CLEVELAND -- A phone call to your mother and an e-mail to a friend should be private information, right?

But NewsChannel5's Adam Shapiro reported that privacy is changing since the Sept. 11, 2001, terrorist attacks.

Robert Blunk was having a good day until NewsChannel5 told him that his cell phone is also a tracking device.

The technology exists to pinpoint any cell phone that's turned on anywhere in the country.

"I don't need to be tracked," he said. "It's just wrong. People don't need to track people with cell phones."

It worries Peter Swire, a former privacy adviser to President Bill Clinton.

"The phone company, by law, has to get quite an accurate fix on where you are with your cell phone, and to the extent they keep those records, the government with a subpoena can go in and take a look at where you've been that day," he said.

Swire, as well as some of the biggest names in privacy, attended a major conference on the subject in Cleveland Thursday.

Swire said that laws protecting your privacy are being rolled back.

"And the question is where those laws are going to go down the road," he said.

Since the Patriot Act was passed last fall after the terror attacks, Swire said that it's easier for the government to get a subpoena to find out which books you check out from the library.

"I don't think it's fair for them to be checking on what kind of book you get -- that's up to you," said Venus Vanitzan, a library visitor.

The Cleveland Public Library said that nobody has asked for that kind of information yet. The privacy experts at Thursday's conference want to keep it that way.

Swire said that another way to protect your privacy is to improve security on your home computer by installing anti-virus software.