MARKUS JAKOBSSON, PhD, is Principal Scientist forConsumer Security at PayPal. He is the founder of the securitystartups RavenWhite and FatSkunk and has held positions at PaloAlto Research Center, RSA Laboratories, and Bell Labs. The editorof RSA's technical newsletter CryptoBytes, Dr. Jakobssonholds numerous U.S. patents, has published more than 100 articles,and authored and edited several books, including Phishing andCountermeasures: Understanding the Increasing Problem of ElectronicIdentity Theft (Wiley). He has been interviewed on the subjectsof phishing and crimeware on NPR, BBC, and other high-profile mediaoutlets.