security

SCRIBE Security and Compliance Guide

Security Overview

This guide covers all aspects of security for the SCRIBE Resonance AI System, including authentication, authorization, data protection, and compliance requirements. SCRIBE is designed with security as a fundamental principle.

Security Architecture

Security Layers

┌─────────────────────────────────────────────────────────────┐
│                    Application Security Layer                  │
├─────────────────────────────────────────────────────────────┤
│                    API Security Layer                         │
├─────────────────────────────────────────────────────────────┤
│                    Data Security Layer                         │
├─────────────────────────────────────────────────────────────┤
│                    Network Security Layer                       │
├─────────────────────────────────────────────────────────────┤
│                    System Security Layer                       │
└─────────────────────────────────────────────────────────────┘

Security Components

• Authentication: Verify user identity
• Authorization: Control access to resources
• Encryption: Protect data at rest and in transit
• Auditing: Track security events
• Monitoring: Detect security threats
• Compliance: Meet regulatory requirements

Authentication and Authorization

API Authentication

{
  "security": {
    "api_key_required": true,
    "api_key": "your-secret-key-here",
    "api_key_rotation_days": 90,
    "session_timeout": 3600,
    "max_login_attempts": 5,
    "lockout_duration": 900
  }
}

API Key Management

import hashlib
import secrets
from datetime import datetime, timedelta
from typing import Dict, Optional

class APIKeyManager:
    def __init__(self):
        self.api_keys = {}
        self.key_usage = {}
    
    def generate_api_key(self, user_id: str, permissions: list) -> str:
        """Generate a new API key"""
        # Generate random key
        key = secrets.token_urlsafe(32)
        
        # Hash key for storage
        key_hash = hashlib.sha256(key.encode()).hexdigest()
        
        # Store key metadata
        self.api_keys[key_hash] = {
            'user_id': user_id,
            'permissions': permissions,
            'created_at': datetime.now(),
            'expires_at': datetime.now() + timedelta(days=90),
            'last_used': None,
            'usage_count': 0
        }
        
        return key
    
    def validate_api_key(self, api_key: str) -> Optional[Dict]:
        """Validate API key and return metadata"""
        key_hash = hashlib.sha256(api_key.encode()).hexdigest()
        
        if key_hash not in self.api_keys:
            return None
        
        key_data = self.api_keys[key_hash]
        
        # Check expiration
        if datetime.now() > key_data['expires_at']:
            return None
        
        # Update usage
        key_data['last_used'] = datetime.now()
        key_data['usage_count'] += 1
        
        return key_data
    
    def revoke_api_key(self, api_key: str) -> bool:
        """Revoke an API key"""
        key_hash = hashlib.sha256(api_key.encode()).hexdigest()
        
        if key_hash in self.api_keys:
            del self.api_keys[key_hash]
            return True
        
        return False

JWT Authentication

import jwt
import bcrypt
from datetime import datetime, timedelta

class JWTAuthenticator:
    def __init__(self, secret_key: str):
        self.secret_key = secret_key
        self.algorithm = 'HS256'
        self.token_expiry = timedelta(hours=24)
    
    def hash_password(self, password: str) -> str:
        """Hash password using bcrypt"""
        salt = bcrypt.gensalt()
        return bcrypt.hashpw(password.encode(), salt).decode()
    
    def verify_password(self, password: str, hashed: str) -> bool:
        """Verify password against hash"""
        return bcrypt.checkpw(password.encode(), hashed.encode())
    
    def generate_token(self, user_id: str, permissions: list) -> str:
        """Generate JWT token"""
        payload = {
            'user_id': user_id,
            'permissions': permissions,
            'exp': datetime.utcnow() + self.token_expiry,
            'iat': datetime.utcnow()
        }
        
        return jwt.encode(payload, self.secret_key, algorithm=self.algorithm)
    
    def verify_token(self, token: str) -> Optional[Dict]:
        """Verify JWT token"""
        try:
            payload = jwt.decode(token, self.secret_key, algorithms=[self.algorithm])
            return payload
        except jwt.ExpiredSignatureError:
            return None
        except jwt.InvalidTokenError:
            return None

