Secure Information Sharing System

Privacy emerged as a hot issue again, as the General Data Protection Regulation (GDPR) of EU has become
enforceable since May 25, 2018. This paper deals with the problem of health information sharing on a website
securely and with preserving privacy. In the context of patient networks (such as ‘PatientsLikeMe’ or ‘USA
Patient Network’), we propose the model Secure Information Sharing System (SISS) with the main method of
group key cryptosystem. SISS addresses important problems of group key systems. (1) The new developed
equations for encryption and decryption can eliminate the rekeying and redistribution process for every
membership-change of the group, keeping the security requirements. (2) The new 3D Stereoscopic Image
Mobile Security Technology with AR (augmented reality) solves the problem of conspiracy by group members.
(3) SISS uses the reversed one-way hash chain to guarantee forward secrecy and backward accessibility
(security requirements for information sharing in a group). We conduct a security analysis of SISS according to
group information sharing secrecy and an experiment on its performance. Consequently, although current IT
paradigm is changing to be more and more ‘complicated’, ‘overlapped’, and ‘virtualized’, SISS makes it
possible to securely share sensitive information from collaborative work.