A Lightweight and Efficient Secure Hybrid RSA (SHRSA) Messaging Scheme With Four-Layered Authentication Stack

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For virtual private network and LAN-to-LAN tunnel sessions, End-to-End security is the main constraint in private messaging scenarios. Internet Protocol Security can negotiate new keys for every communication, but when the key is compromised, it is a problem. Perfect Forward Secrecy is the resolution. In addition, the messaging scheme should be efficient and lightweight for keeping parity with daily needs. The popular Rivest-Shamir-Adleman (RSA) cipher is omnipresent in secure communications but has many scientific problems. So here, in this paper, a lightweight and efficient Secure Hybrid RSA (SHRSA) messaging scheme with four-layered authentication stack is implemented and analyzed. The scheme is resolving the problem of asymptotic very low speed of decryption of RSA, the computational modular exponentiation complexity and partial key exposure vulnerability issues of RSA, and many more. The four-layered authentication stack have eliminated the need of the use of any password, external digital certificates, and a third party for authentication with its own four techniques in a staked way. We have found that in evolutions and analysis of the scheme, it is not only resolving various scientific problems of RSA but also occupying 2%–4% less CPU than main RSA and occupying 1%–3% less memory than main RSA. Its decryption average time has gained 8.858 times compared to the main RSA and gained 2.248 times compared to CRT RSA. We have found that the RSA, CRT-RSA, and SHRSA’s encryption throughput are alike-all are around 6 KB/Sec but decryption throughput of SHRSA has gained 8.5345 times than main RSA and gained 2.1174 times than CRT-RSA. The results obtained have shown us the relevancies of the SHRSA messaging scheme to be integratable as a cipher in Blockchain architectures, cyber-physical systems, and the Internet of Everything.