{# # Jinja2 template for the PyDIET ETC privacy modal window. # # Copyright CFHT/CNRS/OSUPS/CEA/UParisSaclay # Licensed under the MIT licence #} Privacy Policy

Last updated: March 17, 2026

This Privacy Policy describes how PyDIET (“the Service”), operated by CFHT, a U.S.-based non-profit research organization, collects and uses information when you access or use the Service.

1. Scope of the Service

The Service is an academic web-based exposure time calculator accessible worldwide. It does not require user accounts or authentication.

2. Information We Collect

a. Information you provide

The Service does not require or collect personal information such as names, email addresses, or account credentials.

b. Automatically collected information

When you access the Service, our servers may automatically record limited technical information in standard server logs, including:

  • IP address
  • Date and time of requests
  • Requested URLs and query parameters
  • HTTP method (GET/POST)
  • User agent (browser or client information)

This information is collected solely for operational, security, and debugging purposes.

c. Local storage

The Service may use your browser’s local storage to save application settings, such as preferences. This data remains on your device and is not transmitted to our servers.

3. Use of Information

We use the limited data we collect to:

  • Operate and maintain the Service
  • Monitor performance and ensure security
  • Diagnose technical issues and improve functionality

We do not use your data for profiling, advertising, or marketing purposes.

4. Legal Basis for Processing (EEA/UK users)

For users in the European Economic Area or the United Kingdom, processing of technical log data is based on our legitimate interests in ensuring the security, stability, and proper functioning of the Service.

5. Data Retention

Server logs are retained only for the minimum period required by applicable laws and institutional policies, after which they are deleted or anonymized.

6. Data Sharing

We do not sell, rent, or share personal data with third parties.

Data may be disclosed only if required by law or as reasonably necessary to protect the security and integrity of the Service.

7. International Users

The Service is operated from the United States. By using the Service, you acknowledge that technical information described in this Privacy Policy may be processed in the United States.

8. Your Rights

Depending on your jurisdiction, you may have rights regarding your personal data, including rights to access, correct, delete, or object to certain processing.

Because we do not maintain user accounts or directly identifiable user profiles, we may not be able to link technical log data to a specific individual except where required by law and reasonably feasible.

9. Children’s Privacy

The Service is intended for academic and general audiences and does not knowingly collect personal data from children.

10. Security

We implement reasonable technical and organizational measures to protect the Service and associated data, including standard web security practices.

11. Changes to This Policy

This Privacy Policy may be updated from time to time. Updates will be posted on this page with a revised “Last updated” date.

12. Contact

For questions about this Privacy Policy, please contact:

info@cfht.hawaii.edu