Note: The German version (/cookies) is the legally binding version. This English translation is provided for convenience only.
Cookie Policy
This page explains which cookies and similar technologies are used on sieberedu.com, for what purpose, on what legal basis, and how you can manage or withdraw your consent.
Under § 25 TDDDG (formerly § 25 TTDSG — renamed on 14.05.2024) in conjunction with Art. 6 GDPR, your prior consent is required for cookies that are not strictly technically necessary. We obtain this consent through our cookie banner. Necessary cookies are used on the basis of our legitimate interest (Art. 6(1)(f) GDPR) without requiring consent.
Overview of cookies used
Category: Necessary
These cookies are strictly required for the technical operation of the website. They cannot be deactivated.
__se_consent
| Attribute | Details |
|---|---|
| Provider | sieberedu.com (first party) |
| Duration | 12 months |
| Purpose | Stores your cookie consent (granted/denied categories, timestamp, banner version). Enables us to demonstrate your consent pursuant to Art. 7(1) GDPR. |
| Legal basis | Art. 6(1)(a) (consent evidence) and Art. 6(1)(f) (legitimate interest in fulfilling GDPR accountability obligations) |
Session cookies (Next.js)
| Attribute | Details |
|---|---|
| Provider | sieberedu.com (first party) |
| Duration | Session duration (max. 1 hour) |
| Purpose | Session management and technical operation of the website (Next.js App Router). No tracking. |
| Legal basis | Art. 6(1)(f) — technical necessity for the proper operation of the website |
Category: Preferences
These cookies store your settings to provide a better user experience.
NEXT_LOCALE
| Attribute | Details |
|---|---|
| Provider | sieberedu.com (first party) |
| Duration | 1 year |
| Purpose | Stores your language selection (German/English/Spanish) so you do not need to select again on your next visit. |
| Legal basis | Art. 6(1)(a) GDPR — you actively select the language via the language switcher. |
Category: Necessary (Security)
Cloudflare Turnstile (security check)
| Attribute | Details |
|---|---|
| Provider | Cloudflare, Inc. (US) |
| Duration | Session duration (only during form submission) |
| Purpose | Bot protection when submitting the contact form. Analyses behavioural signals to detect automated abuse submissions. No persistent tracking. |
| Legal basis | Art. 6(1)(f) GDPR — legitimate interest in protecting the contact infrastructure from abuse (LIA-006) |
| Transfer | EU-US Data Privacy Framework (DPF) — Cloudflare is DPF-certified |
Cloudflare Turnstile does not use third-party cookies and avoids extensive browser fingerprinting.
Category: Analytics (consent only)
These cookies are only loaded if you have consented to the use of analytics tools via the cookie banner. Without consent granted, these scripts are not executed in your browser — this is controlled server-side.
Google Analytics 4
| Attribute | Details |
|---|---|
| Provider | Google Ireland Ltd. / Google LLC (US) |
| Cookie names | _ga, _ga_* |
| Duration | 1–2 years (per GA4 standard) |
| Purpose | Measuring website usage (page views, session duration, entry pages). Helps us improve content. |
| Legal basis | Art. 6(1)(a) GDPR (your consent) |
| IP anonymisation | Enabled (anonymize_ip: true) — the full IP address is not transmitted to Google |
| Transfer | EU-US Data Privacy Framework (DPF) |
Microsoft Clarity
| Attribute | Details |
|---|---|
| Provider | Microsoft Corporation (US) |
| Cookie names | _clsk, _clck, MUID |
| Duration | Per Clarity standard (up to 1 year) |
| Purpose | Heatmaps and session replays (anonymised) for improving usability. |
| Legal basis | Art. 6(1)(a) GDPR (your consent) |
| PII masking | Enabled — form fields and personal data are not recorded |
| Transfer | EU-US Data Privacy Framework (DPF) |
Managing and withdrawing consent
You can adjust or withdraw your cookie consent at any time:
- Click "Manage cookies" in the footer of this website.
- Adjust your selection in the consent panel.
- Click "Save settings".
Withdrawal of consent applies to future visits. Scripts already loaded remain active in the current browser session until the next full page load.
Deleting cookies in your browser
You can also delete cookies directly in your browser:
- Chrome: Settings → Privacy and security → Cookies and other site data → See all cookies and site data
- Firefox: Settings → Privacy & Security → Cookies and Site Data → Manage Data
- Safari: Settings → Privacy → Manage Website Data
- Edge: Settings → Privacy, search, and services → Clear browsing data
Please note: deleting cookies will reset your saved language preference and cookie consent. The cookie banner will be shown again on your next visit.
Further information
For detailed information on data processing on this website, see our Privacy Policy.
For questions please contact: hi@sieberedu.com
Last updated: 11 May 2026
The German version is the legally binding version.