In this issue: "Reflections on Privacy 2.0": Some issues that appear to be questions of privacy turn out to be matters of security or health policy. "Brave New World of Wiretapping": As telephone conversations migrate to the Internet, the government wants to listen in. "RFID Tag-You're It": A privacy activist argues that radio-frequency identification tags pose new security risks to those who carry them, often unwittingly. "How to Keep Secrets Safe": A versatile range of software solutions can protect the privacy of your information and online activities to any desired degree. "The End of Privacy": Social-networking Web sites may be radically realigning what is considered public and private.
©2008 Scientific American