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In the last few years, candidates' online sites and e-mails have become a significant tool for their dash for campaign cash. Markus Jakobbson, the associate director of Indiana University's Center for Cybersecurity Research, says the potential for phishers to use e-mails that look like they come from candidates, is immense.

Theoretically, anyone can set up a Web site to look like an official site for a candidate or cause, all just to mine your bank or credit card account information. He's set up securitycartoon.com to spread the word.

His white paper, "The Threat of Political Phishing," was co-written with Christopher Soghoian.