An interesting article by Zack Whittaker should be required reading for all computer users. He writes:
Often, open-source software is the most secure
The latest Edward Snowden leaks have shown that the oldest, least funded open-source technologies are still able to hold out against intrusions and exploits by the U.S. National Security Agency (NSA).
Open-source offers one major benefit over their closed-source counterparts: The code is public and available for inspection, and therefore can’t as easily include secret backdoors for surveillance.
Here are some of those (as of yet) still secure apps, services, and technologies that can keep you safe online.
Whittaker’s article is available at http://www.zdnet.com/pictures/the-best-privacy-tools-for-staying-safe-secure-online.