How can logs be protected when being rolled and archived in FortiAnalyzer?

The process of creating a log file hash serves as a protective measure for logs when they are rolled and archived in FortiAnalyzer. Hashing is a technique that generates a unique value (the hash) based on the contents of the log file. This unique value can be used to verify the integrity of the logs after they have been archived. If any changes or tampering occur, the hash value will not match, indicating that the log file has been altered. This method ensures that the data remains trustworthy and can be relied upon for compliance, investigation, or review purposes.

While other methods such as encryption and compression have their benefits, they do not serve the same purpose of integrity verification. Encryption protects the contents from unauthorized access, while compression reduces file size for storage efficiency. Deleting old logs, on the other hand, does not protect the archived logs in any way; it simply removes older data from the system. Therefore, creating a log file hash is the most effective option for protecting logs during the rolling and archiving process.