Role-Based Access Control (RBAC)

from enum import Enum
from typing import Set, List

class Permission(Enum):
    READ_SCANS = "read_scans"
    WRITE_SCANS = "write_scans"
    DELETE_SCANS = "delete_scans"
    READ_CONFIG = "read_config"
    WRITE_CONFIG = "write_config"
    ADMIN = "admin"

class Role:
    def __init__(self, name: str, permissions: Set[Permission]):
        self.name = name
        self.permissions = permissions

# Define roles
ROLES = {
    'viewer': Role('viewer', {Permission.READ_SCANS}),
    'operator': Role('operator', {
        Permission.READ_SCANS, 
        Permission.WRITE_SCANS,
        Permission.READ_CONFIG
    }),
    'admin': Role('admin', set(Permission))
}

class RBAC:
    def __init__(self):
        self.user_roles = {}
    
    def assign_role(self, user_id: str, role_name: str):
        """Assign role to user"""
        if role_name not in ROLES:
            raise ValueError(f"Role {role_name} not found")
        
        self.user_roles[user_id] = ROLES[role_name]
    
    def has_permission(self, user_id: str, permission: Permission) -> bool:
        """Check if user has permission"""
        if user_id not in self.user_roles:
            return False
        
        return permission in self.user_roles[user_id].permissions
    
    def get_user_permissions(self, user_id: str) -> Set[Permission]:
        """Get all permissions for user"""
        if user_id not in self.user_roles:
            return set()
        
        return self.user_roles[user_id].permissions

Data Security

Encryption at Rest

from cryptography.fernet import Fernet
from cryptography.hazmat.primitives import hashes
from cryptography.hazmat.primitives.kdf.pbkdf2 import PBKDF2HMAC
import base64
import os

class DataEncryption:
    def __init__(self, password: str):
        # Generate key from password
        salt = os.urandom(16)
        kdf = PBKDF2HMAC(
            algorithm=hashes.SHA256(),
            length=32,
            salt=salt,
            iterations=100000,
        )
        key = base64.urlsafe_b64encode(kdf.derive(password.encode()))
        
        self.cipher = Fernet(key)
        self.salt = salt
    
    def encrypt_data(self, data: str) -> str:
        """Encrypt data"""
        encrypted_data = self.cipher.encrypt(data.encode())
        return base64.urlsafe_b64encode(encrypted_data).decode()
    
    def decrypt_data(self, encrypted_data: str) -> str:
        """Decrypt data"""
        encrypted_bytes = base64.urlsafe_b64decode(encrypted_data.encode())
        decrypted_data = self.cipher.decrypt(encrypted_bytes)
        return decrypted_data.decode()
    
    def encrypt_file(self, file_path: str, output_path: str):
        """Encrypt file"""
        with open(file_path, 'rb') as f:
            file_data = f.read()
        
        encrypted_data = self.cipher.encrypt(file_data)
        
        with open(output_path, 'wb') as f:
            f.write(encrypted_data)
    
    def decrypt_file(self, encrypted_path: str, output_path: str):
        """Decrypt file"""
        with open(encrypted_path, 'rb') as f:
            encrypted_data = f.read()
        
        decrypted_data = self.cipher.decrypt(encrypted_data)
        
        with open(output_path, 'wb') as f:
            f.write(decrypted_data)

Database Security

import sqlite3
import hashlib
from contextlib import contextmanager

class SecureDatabase:
    def __init__(self, db_path: str, encryption_key: str):
        self.db_path = db_path
        self.encryption = DataEncryption(encryption_key)
        self._secure_database()
    
    def _secure_database(self):
        """Secure database configuration"""
        with sqlite3.connect(self.db_path) as conn:
            # Enable foreign keys
            conn.execute("PRAGMA foreign_keys=ON")
            
            # Set secure permissions
            conn.execute("PRAGMA journal_mode=WAL")
            conn.execute("PRAGMA synchronous=FULL")
            conn.execute("PRAGMA cache_size=1000")
            
            # Create secure tables
            conn.execute("""
                CREATE TABLE IF NOT EXISTS secure_scans (
                    id INTEGER PRIMARY KEY AUTOINCREMENT,
                    scan_data TEXT,  -- Encrypted scan data
                    timestamp DATETIME DEFAULT CURRENT_TIMESTAMP,
                    user_id TEXT,
                    checksum TEXT
                )
            """)
            
            conn.commit()
    
