"IM presents as many potential security risks as email and must be properly managed." We asked Tim first to explain the risks. Referring to the way kids like to share files, photos, videos, and tunes via IM, he said the difference between attaching files to IMs versus emails is like "placing a letter in your mailbox for the postman to retrieve and deliver" (email) versus "leaving the doors and windows to your home wide open while you wait for the intended recipient (and anyone else) to come in and pick up the letter you've left for them on your desk (and browse around your home)" with IM.
When you allow file-sharing in an IM program (such as AOL's AIM or Yahoo or MSN Instant Messenger), you're not only opening "a wide door on your machine," you're also "broadcasting your presence" on the Internet, Tim said. Even when you close the IM window without quitting the program, "the application [at its default setting] is running in the background, broadcasting your presence" for personal info collectors, malicious hackers, etc. (stay tuned - more on the default-setting issue below). Your PC is just as vulnerable to viruses and spam with IM as with email, if not more. "The [IM] conversation is traveling across the Net in clear open text," Tim said. "People can use a variety of methods to just pull the text down, hijack personal information."