========
Security
========

This page provides information about ICOS-FL's security considerations and practices.

Data Privacy
------------

ICOS-FL is designed with data privacy in mind, particularly through its federated learning approach:

1. **Local Data Processing**: System metrics data remains on the local node
2. **Model-Only Exchange**: Only model parameters are exchanged, not raw data
3. **Sliding Window**: Only a limited history of metrics is maintained
4. **Data Minimization**: Only necessary metrics are collected and processed

Network Security
----------------

When deploying ICOS-FL, consider these network security measures:

1. **Transport Layer Security**: Configure TLS for inter-node communication
2. **Network Isolation**: Use Docker networks to isolate components
3. **Firewall Configuration**: Restrict access to essential ports only
4. **Access Control**: Implement proper authentication for API access

.. code-block:: yaml

   # Example secure configuration for docker-compose.yml
   services:
     proxy:
       networks:
         - dataclay-network
       ports:
         # Only expose necessary ports
         - 127.0.0.1:8676:8676

   networks:
     dataclay-network:
       driver: bridge

For production deployments, TLS can be enabled for Flower communication:

.. code-block:: toml

   [tool.flwr.federations.secure-deployment]
   address = "127.0.0.1:9093"
   insecure = false
   certificates = "/path/to/certificates"

Container Security
------------------

To enhance Docker container security:

1. **Non-root Users**: Run containers as non-root users
2. **Read-only Filesystems**: Mount filesystems as read-only when possible
3. **Resource Limits**: Set CPU and memory limits
4. **Minimal Images**: Use minimal base images
5. **Container Scanning**: Scan images for vulnerabilities

Example Docker configuration:

.. code-block:: yaml

   services:
     bridge:
       user: nonroot
       read_only: true
       tmpfs:
         - /tmp
       security_opt:
         - no-new-privileges:true
       deploy:
         resources:
           limits:
             cpus: '1.0'
             memory: 1G

Dependency Management
---------------------

ICOS-FL manages dependencies securely:

1. **Dependency Pinning**: Pin dependencies to specific versions
2. **Vulnerability Scanning**: Regularly scan dependencies for vulnerabilities
3. **Minimal Dependencies**: Include only necessary dependencies
4. **Dependency Updates**: Keep dependencies up-to-date

You can scan dependencies for vulnerabilities:

.. code-block:: bash

   pip install safety
   safety check

Advanced Privacy Techniques
---------------------------

For enhanced privacy, ICOS-FL can be extended with:

1. **Differential Privacy**: Add noise to model updates
2. **Secure Aggregation**: Cryptographically secure parameter aggregation
3. **Homomorphic Encryption**: Operate on encrypted model parameters
4. **Federated Dropout**: Randomly drop model components during training

Implementation example for differential privacy:

.. code-block:: python

   def add_noise(parameters, noise_scale=0.01):
       """Add Gaussian noise to model parameters for differential privacy."""
       noisy_parameters = []
       for param in parameters:
           noise = np.random.normal(0, noise_scale, param.shape)
           noisy_parameters.append(param + noise)
       return noisy_parameters

Authentication and Authorization
--------------------------------

For multi-tenant deployments, implement appropriate authentication:

1. **API Authentication**: Require authentication for API access
2. **Client Validation**: Validate clients before allowing participation
3. **Role-Based Access**: Implement different access levels for different users
4. **Token-Based Auth**: Use tokens for secure authentication

Security Best Practices
-----------------------

General security recommendations:

1. **Principle of Least Privilege**: Grant minimal necessary permissions
2. **Regular Updates**: Keep all software components updated
3. **Security Logs**: Maintain logs for security-relevant events
4. **Input Validation**: Validate all inputs to prevent injection attacks
5. **Secure Configuration**: Use secure default configurations

Reporting Security Issues
-------------------------

If you discover a security vulnerability in ICOS-FL, please follow these steps:

1. **Do not publicly disclose the issue** until it has been addressed
2. Email security concerns to [security contact email]
3. Include detailed information about the vulnerability
4. Allow time for the issue to be addressed before disclosure

We appreciate your help in keeping ICOS-FL secure!