http://www.us-cert.gov/cas/tips/index.html US-CERT Cyber Security Tips describe and offer advice about common security issues for non-technical computer users. Tips are restricted to a single topic, although complex issues may span multiple tips. Each tip builds upon the knowledge, both terminology and content, of those published prior to it. en-us Produced 2010 by US-CERT, a government organization. 2010-01-28T21:42:50+00:00 info@us-cert.gov http://www.us-cert.gov/cas/tips/ST04-020.html Protecting Portable Devices: Data Security http://www.us-cert.gov/cas/tips/ST04-019.html Understanding Encryption http://www.us-cert.gov/cas/tips/ST04-018.html Understanding Digital Signatures http://www.us-cert.gov/cas/tips/ST04-017.html Protecting Portable Devices: Physical Security http://www.us-cert.gov/cas/tips/ST04-016.html Recognizing and Avoiding Spyware http://www.us-cert.gov/cas/tips/ST04-015.html Understanding Denial-of-Service Attacks http://www.us-cert.gov/cas/tips/ST04-014.html Avoiding Social Engineering and Phishing Attacks http://www.us-cert.gov/cas/tips/ST04-013.html Protecting Your Privacy http://www.us-cert.gov/cas/tips/ST04-011.html Using Instant Messaging and Chat Rooms Safely http://www.us-cert.gov/cas/tips/ST04-010.html Using Caution with Email Attachments