Wireless body area networks (WBANs) is a critical research focus at present, providing a reliable and smart healthcare system to monitor the physical condition of the patient. Only the authorized user can access the WBANs since the collected data is very personal and sensitive. In this paper, we present a certificateless signcryption scheme based on RSA and then design an efficient data access control scheme for WBANs using the proposed signcryption scheme. The system does not have the certificate management and the key escrow problems. The most striking one is that it is based only on the widely used RSA cryptosystem without the bilinear pairing, which is advantageous to its realization in industry. The analysis shows that the scheme is secure in the random oracle model and simultaneously satisfies confidentiality, authentication, integrity, non-repudiation, and public ciphertext verification. Besides, it has reasonable computational and communication costs. To our knowledge, this is the first certificateless signcryption scheme based on RSA to date.

无线人体局域网（WBAN）是当前的一项重要研究重点，它提供了一种可靠且智能的医疗保健系统来监视患者的身体状况。由于收集的数据非常个人和敏感，因此只有授权用户才能访问WBAN。在本文中，我们提出了一种基于RSA的无证书签密方案，然后使用提出的签密方案设计了一种有效的WBAN数据访问控制方案。该系统没有证书管理和密钥托管问题。最引人注目的是它仅基于广泛使用的RSA密码系统而没有双线性配对，这有利于其在工业上的实现。分析表明，该方案在随机预言机模型中是安全的，并且同时满足机密性，身份验证，完整性，不可否认性和公共密文验证。此外，它具有合理的计算和通信成本。据我们所知，这是迄今为止基于RSA的第一个无证书签密方案。