Secure and Efficiently Searchable IoT Communication Data Management\n Model: Using Blockchain as a new tool

Abstract

With the rapid development of the Internet of things (IoT), more and more IoT\ndevices are connected and communicate frequently. In this background, the\ntraditional centralized security architecture of IoT will be limited in terms\nof data storage space, data reliability, scalability, operating costs and\nliability judgment. In this paper, we propose an new key information storage\nframework based on a small distributed database generated by blockchain\ntechnology and cloud storage. Specifically, all encrypted key communication\ndata will be upload to public could server for enough storage, but the\nabstracts of these data (called "communication logs") will be recorded in "IoT\nledger" (i.e., an distributed database) that maintained by all IoT devices\naccording to the blockchain generation approach, which could solve the problem\nof data reliability, scalability and liability judgment. Besides, in order to\nefficiently search communication logs and not reveal any sensitive information\nof communication data, we design the secure search scheme for our "IoT ledger",\nwhich exploits the Asymmetric Scalar-product Preserving Encryption (ASPE)\napproach to guarantee the data security, and exploits the 2-layers index which\nis tailor-made for blockchain database to improve the search efficiency.\nSecurity analysis and experiments on synthetic dataset show that our schemes\nare secure and efficient.\n