SYSTEM FOR GENERATING SITE-SPECIFIC USER ALIASES IN A COMPUTER NETWORK

An system for allowing a computer network site to recognize an anonymous user without revealing the identity of the user. The system involves generating a user alias based on the user's identity and the computer network site such that it is computationally difficult to determine the user's identity from the alias alone. The system further involves informing the computer network site of the alias upon access of the site by the user. The computer network site may then block access to the site's contents whenever it receives an alias associated with a disruptive user.