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In recent days, the usage of cloud computing in wireless networks offers more advantages to the users by storing resources with less complexity. Data security is considered a critical aspect in a cloud computing environment due to the sensitive and confidential information of users stored in IoT. So, this paper introduces a lightweight and privacy-preserving two-factor authentication (TFA) with s-box based flipping module (SBFM) to provide data security for a user. The proposed scheme uses unclonable function key (UFK) to provide a better solution for highly-secured cloud computing. Moreover, reconfigurable unpredictable response value (RURV) helps to generate the different response values for every clock cycle in IoT. Finally, Spartan 6 Field Programmable Gate Array (FPGA) performances of the proposed TFA-RURV-IoT are compared to existing TFA-URV-IoT protocols, whereas the simulation results show that proposed TFA-RURV-IoT achieves better results in terms of LUT, slices, and flip flops.

Lightweight Two-Factor Authentication With S-Box Flipping Module for IoT Security