• RSA-4096: Asymmetric encryption with 4096-bit keys
• AES-256-GCM: Authenticated encryption with 256-bit keys
• Argon2: Password-based key derivation function
• CSPRNG: Cryptographically secure random number generation

• Memory Protection: Secure deletion of sensitive data
• Key Management: Password-protected private keys
• Audit Logging: Comprehensive security event tracking
• Input Validation: Protection against malformed data
• Error Handling: Secure failure modes

Please DO NOT report security vulnerabilities through public GitHub issues.

Instead, please send an email to:

• Email: [email protected]
• PGP Key: Available at https://keys.openpgp.org/

Please include the following information:

1. Description of the vulnerability
2. Steps to reproduce the issue
3. Potential impact assessment
4. Suggested fix (if available)
5. Your contact information

• Acknowledgment: Within 24 hours
• Initial Assessment: Within 72 hours
• Detailed Response: Within 1 week
• Fix Release: Within 2 weeks (for critical issues)

• Strong Passwords: Use 12+ character passwords with symbols
• Key Backup: Store backups in secure, separate locations
• Key Rotation: Rotate keys every 90 days
• Access Control: Limit who has access to private keys

• Air-Gapped Systems: Use offline systems for maximum security
• Regular Updates: Keep NovaEncryptor updated to latest version
• Audit Reviews: Regularly review audit logs
• Secure Deletion: Use secure file deletion for sensitive data

• Virtual Environment: Always use isolated Python environments
• File Permissions: Ensure proper file system permissions
• Network Isolation: Avoid network exposure during crypto operations
• Physical Security: Protect systems with sensitive keys

• Input Validation: Validate all user inputs
• Error Handling: Implement secure error handling
• Memory Management: Use secure memory operations
• Dependency Management: Keep dependencies updated

• Security Testing: Include security-focused test cases
• Penetration Testing: Regular security assessments
• Code Review: Peer review for security issues
• Static Analysis: Use security scanning tools

• NIST SP 800-57: Key management guidelines
• FIPS 140-2: Cryptographic module standards
• Common Criteria: Security evaluation criteria
• ISO 27001: Information security management

NovaEncryptor provides features to support security audits:

• Comprehensive logging of all cryptographic operations
• Immutable audit trails with timestamps
• Key lifecycle tracking and rotation logs
• Access control monitoring

• Data Interception: AES-256-GCM provides confidentiality
• Data Tampering: GCM mode provides authentication
• Key Compromise: RSA-4096 provides forward secrecy
• Password Attacks: Argon2 provides resistance
• Memory Dumps: Secure deletion prevents exposure

• Physical Access: Does not protect against physical compromise
• Side-Channel Attacks: Not hardened against timing attacks
• Quantum Computing: Not post-quantum secure
• Social Engineering: Relies on proper key management

• Trusted Execution Environment: Assumes secure OS/hardware
• Secure Random Number Generation: Relies on OS entropy
• Cryptographic Library Security: Trusts PyCA Cryptography
• User Competence: Assumes proper usage by users

Run security tests with:

# Security static analysis
bandit -r src/nova_encryptor.py

# Dependency vulnerability check
safety check

# Code quality analysis
flake8 src/nova_encryptor.py

# Comprehensive test suite
python -m pytest tests/ -v

1. Key Generation: Verify randomness and strength
2. Encryption/Decryption: Test with various message sizes
3. Password Protection: Test with different password strengths
4. Error Conditions: Test failure modes

1. Memory Leaks: Check for sensitive data in memory
2. File Permissions: Verify secure file access
3. Audit Logs: Validate logging completeness
4. Input Validation: Test with malformed inputs

• Cryptographic Review: All algorithms properly implemented
• Key Management Review: Secure key generation and storage
• Memory Security Review: Proper cleanup of sensitive data
• Input Validation Review: All inputs properly validated
• Error Handling Review: Secure failure modes
• Audit Logging Review: Comprehensive event tracking
• Dependency Review: All dependencies up-to-date
• Static Analysis: Clean security scan results
• Dynamic Testing: All security tests passing
• Documentation Review: Security guidance complete

• Environment Hardening: Secure deployment environment
• Access Controls: Proper user access management
• Monitoring Setup: Security monitoring configured
• Backup Strategy: Secure key backup procedures
• Incident Response: Response plan in place
• User Training: Security training completed

• NIST Cryptographic Standards
• PyCA Cryptography Documentation
• Argon2 Specification

• OWASP Cryptographic Storage Cheat Sheet
• NIST Key Management Guidelines
• Secure Coding Practices

For questions about this security policy, contact: [email protected]