SIT: A Lightweight Encryption Algorithm for Secure Internet of Things

Abstract

Abstract-The Internet of Things (IoT) being a promising technology of the future is expected to connect billions of devices. The increased number of communication is expected to generate mountains of data and the security of data can be a threat. The devices in the architecture are essentially smaller in size and low powered. Conventional encryption algorithms are generally computationally expensive due to their complexity and requires many rounds to encrypt, essentially wasting the constrained energy of the gadgets. Less complex algorithm, however, may compromise the desired integrity. In this paper we propose a lightweight encryption algorithm named as Secure IoT (SIT). It is a 64-bit block cipher and requires 64-bit key to encrypt the data. The architecture of the algorithm is a mixture of feistel and a uniform substitution-permutation network. Simulations result shows the algorithm provides substantial security in just five encryption rounds. The hardware implementation of the algorithm is done on a low cost 8-bit micro-controller and the results of code size, memory utilization and encryption/decryption execution cycles are compared with benchmark encryption algorithms. The MATLAB code for relevant simulations is available online at https://goo.gl/Uw7E0W.

A lightweight Encryption Algorithm applied to a quantized speech image for Secure IoT

“…-Execution Time: One of the fundamental parameter for the algorithm evaluation is the time amount that it takes for encoding and decoding a particular data. The algorithm proposed in [5] is designed for the IoT environment sould consume minimal time and provide substantial security [5].…”

“…These expectations are computed by using the following formula: (5) With is the total number of pixels in the image and is equal to , is a vector having as length and represents the intensity values of the original image.…”

“…The IoT is taking the mobile network, conventional internet and sensor network to another level as everything will be connected to the internet. A matter of concern that should be kept under consideration is to guarantee the issues related to data integrity, confidentiality and authenticity that will emerge on security account and privacy [4,5].…”

“…As shown in Figure 2, a lightweight encryption algorithm proposed in [5], is applied to the quantized speech image in order to obtain the encrypted image. After that, the lightweight decryption algorithm [5] is applied to the encrypted image in order to have the decrypted image.…”

“…After that, the lightweight decryption algorithm [5] is applied to the encrypted image in order to have the decrypted image. Then, the reconstruction of the quantized speech signal is performed and finally the dequantization is applied to this signal in order to obtain the output speech signal which represents the confidential data.…”