A system and method that provides groups of users a capability for collaborative 3D visualization and real time interaction on computer networks. Users establish a trust relationship a-priori with other users of their choice and setup sessions for collaborative visualization of “3D Models”. Various 3D capable computing devices such a desktop and laptop computers, smartphones and tablets are supported. Changes made by a specific user on his “3D Model” get replicated on peer users' computer environment thereby simulating an experience of being physically co-located for the purpose of visualization and interaction. Changes to the “3D Model” for appearance, geometric transformations, lighting, and addition/deletion of sub-objects are supported for collaborative usage. Indexing and querying of “3D Models” are supported collaboratively. The power of digital certificates id leveraged to provide digital signing capability on changes made to “3D Models” or related metadata.