Nearly 700 Web sites are members of Truste and more are joining all the time, Lewin said.

CNN: Is the e-commerce boom fueling security holes?

Look for the green TRUSTe seal on a site to check if it has a good privacy policy.

CNN: ASIANOW - Asiaweek | Technology | Pulse

If they don't they'll not only lose customers but growth of e-commerce in general will be impeded, Lewin of TRUSTe said.

CNN: Is the e-commerce boom fueling security holes?

Companies like PrivacyChoice and TRUSTe already provide developers with privacy tools.

FORBES: The Growing Problem Of Privacy-Invading Mobile Apps

"With the growth of the Internet and the use of e-commerce, you're going to get more and more of these situations, " said Bob Lewin, executive director of TRUSTe, a Cupertino, Calif.

CNN: Is the e-commerce boom fueling security holes?