Abstract
Many Internet of Things (IoT) network and security studies have suggested to design a secure transmission scheme based on cryptographic methodology to guarantee that a transmitted requested service is securely delivered to the end-user. However, most of the IoT security schemes presented in the literature focus only on protecting the transmission data between sender and receiver without considering any potential cost that may result from their schemes. Cryptographic mathematical operation always incur some cost in transforming plaintext to ciphertext that may result in increasing the latency of providing the IoT application in real-time to end-user. With sending thousands of queries messages, encryption, verifying and decrypting each received message separately will result in a time delay, especially when a large number of similar queries are received at the same time. Therefore, applying incompatible cryptographic schemes in an IoT network system may not be practical for protecting IoT applications. In this work, we design a lightweight privacy-preserving (LPP) scheme to protect the IoT transmission network system with a feature for reducing the latency issues resulting from cryptographic computation cost on each ciphertext. The results of a security analysis substantiate the ability of the proposed scheme to withstand a range of security attacks against the IoT transmission network. Additionally, these results show that the proposed scheme registers a high efficiency in reducing both ciphertext size and computational cost.
•An IoT network is a large network connecting devices, which may send thousands of messages.•Securing thousands of sending data without latency growing, it is the current study challenges.•Designing cryptographic scheme has been used in protecting IoT network transmission system.•Most of IoT security schemes ignore the latency issues that result from cryptography cost.•Verify and decrypt a large number of similar ciphertexts separately will result in time delay.