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How can I securely store sensitive information in browser storage?
Asked on Jan 15, 2026
Answer
To securely store sensitive information in browser storage, you should use encryption to protect the data before storing it, and ensure that you use secure storage mechanisms like `sessionStorage` or `localStorage` with caution.
<!-- BEGIN COPY / PASTE -->
// Example of encrypting data before storing in localStorage
const sensitiveData = "userSecret";
const encryptedData = btoa(sensitiveData); // Simple Base64 encoding
localStorage.setItem('secureData', encryptedData);
// To retrieve and decrypt
const retrievedData = localStorage.getItem('secureData');
const decryptedData = atob(retrievedData);
console.log(decryptedData); // Outputs: userSecret
<!-- END COPY / PASTE -->Additional Comment:
- Always encrypt sensitive data before storing it in browser storage to prevent unauthorized access.
- Consider using more robust encryption algorithms (e.g., AES) instead of simple encoding methods like Base64.
- Avoid storing highly sensitive information in browser storage if possible, as it can be accessed by any script running on the page.
✅ Answered with Security best practices.
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