Hi, we have programmatic methods that we use when monitoring, downloading, and upgrading new versions of LimeSurvey. One step that we would like to include in our process is the ability to authenticate the files to ensure no malicious activity has occurred at some point along the lifecycle of the files. Do we (LimeSurvey) have something in place to help verify the files before we install them? Example: GPG, File Hash Codes and Checksums.