Cookies, also known as web cookies or tracking cookies are text files created and saved on the local machine of a user through the web browser when he accesses a particular website. Cookies are created for user authentication, maintenance of data Web browser and session tracking. While most browsers can be customized to stop cookies from being created on your machine, some websites would ideally not work without cookies. Such websites include auc- tion sites, e-mail service providers or online shopping portals. They are text files with a txt' extension and are not self executable by nature. Cookies are generally 4KB or less in size. Cookies may act as a spyware component, but they can not be worms or viruses.

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