Is file permission secured when it transferred from Ubuntu to Windows?

Posted by Gaurav_Java on Ask Ubuntu See other posts from Ask Ubuntu or by Gaurav_Java
Published on 2012-08-30T14:57:19Z Indexed on 2012/08/30 15:49 UTC
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Filed under:

software-recommendation

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permissions

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filesystem

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security

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encryption

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.

I gone through this question it says there is nothing.
And from this question I am not able to understand how can I protect it.

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.

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