What methods can I use to protect certain important and private data like my ssh keys from other applications I might install?
Is there anyway to block access to these files and restrict the access of other applications? I am concerned about the case where the application may copy some of my data and send it back to the software author.
What protection methods and steps can I take to isolate an application or restrict its access - or is is necessary to have some type of full audit for any software I want to use since you can't just "trust" software from the Internet, even if it comes from a trusted website.
How to be sure such things not happen? If that tool does not require internet connection, then maybe block all ports for that tool with firewall? Probably configure firewall to block all ports by default.
But if that tool needs internet connection, not sure about the example now.
Or am I too paranoid and I should assume that tools are safe, unless there are some news about the tool that it was stealing data? So just do quick google search about it?