    @contextmanager
    def get_connection(self):
        """Get secure database connection"""
        conn = sqlite3.connect(self.db_path)
        conn.row_factory = sqlite3.Row
        try:
            yield conn
        finally:
            conn.close()
    
    def store_scan_result(self, scan_data: dict, user_id: str):
        """Store encrypted scan result"""
        # Serialize and encrypt data
        import json
        data_json = json.dumps(scan_data)
        encrypted_data = self.encryption.encrypt_data(data_json)
        
        # Calculate checksum
        checksum = hashlib.sha256(data_json.encode()).hexdigest()
        
        with self.get_connection() as conn:
            conn.execute(
                "INSERT INTO secure_scans (scan_data, user_id, checksum) VALUES (?, ?, ?)",
                (encrypted_data, user_id, checksum)
            )
            conn.commit()
    
    def retrieve_scan_result(self, scan_id: int, user_id: str) -> dict:
        """Retrieve and decrypt scan result"""
        with self.get_connection() as conn:
            cursor = conn.execute(
                "SELECT scan_data, checksum FROM secure_scans WHERE id = ? AND user_id = ?",
                (scan_id, user_id)
            )
            row = cursor.fetchone()
            
            if not row:
                raise ValueError("Scan not found or access denied")
            
            # Decrypt data
            decrypted_data = self.encryption.decrypt_data(row['scan_data'])
            scan_data = json.loads(decrypted_data)
            
            # Verify checksum
            checksum = hashlib.sha256(decrypted_data.encode()).hexdigest()
            if checksum != row['checksum']:
                raise ValueError("Data integrity check failed")
            
            return scan_data

SSL/TLS Configuration

from fastapi import FastAPI
from fastapi.middleware.httpsredirect import HTTPSRedirectMiddleware
from fastapi.middleware.trustedhost import TrustedHostMiddleware
import ssl

app = FastAPI()

# Add security middleware
app.add_middleware(HTTPSRedirectMiddleware)
app.add_middleware(
    TrustedHostMiddleware, 
    allowed_hosts=["yourdomain.com", "*.yourdomain.com"]
)

# SSL Configuration
ssl_context = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH)
ssl_context.load_cert_chain(certfile="cert.pem", keyfile="key.pem")
ssl_context.load_verify_locations(cafile="ca.pem")
ssl_context.verify_mode = ssl.CERT_REQUIRED

@app.on_event("startup")
async def startup_event():
    """Configure SSL on startup"""
    import uvicorn
    
    config = uvicorn.Config(
        app="main:app",
        host="0.0.0.0",
        port=443,
        ssl=ssl_context,
        reload=False
    )

Network Security

Firewall Configuration

# UFW Firewall Rules
sudo ufw default deny incoming
sudo ufw default allow outgoing

# Allow SSH
sudo ufw allow 22/tcp

# Allow HTTPS
sudo ufw allow 443/tcp

# Allow HTTP (redirect to HTTPS)
sudo ufw allow 80/tcp

# Allow API (internal only)
sudo ufw allow from 10.0.0.0/8 to any port 8000
sudo ufw allow from 192.168.0.0/16 to any port 8000

# Enable firewall
sudo ufw enable

Nginx Security Configuration

server {
    listen 80;
    server_name yourdomain.com;
    return 301 https://$server_name$request_uri;
}

server {
    listen 443 ssl http2;
    server_name yourdomain.com;
    
    # SSL Configuration
    ssl_certificate /path/to/cert.pem;
    ssl_certificate_key /path/to/key.pem;
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_ciphers ECDHE-RSA-AES256-GCM-SHA512:DHE-RSA-AES256-GCM-SHA512;
    ssl_prefer_server_ciphers off;
    ssl_session_cache shared:SSL:10m;
    ssl_session_timeout 10m;
    
    # Security Headers
    add_header X-Frame-Options DENY;
    add_header X-Content-Type-Options nosniff;
    add_header X-XSS-Protection "1; mode=block";
    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains";
    add_header Content-Security-Policy "default-src 'self'";
    
