<p>Bits of you are all over the Internet. If you've signed into Google and searched, saved a file in your Dropbox folder, made a phone call using Skype, or just woken up in the morning and checked your email, you're leaving a trail of digital crumbs. People who have access to this information companies powering your emails and Web searches, advertisers who are strategically directing ads at you can build a picture of who you are, what you like, and what you will probably do next. Revelations about government counter-terrorism programs such as PRISM indicate that federal agents and other operatives may use this data, too.</p><p>"Google knows what kinds of porn everyone in the world likes," Bruce Schneier, a security and cryptography expert told NBC News. Not only are companies tracking what you are doing, they are correlating it, he said.</p><p>Since news of PRISM broke, the leaders of the tech companies have denied knowledge of government access to their information. At Facebook, one of the world's biggest data collectors, Mark Zuckerberg posted a message that read: "When governments ask Facebook for data, we review each request carefully to make sure they always follow the correct processes and all applicable laws, and then only provide the information if is required by law."</p><p>But the law already permits quite a bit of digital sniffing much of it without a warrant.</p><p><a href="http://www.nbcnews.com/technology/facebook-forensics-what-feds-can-learn-your-digital-crumbs-6C10240840">Keep reading...</a></p><p>Read also:</p><p><a href="http://www.usatoday.com/story/tech/2013/06/07/facebook-google-weigh-in-on-nsa-prism-data-snooping/2402631/">Facebook, Google CEOs weigh in on NSA controversy</a> (USA TODAY)</p><p><a href="http://www.csmonitor.com/USA/DC-Decoder/2013/0608/PRISM-What-s-behind-this-NSA-surveillance-tool-lurking-about-your-Facebook-page">PRISM: What&#039;s behind this NSA surveillance tool lurking about your Facebook ...</a> (Christian Science Monitor)</p><p><a href="http://www.theatlanticwire.com/technology/2013/06/how-google-and-facebook-cooperated-nsa-and-prism/66030/">How Google and Facebook Cooperated with the NSA and PRISM</a> (The Atlantic Wire)</p><p>Explore: <a href="http://news.google.com/news/more?ncl=dEo05jbwPELeHOMzfDMd00ANQF5BM&ned=us">922 additional articles.</a></p>