Applying Attribute-Based Encryption on Publish Subscribe Messaging Patterns for the Internet of Things

With the advent of the Internet of Things (IoT), communication between connected machines has become necessity. We simulate the communication of IoT by short-lived instant messaging for group communication. Group communication security requires such measures as group forward and backward secrecy and perfect forward secrecy. We satisfy these security measures by using a group controller and Attributebased Encryption (ABE) to encrypt data on update procedures. The communication overhead is outsourced to a mediating MQ Telemetry Transport broker. Thus, we decrease the costs for group joins and leaves to T(1). The number of attributes used in the system are reduced to O(log(N)), where N represents the maximum number of members. We provide an intuitive approach to fit the maximum number N = 2k members to our requirements and to increase the maximum size of members, if needed by N = 2k+1.