"""
This module is reserved for future implementation of advanced cryptographic operations.

Current basic encryption (Fernet) and password hashing are implemented in `app.core.encryption` and `app.core.security`.
Future expansion may include:
- Asymmetric encryption (RSA/ECC) for secure communication
- Key management and rotation services
- Integration with Hardware Security Modules (HSM)
- Digital signatures for data integrity verification
"""
