Abstract-Interoperabilityenables peer systems to communicate with each other and use the functionality of peer systems effectively. It improves ability for different systems to exchange information between cooperative systems. It plays a vital role in educational information system institutions. Practically, there are two main technical reasons that restrain the interoperability of the system. First, these systems may be developed under various operating systems, programming languages and different database management systems. Second, the obsessions of security greatly impact the execution of interoperability among various educational institutions. This paper proposes a new RESTful secured interoperable model for data exchange among different information system. This will help educational information system to exchange data among them with a pre-defined standard format of messages. Additionally, this paper designed Cross Platform Web Application Interoperability Protocol (CPWAIP) to facilitate the interaction among components of the proposed model.