I am having 9GB text file which is encrypted .
This file contains some confidential data . Which is on my system(Ubuntu) and my external HDD (
ntfs) . This file get daily updated and then encrypted . But it has to be shared among 2-3 (Windows) person. I defined permission so that no other person can even read this file(
chmod 660). It is too large file, so I can't upload it anywhere and it get updated daily basis.
But this file travel on Windows OS and Ubuntu also. Even I am having copy of this on my personal computer. Recently it was deleted by some other user over Windows . I just want to know how can I set permission over that file so that it cannot be deleted from any other operating system. If someone delete this file, then I am having data old for couple of days, which is only on my system.
Can I do anything for preventing this file from being deleted.
Then how can I secure this files from getting deleted any suggestion or software or ideas.
Maybe I sound silly or this is stupid question. Please don't close it, thanks for any suggestion or solution.