There is so much folklore surrounding internet security matters that it is often hard to separate fact from fantasy. This article explodes the myths and explores the realities, giving you the tools and techniques to defend your privacy. Many people worry about this. If you use a service like an online bank or shop, you may find that the site recognises you when you return. This is not done by magic - the site has simply read the cookie it stored on your machine when you first registered.
Cookies can be very beneficial.
Privacy-conscious web users should also be aware that whilst cookies cannot damage your machine, they can enable websites to build consumer profiles of users that they can pass on to other companies. A better option might be to locate the cookies folder on your hard drive and manually delete the ones that don't relate to vital services like free mail, online banking or shopping. The BBC is not responsible for the content of external internet sites.