    # Rate Limiting
    limit_req_zone $binary_remote_addr zone=api:10m rate=10r/s;
    limit_req zone=api burst=20 nodelay;
    
    location / {
        limit_req zone=api;
        proxy_pass http://127.0.0.1:8000;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
    }
}

DDoS Protection

from fastapi import Request, HTTPException
from slowapi import Limiter, _rate_limit_exceeded_handler
from slowapi.util import get_remote_address
from slowapi.errors import RateLimitExceeded

# Rate limiter
limiter = Limiter(key_func=get_remote_address)

app.state.limiter = limiter
app.add_exception_handler(RateLimitExceeded, _rate_limit_exceeded_handler)

@app.post("/scan")
@limiter.limit("10/minute")
async def scan_endpoint(request: Request):
    """Scan endpoint with rate limiting"""
    # Implementation here
    pass

# Advanced DDoS protection
class DDoSProtection:
    def __init__(self):
        self.request_counts = {}
        self.blocked_ips = {}
    
    def check_request(self, ip: str) -> bool:
        """Check if request should be allowed"""
        current_time = time.time()
        
        # Check if IP is blocked
        if ip in self.blocked_ips:
            if current_time < self.blocked_ips[ip]:
                return False
            else:
                del self.blocked_ips[ip]
        
        # Count requests in last minute
        if ip not in self.request_counts:
            self.request_counts[ip] = []
        
        # Remove old requests
        self.request_counts[ip] = [
            req_time for req_time in self.request_counts[ip]
            if current_time - req_time < 60
        ]
        
        # Check rate limit
        if len(self.request_counts[ip]) > 100:  # 100 requests per minute
            # Block IP for 1 hour
            self.blocked_ips[ip] = current_time + 3600
            return False
        
        self.request_counts[ip].append(current_time)
        return True

Security Monitoring

Intrusion Detection

import logging
from datetime import datetime
from typing import Dict, List

class SecurityMonitor:
    def __init__(self):
        self.logger = logging.getLogger("security")
        self.security_events = []
        self.alert_thresholds = {
            'failed_logins': 5,
            'suspicious_requests': 10,
            'unauthorized_access': 1
        }
    
    def log_security_event(self, event_type: str, details: Dict):
        """Log security event"""
        event = {
            'timestamp': datetime.now(),
            'type': event_type,
            'details': details
        }
        
        self.security_events.append(event)
        
        # Check for alerts
        self.check_alerts(event_type)
        
        # Log event
        self.logger.warning(f"Security event: {event_type} - {details}")
    
    def check_alerts(self, event_type: str):
        """Check if event should trigger alert"""
        recent_events = [
            event for event in self.security_events
            if event['type'] == event_type and
            (datetime.now() - event['timestamp']).total_seconds() < 300  # 5 minutes
        ]
        
        threshold = self.alert_thresholds.get(event_type, 10)
        
        if len(recent_events) >= threshold:
            self.send_alert(event_type, len(recent_events))
    
    def send_alert(self, event_type: str, count: int):
        """Send security alert"""
        alert_message = f"Security Alert: {count} {event_type} events in 5 minutes"
        
        # Send to monitoring system
        print(f"ALERT: {alert_message}")
        
        # Could integrate with external alerting systems
        # - Email notifications
        # - Slack alerts
        # - SMS notifications
        # - PagerDuty

Audit Logging

import json
from datetime import datetime

class AuditLogger:
    def __init__(self, log_file: str = "audit.log"):
        self.log_file = log_file
    
    def log_action(self, user_id: str, action: str, resource: str, details: Dict = None):
        """Log user action for audit"""
        audit_entry = {
            'timestamp': datetime.now().isoformat(),
            'user_id': user_id,
            'action': action,
            'resource': resource,
            'details': details or {},
            'ip_address': self._get_client_ip()
        }
        
        # Write to audit log
        with open(self.log_file, 'a') as f:
            f.write(json.dumps(audit_entry) + '\n')
    
    def _get_client_ip(self) -> str:
        """Get client IP address"""
        # Implementation depends on your framework
        return "127.0.0.1"
    
    def get_audit_trail(self, user_id: str = None, start_time: datetime = None) -> List[Dict]:
        """Get audit trail"""
        audit_entries = []
        
        with open(self.log_file, 'r') as f:
            for line in f:
                try:
                    entry = json.loads(line.strip())
                    
