Granular delete files from backups

[haertig]

See my similar question in the thread below. Our reasons for wanting to delete a file are different, but our ultimate goal (removal of the file) is the same.

Can you selectively remove a file from backups?

Is there a way to selectively remove a file from file-based backups? Scenario: You find a file on a client in plain text that really should be encrypted. This file has been backed up for a while via urbackup file-based backups in plain text. Can you remove all traces of this single file from all existing file-based backups, leaving everything else that was backed up intact? (I realize that if this plain text file was backed up as part of an image backup, you are screwed)

Specifically, the suggestion by user “tin” in the above thread.