Abstract
Being a member of the post quantum cryptography family, multivariate public key cryptographic (MPKC) system enjoys many useful properties such as fast implementation and moderate resources requirement, which is quite suitable for the wireless sensor network (WSN). However, MPKC system requires the usage of large public and private keys to ensure security which makes it inapplicable to wireless sensors with very limited system resources. In this paper, we propose an online/offline signature scheme based on a well known MPKC scheme: unbalanced oil and vinegar signature scheme for the wireless sensor network. Our scheme can reduce the cost of hardware running on signing process and the storage space of private key in the online signing phase. What is more, by combining a recent technique, the total storage requirement in a WSN node reduces by 85.8 % for the recommended parameters, which makes our new scheme feasible for the practical deployment on the WSN platforms.
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