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Practical RSA signature scheme based on periodical rekeying for wireless sensor networks

Practical RSA Signature Scheme Based on Periodical Rekeying for Wireless Sensor Networks SHIH-YING CHANG, YUE-HSUN LIN, and HUNG-MIN SUN, National Tsing Hua University MU-EN WU, Academia Sinica Broadcast is an ef cient communication channel on wireless sensor networks. Through authentic broadcast, deployed sensors can perform legitimate actions issued by a base station. According to previous literature, a complete solution for authentic broadcast is digital signature based on asymmetric cryptography. However, asymmetric cryptography utilizes expensive operations, which result in computational bottlenecks. Among these cryptosystems, Elliptic Curve Cryptography (ECC) seems to be the most ef cient and the most popular choice. Unfortunately, signature veri cation in ECC is not ef cient enough. In this article, we propose an authentic broadcast scheme based on RSA. Unlike conventional approaches, the proposed scheme adopts short moduli to enhance performance. Meanwhile, the weakness of short moduli can be xed with rekeying strategies. To minimize the rekeying overhead, a Multi-Modulus RSA generation algorithm, which can reduce communication overhead by 50%, is proposed. We implemented the proposed scheme on MICAz. On 512-bit moduli, each veri cation spends at most 0.077 seconds, which is highly competitive with other public-key cryptosystems. Categories and Subject Descriptors: C.2.0 [Computer-Communication Networks]: http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png ACM Transactions on Sensor Networks (TOSN) Association for Computing Machinery

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