Observed arrival · 2026-11-14
Hesychos: a redaction layer for AI prompts
Hesychos presents a Windows app that replaces personal details with placeholders before sending prompts or documents to AI services, then restores them in the response.
- For
- Hungarian businesses handling client data in AI-assisted work
- Worth noticing
- It checks public checksum rules for Hungarian identifiers, and explicitly describes its masking as pseudonymization—not anonymization.
Field notes
The page lays out a four-step workflow, from asking a question or attaching a file to restoring details in the returned answer. It lists Hungarian identifiers such as TAJ numbers and company registration numbers, and says checksums help avoid treating arbitrary number strings as valid identifiers. The site also states that the masking is pseudonymization rather than anonymization, a limitation that matters when assessing what protection the product offers.
Observed signals
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Editorial observations of this landing page, not a rating.
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