I have taken a great interest in personal privacy on the Internet. I have found some things to help accomplish that. Please comment if you know of additional resources or techniques. 1) Private email via PGP encryption: Seems to be most easily accomplished using the Thunderbird email client with the Enigmail PGP add-on. Note, you will need to have PGP or GPG also, installed. This is usually true by default on Linux systems, but on Windows you need to install GPG4Win. http://www.gpg4win.org/ To obtain the Thunderbird mail client program: https://www.mozilla.org/en-US/thunderbird/ To obtain the Enigmail add-on: http://enigmail.mozdev.org/home/index.php.html Another option is the Claws Mail client which incorporates PGP support http://www.claws-mail.org/ A good article introducing the use of the Thunderbird email client with the Enigmail add-on. http://howto.cnet.com/8301-11310_39-10434684-285/want-really-secure-gmail-try-gpg-encryption/ My public key for wa5pb19 <at> gmail <dot> com is: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x7A4F5D66B10B68A3 2) Private surfing using the TOR browser, which is a specialized cut of Firefox which incorporates the use of internet relays to help keep your own internet surfing presence anonymous. https://www.torproject.org/ 3) Private internet searching via the DuckDuckGo search engine. Which can also be added as a search provider for the Firefox search bar. https://www.duckduckgo.com 4) Encryption of files using GPG. http://www.linuxjournal.com/content/tech-tip-encrypt-files-gpg A good, brief intro to GPG. http://www.madboa.com/geek/gpg-quickstart/ The official GPG documentation. http://www.gnupg.org/documentation/ WHY? Some people might ask, "Why? Do you have something to hide?". To which I respond, "No. But, why not? Do we not have a right to privacy?". However, it must be remembered that if we desire a right to privacy, we much put effort into keeping our own information private. If we release information about ourselves, intentionally or not, it is no longer private and we arguably lose the reasonable expectation of privacy afforded by the 4th Amendment of the U.S. Constitution. The problem arises when we unwittingly reveal information about ourselves via the internet and other computing activities. These resources may help a person to avoid doing that. From: https://en.wikipedia.org/wiki/Fourth_Amendment_to_the_United_States_Constitution#Computers_and_privacy
On March 11, 2010, the United States Court of Appeals for the Eleventh Circuit ruled, in Rehberg v. Paulk, 598 F.3d 1268, that a person does not have a reasonable expectation of privacy in an e-mail once any copy of the communication is delivered to a third party.
On December 14, 2010, in United States v. Warshak, the United States Court of Appeals for the Sixth Circuit ruled that a person has a reasonable expectation of privacy in his emails and that the government violated Warshak’s Fourth Amendment rights by compelling his internet service provider to turn over his emails without first obtaining a warrant based upon probable cause.