# The Schleuse at a glance: fact sheet | IT-INTERDEV

> The key facts about the Schleuse (cryptic shadow) in one overview: purpose, how it works, status, limits, contact.

Language: en · Source: https://it-interdev.de/en/facts.html · Alternate (de): https://it-interdev.de/fakten.html · Updated: 2026-10-05

- **Name:** Schleuse (brand name: cryptic shadow). “Schleuse” is German for “lock” as in a canal lock.
- **Provider:** IT-INTERDEV (in formation), Holger Roswandowicz, Bünde, Germany
- **Contact:** info@it-interdev.de
- **Purpose:** Use cloud AI services without names, identifiers and credentials leaving your own equipment in plain text.
- **How it works:** Detect locally, replace with stand-in words that keep the meaning, check, send to the cloud AI, translate the answer back on your side.
- **Detection:** Fixed patterns with check digits, a name detector (Presidio, GLiNER) and a local language model as a second reader. Everything runs locally.
- **Key:** Stays with the customer. In the relay server only in working memory and with an expiry time.
- **Zones:** Green, yellow, red, blue. Rules may only get stricter. Red and blue never go to the cloud.
- **File formats:** Text, PDF, Word, Excel, PowerPoint, OpenDocument, images and scans. No audio, no video.
- **Languages:** So far measured with German only.
- **Version and status:** 0.1 Alpha. So far tested only with made-up examples.
- **Review:** No review by third parties. No legal review.
- **Legal classification:** Pseudonymisation, not anonymisation. The evidence is technical and not a legal certificate. No legal advice.
- **Limits:** No detection reaches one hundred percent. A small remainder is possible. When in doubt, nothing is sent.
- **Price:** None yet. Pilot partners wanted.
- **Use cases:** 30 described use cases in 7 fields: office, energy and farming, law and tax, medical care, municipalities, construction, software development.
- **Languages of this website:** German and English.