AWS_Cloudtrail_2
CloudTrail log file validation creates a digitally signed digest file containing a hash of each log that CloudTrail writes to S3. These digest files can be used to determine whether a log file was changed, deleted, or unchanged after CloudTrail delivered the log. It is recommended that file validation be enabled on all CloudTrails.
Perform the following to enable log file validation on a given trail:
Via the management Console
Via CLI
aws cloudtrail update-trail –name <