Claude secure usage: how to work with AI without sharing sensitive information
Summary
An overview of Claude's data privacy, retention controls, and secure usage practices as of September 2025, including tips for avoiding the sharing of sensitive information.
Key quotes
Claude does not use user prompts or responses for model training unless the user explicitly opts in.
For individual users, Claude retains chat history indefinitely until manually deleted.
Once a conversation is removed, back-end logs are purged within 30 days
The article outlines the privacy framework for Claude AI, detailing default non-training policies and retention timelines for individual and enterprise users. It provides a set of best practices for secure prompting to minimize data exposure.