                    # Filter by user_id if specified
                    if user_id and entry.get('user_id') != user_id:
                        continue
                    
                    # Filter by start_time if specified
                    if start_time:
                        entry_time = datetime.fromisoformat(entry['timestamp'])
                        if entry_time < start_time:
                            continue
                    
                    audit_entries.append(entry)
                    
                except json.JSONDecodeError:
                    continue
        
        return audit_entries

Compliance Requirements

GDPR Compliance

from datetime import datetime, timedelta

class GDPRCompliance:
    def __init__(self):
        self.data_subject_requests = []
    
    def consent_required(self) -> bool:
        """Check if consent is required for data processing"""
        return True
    
    def record_consent(self, user_id: str, consent_data: Dict):
        """Record user consent"""
        consent_entry = {
            'user_id': user_id,
            'timestamp': datetime.now(),
            'consent_given': consent_data['consent'],
            'purpose': consent_data['purpose'],
            'retention_period': consent_data.get('retention_period', 365)
        }
        
        # Store consent record
        self._store_consent(consent_entry)
    
    def right_to_be_forgotten(self, user_id: str):
        """Delete all user data (right to be forgotten)"""
        # Delete from database
        self._delete_user_data(user_id)
        
        # Delete from logs (if necessary)
        self._anonymize_logs(user_id)
        
        # Record deletion request
        self._record_deletion_request(user_id)
    
    def data_portability(self, user_id: str) -> Dict:
        """Export user data (right to data portability)"""
        user_data = {
            'personal_data': self._get_personal_data(user_id),
            'scan_history': self._get_scan_history(user_id),
            'preferences': self._get_user_preferences(user_id),
            'consent_records': self._get_consent_records(user_id)
        }
        
        return user_data
    
    def retain_data_policy(self, data_type: str) -> int:
        """Get data retention policy in days"""
        policies = {
            'scan_data': 365,      # 1 year
            'user_preferences': 1825,  # 5 years
            'audit_logs': 2555,      # 7 years
            'consent_records': 2555  # 7 years
        }
        
        return policies.get(data_type, 365)

SOC 2 Compliance

class SOC2Compliance:
    def __init__(self):
        self.security_controls = {
            'access_control': self._validate_access_control,
            'encryption': self._validate_encryption,
            'audit_logging': self._validate_audit_logging,
            'incident_response': self._validate_incident_response,
            'vulnerability_management': self._validate_vulnerability_management
        }
    
    def validate_compliance(self) -> Dict[str, bool]:
        """Validate SOC 2 compliance"""
        results = {}
        
        for control_name, validator in self.security_controls.items():
            try:
                results[control_name] = validator()
            except Exception as e:
                results[control_name] = False
                logging.error(f"Compliance validation failed for {control_name}: {e}")
        
        return results
    
    def _validate_access_control(self) -> bool:
        """Validate access control implementation"""
        # Check if RBAC is implemented
        # Check if authentication is required
        # Check if session management is secure
        return True  # Implementation specific
    
    def _validate_encryption(self) -> bool:
        """Validate encryption implementation"""
        # Check if data at rest is encrypted
        # Check if data in transit is encrypted
        # Check if key management is secure
        return True  # Implementation specific
    
    def _validate_audit_logging(self) -> bool:
        """Validate audit logging implementation"""
        # Check if all actions are logged
        # Check if logs are tamper-evident
        # Check if log retention policy is enforced
        return True  # Implementation specific

Incident Response

Security Incident Response Plan

from enum import Enum
from datetime import datetime

class IncidentSeverity(Enum):
    LOW = "low"
    MEDIUM = "medium"
    HIGH = "high"
    CRITICAL = "critical"

class SecurityIncident:
    def __init__(self, incident_id: str, severity: IncidentSeverity, description: str):
        self.incident_id = incident_id
        self.severity = severity
        self.description = description
        self.created_at = datetime.now()
        self.status = "open"
        self.actions_taken = []
    
    def add_action(self, action: str):
        """Add action taken"""
        self.actions_taken.append({
            'action': action,
            'timestamp': datetime.now()
        })
    
