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What's a good strategy to secure sensitive data stored in cookies?
Asked on Jan 14, 2026
Answer
To secure sensitive data stored in cookies, use a combination of encryption, the Secure flag, and the HttpOnly flag to protect the data from unauthorized access and transmission over insecure connections.
Example Concept: Encrypt sensitive data before storing it in cookies to ensure that even if the cookie is intercepted, the data remains unreadable. Use the Secure flag to ensure cookies are only sent over HTTPS, and the HttpOnly flag to prevent client-side scripts from accessing the cookie data.
Additional Comment:
- Always use strong encryption algorithms to protect the data within the cookie.
- Regularly rotate encryption keys to minimize the risk of key compromise.
- Consider using the
SameSiteattribute to mitigate CSRF attacks by controlling how cookies are sent with cross-site requests.
✅ Answered with Security best practices.
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