Browser Data Security: Web Crypto API vs. LocalStorage Risks

Why sensitive keys do not belong in LocalStorage and how to use subtle crypto for client-side encryption.

Published by EvriTool Editorial Team • Reading Time: 7 min read • Public Reference Guide (No Login Required)

The Vulnerability of LocalStorage

Any third-party script or XSS flaw can read LocalStorage keys with a single JavaScript call.

Deriving AES-GCM encryption keys using PBKDF2 to store sensitive client data safely.

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