Abstract: A real-estate system dynamically learns user profiles associated with users based at least in part on dynamic interaction of the users in a virtual environment that presents three-dimensional (3D) representations of available real-estate properties. Notably, the real-estate system may perform searches of available real-estate properties based at least in part on a search query associated with a user or an individual that is associated with or related to the user, and a user profile that includes information specifying real-estate interests of the user. Then, the real-estate system may provide or present search results in the virtual environment, where the virtual environment includes an avatar corresponding to the user or the individual and a 3D representation of a real-estate property. The virtual environment allows the user or the individual to dynamically explore and view the real-estate property, as well as to provide feedback about real-estate elements in the real-estate property.

Abstract: A method for deterring forgeries and authenticating signatures placed on any document or other object (collectively “Item”) is disclosed. A first two dimensional bar code or forgery-proof diffraction grating pattern or similar information bearing medium (Electronic Fingerprint or “EF”) is issued to a person whose signature is being protected (“Principal”) by a central registrar (“CR”). A personal identification number (“PIN”) which has been assigned by the CR to the Principal is encoded on the EF. The PIN remains constant and is encoded on all EFs distributed to the Principal.