ]] || [[ "$ARCH" == "arm64" ]]; then
    AWS_CLI_URL="https://awscli.amazonaws.com/awscli-exe-linux-aarch64.zip"
else
    AWS_CLI_URL="https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip"
fi

Mitigation: Ensures correct binary installation on ARM systems

All user inputs are validated:

# Profile name validation
validate_profile_name() {
    local profile="$1"
    if [[ ! "$profile" =~ ^[a-zA-Z0-9_-]+$ ]]; then
        echo "❌ Invalid profile name"
        exit 1
    fi
}

# Path validation
validate_path() {
    local path="$1"
    # Prevent directory traversal
    if [[ "$path" == *".."* ]]; then
        echo "❌ Invalid path"
        exit 1
    fi
}

# GitHub Actions security workflow
name: Security Scan
on: [push, pull_request]
jobs:
  security:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - name: Secret Scanning
        run: |
          pip install truffleHog3
          trufflehog3 --no-entropy .
      - name: Dependency Scanning
        run: |
          npm audit
          pip-audit

1. Code review for security issues
2. Dependency vulnerability assessment
3. Configuration security audit
4. Penetration testing (annual)

• Installation events
• Authentication attempts
• Configuration changes
• Error conditions
• Security scan results

{
  "timestamp": "2026-01-20T12:00:00Z",
  "level": "INFO",
  "component": "installer",
  "event": "aws_sso_authentication",
  "user": "achau",
  "result": "success",
  "metadata": {
    "profile": "default",
    "region": "us-east-2"
  }
}

• Installation: ~/.claude-install.log
• Session: ~/.claude/logs/session.log
• Security: ~/.claude/logs/security.log

• Automated scanning alerts
• User reports
• Security monitoring

# Immediate actions
1. Rotate compromised credentials
2. Disable affected accounts
3. Isolate affected systems

• Remove malicious code
• Patch vulnerabilities
• Update security controls

• Restore from clean state
• Re-authenticate users
• Verify system integrity

• Document incident
• Update procedures
• Improve controls

DO NOT create public GitHub issues for security vulnerabilities.

1. Email: security@pakenergy.com
2. Include:
   • Description of vulnerability
   • Steps to reproduce
   • Potential impact
   • Suggested fix (optional)

• Acknowledgment: 24 hours
• Initial Assessment: 72 hours
• Resolution Target: Based on severity

Security updates are distributed through:

1. Git repository (private)
2. Email notifications to administrators
3. Automated update checks in installers

• All dependencies updated
• Security scans passing
• No hardcoded secrets
• Input validation implemented
• Error handling secure
• Logs sanitized

• AWS SSO configured
• MFA enabled
• Monitoring active
• Backups configured
• Incident response ready
• Documentation current

1. Installation logs
2. Security scan reports
3. Access control lists
4. Configuration baselines
5. Incident reports
6. Training records

• SOC 2 Type II: In preparation
• ISO 27001: Not pursued
• FedRAMP: Not applicable

Classification: Internal Use Only Version: 1.0.0 Last Updated: 2026-01-20 Next Review: 2026-04-20 Owner: Security Team Approver: CISO