NiftySentinel AV archive is a private tool operated by Aswin Varghese. It copies the owner's own market-data recordings (files produced by the owner's own trading-research software) to the owner's own Google Drive, and checks that every copy matches the original.
It uses the Google Drive API with the drive.file scope only. That scope lets the tool see and manage only the files and folders it creates itself; it cannot open any other file in the Drive.
The tool is not a public service. It has no sign-up, no other users and no customer data. Only the owner signs in to it.
Read the privacy policy.