How Safe Is Instant Messaging?

[juju]

Instant messengers are very popular programs, but they can become a security risk if you’re not careful. To protect yourself when you use IM programs, make sure your software (browsers and email programs, as well as IM clients) is up-to-date. Monthly updating is the minimum requirement for safety, and if you hear of a new worm or virus, check for updates immediately. Always use antivirus protection and, if possible, a software or hardware firewall. (This is especially important for broadband users.) To be safe, disable file sharing completely. If you don’t want to lose file-sharing capabilities, never open attachments (even if they appear to be from a friend or your IM host) unless you confirm their validity via email or telephone. Because some malicious software has no apparent ill effect on a PC, be wary of programs written by unknown authors, even if a friend or associate recommends them. That person’s PC may already be part of a remote attack, and he does not yet realize it. Check the settings of your IM client to ensure it is not set to accept incoming messages or download files automatically, even if the sender is on your accepted list. Always terminate your IM session when you leave the computer. Additionally, because instant messages are sent in plain text across an insecure network, it is not difficult for hackers to intercept them. Don’t ever reveal sensitive information, such as credit card numbers, business data, or vacation plans in an instant message. Finally, avoid using the Web-based IM clients that most IM services offer. These are handy because you can log on anywhere from any browser, but they also offer fewer security protections.

Tip from Smart Computing