Delete Cookies: New-Age Diet or Common Sense Internet Security?

No, this article isn't about some new, lose-20-pounds-in-a-week, certified-by-some-tan-Southern-California-doctor diet. It's about cookies on your computer - what they are, why they are there, and what to do about them. Computer cookies actually have quite a bit in common with their baked counterparts - some are good, some are bad, and they have expiration dates.

Cookies are small text files that a server places onto your hard drive whenever you access a given domain. Cookies typically contain information that the website uses to either customize the page you are viewing or otherwise make your web browsing experience more convenient and enjoyable. The information is stored on your hard drive and accessed whenever you go back to the website that originally gave you the cookie. They usually include an expiration date at which point they will be erased from your computer - it could be when you close your browser; or hours, days, months, or years after it is placed. Some don't expire at all. At the time of this writing I had a cookie stored on my computer that wasn't set to expire until Wednesday, February 25th, 2195 at 3:45:13 am - I deleted it.

Before you run out to your browser's options and delete and block all cookies, let me mention a few common uses of cookies:

* Cookies store information for 'shopping carts' at online stores. When you select an item and place it in the shopping cart, a cookie is created to remember the item and the price so that you can keep shopping. When you are done shopping you simply click the button to check out and the site accesses the information stored in the cookies to complete your order.

* Cookies can be used to remember logins and passwords. While this initially sounds a little disheartening, the purpose is really to save you time. Sites will remember the information for you so you don't have to type it in each time you want to access information.

* Cookies help websites customize their content and layout for you. If you are a diehard fan of the local college's basketball team, and you always access the stats and score from the game at a website, that site might use a cookie to send you straight to your team's page.

* Cookies help identify whether you have already visited a site. They can also count how many times you have visited the site in a given period of time.

* Cookies remember the last page or position you were on at the site. Like a virtual bookmark, this is especially helpful if you are reading online or accessing several pages of information.

There are many other ways cookies can be used, and there is obvious potential for abuse. You probably wouldn't eat a cookie given to you by a complete stranger, especially if you didn't know what was in it. The same common-sense principle holds true while you're online, and exercising a little caution can save you from a lot of heartache later on. Blocking any and all cookies will guarantee no personal information is leaked through the cookies, but many sites will either not be able to or will choose not to interact with you.

The trick, then, is to let the good cookies through while screening out the bad ones, not at all dissimilar to what you do when you hover over the cookie tray at a party - you take the ones you want and leave the rest behind. This can be accomplished in a few different ways.

First, you can periodically delete all the cookies on your hard drive. This will systematically wipe out all unwanted cookies that have made their way to your computer. Unfortunately, it will also take care of all the good cookies too. If you only use the internet occasionally (i.e. a few minutes a week), this option might work for you.

Second, you can try to go about it manually. Many browsers that allow you to block cookies also include a feature that allows you to include a list of sites from which you will allow cookies. The advantage of this method is it places virtually complete control over cookies into your hands, allowing only those that you want to be placed on your hard drive. The disadvantage is that it can become very burdensome (at times downright annoying) having to constantly update the list of allowed sites.

Third, you can call in some third-party software to help out. The best programs will scan your computer to find all the cookies and put them into a table or list. This saves you the trouble of having to dig around your hard drive to find the files yourself (try looking for a folder named "Cookies"). Many programs will also indicate with some degree of confidence whether a given cookie is wanted or unwanted, and provide a convenient way to delete the ones that you decide you don't want.

Temporary Internet Files - the Good, the Bad, and the Ugly

A little bit of time invested into learning about internet security can go a long way in preventing mishaps on your computer. Temporary internet files are not something we should be afraid of, but we should certainly be careful in how much we trust them and how we deal with them.

Temporary internet files are image, text, and formatting files that are stored on your hard drive by the websites that you visit. They are placed there by the websites without your having to do anything. The files are stored on your computer the first time you visit the site so that the next time you go to that webpage you only have to load new information or files that have changed since the last time you visited - files that have not changed are loaded from the temporary internet files folder at a much faster speed than over the internet.

This seems like an incredibly appealing option, especially to those of us still working at home on dial-up connections (my teenage brother-in-law insists I'm "old school" because I don't have DSL - I think he may be right). Storing the temporary internet files on the hard drive significantly cuts down the amount of time it takes to completely load and view a website.

There are a few question areas, however, that need to be considered in any discussion about temporary internet files. First, and arguably the most trivial of the concerns, is that you may miss out on all of the updated information the website has to offer. If your browser loads the files from your temporary internet files folder rather than the updated material from the website, you may miss out on an updated football score, or you may get a different image than the one others are viewing. The system is designed so that things like that don't happen, but the possibility is out there.

Second, storing huge numbers of files can bog down your computer, slowing down its ability to do even the simplest of tasks, such as word processing (a deadly one-two combination if you're working with dial-up!). Fortunately, you can control the number or size of the files that are being stored on your hard drive. Typically under the Tools>Options menu of your browser you'll be able to set the amount of your hard drive you're willing to dedicate to temporary internet files. You may want to set this high or low, depending on your browsing habits and need for speed.

Third, the temporary internet files folder may contain files that contain viruses, inappropriate images or text, and files that could leak personal information to websites. This is obviously a huge concern any time you allow someone virtually unregulated access to your hard drive. Images from an inappropriate website you accidentally stumbled across (it has happened to all of us) may be stored on your hard drive. Corrupted files may be placed there by an unfamiliar website you only visited once. Cookies and other files may potentially spawn popups that cover your screen in a matter of seconds.

Before you grab your pitch fork and storm the beast's castle, let me mention a few things you can do to bring a little control to your temporary internet files folder without destroying it completely.

I already mentioned limiting the amount of your hard drive dedicated to holding files from visited websites. This is the best option for those who may be less concerned about corrupted or inappropriate files being stored and more concerned about the ability of their Jurassic-era computer to perform at a decent speed. Some versions of the popular browsers won't allow you to completely eliminate storing files, but you can limit the resources to 1% of your hard drive or a small number of megabytes.

Some opt to regularly clean out their temporary internet files folder - obviously this will eliminate malignant files and free up some space for your computer; but it will also eliminate files you may want. A quick note about the files that begin with "Cookie:" - cleaning out the folder will not actually delete the cookies. The cookie files in the temporary internet files folder are simple files that point the browser to the actual cookie in the "Cookies" folder on your hard drive. If you are interested in truly purging your system of internet files, you'll need to clean out that folder as well.

In my view, the most judicious option is to utilize available software to manage the content of your temporary internet files. Some files you want because they make your life easier. Some files you don't want because it bogs down your computer and makes your grandmother blush. Software is available that scans your computer and finds all the internet files (including cookies). The software makes recommendations as to whether the file in question is good, bad, or ugly - all you have to do is decide to keep or trash it, then click the appropriate button.

Temporary internet files can make our internet browsing time a quick and convenient experience. Unfortunately, they may also pose a risk to the security of our hard drives. With a little hands-on management we can keep ourselves, our loved ones, and our computers happy, safe, and protected.