Explanation
To prevent the log in the store from being modified, you can add a log checksum by using the config system global command. When the log is split, archived, and the log is uploaded (if the feature is enabled), you can configure the FortiAnalyzer to log the log file hash value, timestamp, and authentication code. This can help defend against man-in-the-middle attacks when uploading log transmission data from the FortiAnalyzer to the SFTP server.