    def resolve(self):
        """Resolve incident"""
        self.status = "resolved"
        self.resolved_at = datetime.now()

class IncidentResponse:
    def __init__(self):
        self.incidents = []
        self.escalation_thresholds = {
            IncidentSeverity.LOW: 24,      # 24 hours
            IncidentSeverity.MEDIUM: 8,     # 8 hours
            IncidentSeverity.HIGH: 2,       # 2 hours
            IncidentSeverity.CRITICAL: 0.5  # 30 minutes
        }
    
    def create_incident(self, severity: IncidentSeverity, description: str) -> SecurityIncident:
        """Create new security incident"""
        incident_id = f"INC-{datetime.now().strftime('%Y%m%d')}-{len(self.incidents) + 1:04d}"
        incident = SecurityIncident(incident_id, severity, description)
        
        self.incidents.append(incident)
        
        # Check for escalation
        self._check_escalation(incident)
        
        return incident
    
    def _check_escalation(self, incident: SecurityIncident):
        """Check if incident should be escalated"""
        threshold = self.escalation_thresholds[incident.severity]
        
        if threshold > 0:
            # Schedule escalation check
            import threading
            threading.Timer(threshold * 3600, self._escalate_incident, args=[incident]).start()
    
    def _escalate_incident(self, incident: SecurityIncident):
        """Escalate incident if not resolved"""
        if incident.status == "open":
            incident.add_action("Escalated due to timeout")
            self._notify_stakeholders(incident)
    
    def _notify_stakeholders(self, incident: SecurityIncident):
        """Notify stakeholders about incident"""
        notification = f"""
        Security Incident Escalation
        
        Incident ID: {incident.incident_id}
        Severity: {incident.severity.value}
        Description: {incident.description}
        Created: {incident.created_at}
        Actions Taken: {len(incident.actions_taken)}
        """
        
        # Send notification based on severity
        if incident.severity in [IncidentSeverity.HIGH, IncidentSeverity.CRITICAL]:
            # Immediate notification
            self._send_immediate_notification(notification)
        else:
            # Email notification
            self._send_email_notification(notification)

Security Configuration

Complete Security Configuration

{
  "security": {
    "authentication": {
      "api_key_required": true,
      "jwt_enabled": true,
      "session_timeout": 3600,
      "max_login_attempts": 5,
      "lockout_duration": 900,
      "password_policy": {
        "min_length": 12,
        "require_uppercase": true,
        "require_lowercase": true,
        "require_numbers": true,
        "require_symbols": true
      }
    },
    "authorization": {
      "rbac_enabled": true,
      "default_role": "viewer",
      "role_hierarchy": ["viewer", "operator", "admin"]
    },
    "encryption": {
      "data_at_rest": true,
      "data_in_transit": true,
      "algorithm": "AES-256-GCM",
      "key_rotation_days": 90
    },
    "network": {
      "ssl_required": true,
      "tls_version": "1.3",
      "allowed_ciphers": [
        "TLS_AES_256_GCM_SHA384",
        "TLS_CHACHA20_POLY1305_SHA256",
        "TLS_AES_128_GCM_SHA256"
      ],
      "rate_limiting": {
        "enabled": true,
        "requests_per_minute": 100,
        "burst_size": 20
      }
    },
    "monitoring": {
      "audit_logging": true,
      "security_events": true,
      "intrusion_detection": true,
      "alert_thresholds": {
        "failed_logins": 5,
        "suspicious_requests": 10,
        "unauthorized_access": 1
      }
    },
    "compliance": {
      "gdpr_enabled": true,
      "data_retention_days": 365,
      "right_to_be_forgotten": true,
      "data_portability": true,
      "audit_retention_days": 2555
    }
  }
}

Security Best Practices

Development Security

• Use parameterized queries to prevent SQL injection
• Validate all input data
• Implement proper error handling
• Use secure coding practices
• Regular security testing

Operational Security

• Regular security audits
• Penetration testing
• Vulnerability scanning
• Security monitoring
• Incident response planning

Data Protection

• Encrypt sensitive data
• Implement access controls
• Regular data backups
• Secure disposal of data
• Privacy by design

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Last Updated: 2026-05-06
Security Guide Version: 1.0.0
Status: Production Ready