If an account is compromised, a dissimilar identicon will be formed as the attacker is posting from an unfamiliar IP address.
GIF avatars were introduced as early as 1990 in the Imagi Nation Network (also known as Sierra On-Line) game and chat hybrid.
In this way, a particular anonymous user can be uniquely identified from session to session without the need for registration or authentication.
The traditional avatar system used on most Internet forums is a small (80x80 to 100x100 pixels, for example) square-shaped area close to the user's forum post, where the avatar is placed in order for other users to easily identify who has written the post without having to read their username.
Some forums allow the user to upload an avatar image that may have been designed by the user or acquired from elsewhere.
In such animated avatars, the number of images as well as the time in which they are replayed vary considerably.
Other avatar systems exist, such as on Gaia Online, Wee World, Frenzoo or Meez, where a pixelized representation of a person or creature is used, which can then be customized to the user's wishes. Trutoon) where a representation is created using a person's face with customized characters and backgrounds.
You stand in a throng of multifleshed being, mind avatared in all its matter, on a broad avenue winding through a city of blue trees with bright red foliage and living buildings growing from the soil in a multitude of forms.
In Snow Crash, the term avatar was used to describe the virtual simulation of the human form in the Metaverse, a fictional virtual-reality application on the Internet.
In 1997, Cybertown first introduced three dimensional avatars to internet chat.
In 1996 Microsoft Comic Chat, an IRC client that used cartoon avatars for chatting, was released.
Another avatar-based system is one wherein an image is automatically generated based on the identity of the poster.