What Are Cookies?
Also known as browser cookies or tracking cookies, cookies are small,
usually encrypted text files, located in your browser’s directory.
They are used by publishers on the Internet to help users navigate
websites and perform certain functions. Thanks to their core role of
enhancing usability or site functions, completely disabling cookies may
prevent users from using certain websites. This is how some sites know
when you return and keep you logged in, or will display a particular
page that you like. Often a cookie may be used to show some content only
once – say a popup or popunder or some other advertisement that shows
only the first time you visit a site and not every single time you
change pages or revisit.
Cookies are created when your browser loads a particular website.
The website sends information to the browser which then creates a text
file. Every time the user goes back to the same website, the browser
retrieves and sends this file to the web server. Cookies are created
not only by the website that the user is browsing at any particular
moment, but also by other websites that run ads, widgets, or other page
elements. These cookies govern how the ads appear or how the widgets
and other elements function on the page.
Standard uses for browser cookies
Websites set cookies to help authenticate a user if the user logs
into a secure area of a website. Login information or credentials are
stored in a cookie so that the user may enter and exit the website
without having to re-type the same login information over and over
again.
Session Cookies
Session Cookies are used by the web server to store information about
user page activities so users can easily pick up where they left off on
the server’s pages. Without using such cookies, a webpage can not
‘remember’ where you were on your last visit – this can only be done
with the use of session cookies. Session Cookies tell the server what
pages to show the user so the user doesn’t have to remember where he/she
left off or start navigating the site all over again. Session Cookies
function almost like a “bookmark” when used on such a site. Similarly,
cookies can store ordering information needed to make shopping carts
work instead of forcing the user to remember all the items the user put
in the shopping cart. This is very useful if your system experiences a
disruption in connectivity or your computer ‘crashes’ while you are in
thr process of filling a shopping cart.
Persistent or tracking Cookies
Persistent Cookies store user preferences. Many websites allow users
to customize exactly how information is presented through site layouts
or themes. These customizations make the site easier to navigate and/or
lets user leave a part of the user’s “personality” at the site.
Cookie security and privacy issues
Cookies are NOT viruses. Cookies use a plain text format. They are
not compiled pieces of code so they cannot be executed nor are they
self-executing. Accordingly, they cannot make copies of themselves and
spread to other networks to execute and replicate again. Since they
cannot perform these functions, they fall outside the standard virus
definition.
Cookies CAN be used for malicious purposes though. Since they store
information about a user’s browsing preferences and history, both on a
specific site and browsing among several sites, cookies can be used to
act as a form of spyware.
The way responsible and ethical web developers deal with privacy
issues caused by cookie tracking is by including clear descriptions of
how cookies are deployed on their site. Privacy Policy Online strives to
help web developers generate clear and easy-to-understand information
for web publishers to include on their web pages.