Privacy Policy

Last updated: June 25, 2025

Welcome to Seven Problems, a blog dedicated to the P=NP problem and computational complexity. This Privacy Policy explains how we collect, use, and protect your data in accordance with Swiss data protection regulations.

Data we collect

We collect limited data to improve the site and ensure its security:

Anonymized usage data: We use analytics tools (e.g., Google Analytics) to collect anonymized information, such as pages visited or session duration. IP addresses are anonymized.
Technical data: We collect information like IP addresses or browser details to protect the site from attacks and optimize its performance.
Cookies: We use technical cookies for site functionality (e.g., language preferences) and analytical cookies for statistics, only with your consent.

Our blog does not have comments or contact forms, so we do not collect data such as names or email addresses.

Why we collect this data

Site improvement: Anonymized data helps us understand how users interact with the site.
Security: Technical data protects the site from cyber attacks.
Functionality: Technical cookies ensure the site works properly.

Legal basis

We collect data based on:

Consent: For analytical cookies, obtained through the cookie banner.
Legitimate interest: For site security and optimization.
Technical necessity: For essential cookies.

Data sharing

We do not share your data with anyone, except with:

Analytics tools (e.g., Google Analytics), which use anonymized data for statistics.
Technical services (e.g., hosting or security), only to keep the site running.

These services are configured to protect your data.

Data retention

We keep data only for as long as necessary:

Analytical data: up to 14 months.
Technical security data: up to 30 days.
Technical cookies: until browser closure or as per settings.

Your rights

You can:

Request access to your data.
Request correction or deletion.
Withdraw consent for analytical cookies.

Cookies

We use:

Technical cookies: Necessary for site functionality (e.g., language preferences).
Analytical cookies: For anonymized statistics, only with your consent.

On your first visit, a banner allows you to accept non-essential cookies. You can change your preferences at any time through your browser settings.

Security

We use measures like encryption and firewalls to protect your data.

Updates

We may update this Privacy Policy. Changes will be posted here with the updated date.

Contact

For privacy questions, contact us at: info@dennys.stauffer.ch