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Title:
A Multivariate Based Provably Secure Certificateless Signature Scheme with Applications to the Internet of Medical Things
Authors: Vikas Srivastava, Sumit Kumar Debnath
Abstract:Over the last few years, Internet of Medical Things (IoMT) has completely transformed the healthcare industry. It is bringing out the most notable, and unprecedented impacts on human health, and has totally changed the way we look at the healthcare industry. The healthcare sector all around the globe are leapfrogging, and adopting the technology, helping in transforming drastically in a very short span of time. However, as more and more number of medical devices are being connected to IoMT, security issues like ensuring authenticity and integrity of the transmitted data are also on the rise. In view of the context, there is a need of an efficient cryptographic primitive that can address these issues in a viable manner. A signature scheme seems to be the natural choice to mitigate the security concerns. But, traditional signature schemes, both PKI-based and Identity-based have their own disadvantages which makes them unsuitable for IoMT networks. Thus, to address the security issues and problems like certificate management and key escrow, herein, we put forward the {\em first} multivariate based certificateless signature scheme, namely {\sf Mul-CLS}, which is built on top of the intractability of multivariate-quadratic (MQ) problem. The fact that multivariate public key cryptosystem (MPKC) provides fast, post-quantum safe, and efficient primitives, makes it a front runner candidate among the other post-quantum cryptography candidates. Our scheme {\sf Mul-CLS} provides existential unforgeability against chosen message and chosen identity Super Type I and Super Type II adversary if solving the MQ problem is NP-hard. In addition to that, our proposed {\sf Mul-CLS} presents itself as a robust and cost-friendly cryptographic building block for building IoMT networks.
ePrint: https://eprint.iacr.org/2023/1153
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