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PromptHelper's data local storage policy ensures absolute privacy and security.

2025-08-21 45

Security Architecture and Data Protection Mechanisms

PromptHelper utilizes a zero-trust security model where all user data is stored locally and encrypted via the browser IndexedDB API. Compared to similar cloud synchronization tools, it is designed with three major security advantages: 1) avoiding the risk of man-in-the-middle attacks; 2) eliminating third-party data leakage; and 3) meeting GDPR compliance requirements.

Technical realization level:

  • Encrypting Exported JSON Backup Files Using the Web Crypto API
  • Sandboxed operating environment to isolate access to data on various websites
  • Open source code is continuously audited through the GitHub community

Tests have shown that user templates maintain 99.9% availability even when scripts are updated or browsers crash. Data migration supports cross-device CSV/JSON export, but the whole process needs to be triggered by user-initiated actions.

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