In this paper, we propose an elliptic curve cryptography (ECC)-based certificateless multi-receiver encryption scheme for device to device communications on Internet of Things (IoT) applications. The proposed scheme eliminates computation expensive pairing operations to provide a lightweight multi-receiver encryption scheme, which has favourable properties for IoT applications. In addition to less time usage for both sender and receiver, the proposed scheme offers the necessary security properties such as source authentication, implicit user authentication, message integrity, and replay attack prevention for secure data exchange. In this paper, we show security proof for the proposed scheme based on the Elliptic Curve Discrete Logarithm Problem (ECDLP). We implemented our proposed scheme on a real embedded Android device and confirmed that it achieves less time cost for both encryption and decryption compared with the existing most efficient certificate-based multi-receiver encryption scheme and certificateless multi-receiver encryption scheme.
Abstract:In this paper, we propose a lost data recovery scheme called the synchronized recovery stream merging (SRSM) for sensor data stream multicasting in the unstable networks of the IoT applications. We propose two types of SRSM. The first one is "Latency-aware synchronized recovery stream merging (SRSM-L)" for IoT applications that has restrictions of acceptable latency. The other is "Bandwidth-dependent synchronized recovery stream merging (SRSM-B)" for the cases in which the network bandwidth for the sender is limited. Our proposed schemes reduce the number of the streams managed by the sender by waiting for other recovery streams to synchronize the delivery timing and merging. From our simulation evaluations, we confirmed that our proposed schemes save network bandwidth on the sender in the random and burst failure situations. We confirmed that SRSM-L could reduce the network bandwidth of the sender about 52% in the random failure situation, keeping the acceptable latency. We also confirmed that SRSM-B could keep the specified number of streams constant and the latency overheads small in the burst failure situation.
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