HOOSC: heterogeneous online/offline signcryption for the Internet of Things

In order to improve the accessibility of the services provided by a sensor network, wireless sensor networks (WSNs) is integrated to Internet of Things (IoTs). In this case, the security is one of the issues be considered when integrating wireless sensor network to IoTs. In this paper, a heterogeneous secure scheme is proposed to build a secure channel between WSNs and Internet server in the IoTs. To achieve better security with minimum cost in WSNs, certificateless and online/offline technique are used. In addition, to increase the scalability at the Internet server side, public key infrastructure is used. As compared with four existing heterogeneous schemes, the proposed scheme has less energy consumption and computational cost. In addition, two application scenarios that illustrate how the proposed scheme can be applied in the IoTs have been given.