Over the years, the performance of devices used to gather sensitive medical information about individuals has increased substantially. These include implanted devices in the body, placed on or around the body, creating a Wireless body area network. Security and privacy have been a greater concern over a period of time due to the sensitive nature of the data collected and transmitted by the network. It has been noticed that various techniques have been applied to secure the data and provide privacy in WBANs but with a tradeoff of execution overhead. Although the latest available anonymous authentication schemes provide privacy and security but due to the limited computation capacity of WBAN devices, these schemes show greater time cost for authentication and consume more processing time. We review two latest anonymous authentication schemes for the WBAN environment in terms of computation cost. These two schemes provide anonymous authentication and use encryption to secure the data and ensure privacy. Then we analyze a recent lightweight authentication scheme proposed for wearable devices which provides anonymity and privacy along with security with very low computation cost. This scheme uses hash functions in order to obtain authentication and anonymity and doesn’t use encryption in the authentication process. This scheme is not proposed for the WBAN environment, but it can be applied on the WBAN environment with necessary variations. The comparison of these available schemes shows clearly that the computation cost is considerably decreased by applying the latest authentication scheme in the WBAN environment. We propose a new authentication scheme for the WBAN environment based on the light-weight scheme proposed for wearable devices. The detailed analysis shows that our proposed scheme minimizes the computation cost and maintains the privacy and security along with anonymous authentication.

多年来，用于收集有关个人的敏感医学信息的设备的性能已大大提高。这些包括在体内或周围放置的植入式设备，从而创建无线人体局域网。由于网络收集和传输的数据的敏感性质，安全性和隐私在一段时间内一直是一个更大的关注点。已经注意到，已经采用了各种技术来保护数据并在WBAN中提供隐私，但是要权衡执行开销。尽管最新的可用匿名身份验证方案提供了隐私和安全性，但是由于WBAN设备的计算能力有限，这些方案显示出更大的身份验证时间成本并消耗了更多的处理时间。我们从计算成本的角度回顾了WBAN环境的两种最新的匿名身份验证方案。这两种方案提供匿名身份验证，并使用加密来保护数据并确保隐私。然后，我们分析了最近针对可穿戴设备提出的轻量级身份验证方案，该方案可提供匿名性和隐私以及安全性，且计算成本非常低。该方案使用哈希函数以获得身份验证和匿名性，并且在身份验证过程中不使用加密。该方案未针对WBAN环境提出，但可以在必要的变化下应用于WBAN环境。这些可用方案的比较清楚地表明，通过在WBAN环境中应用最新的身份验证方案，可大大降低计算成本。我们基于为可穿戴设备建议的轻量级方案，为WBAN环境提出了一种新的认证方案。详细的分析表明，我们提出的方案将计算成本降至最低，并与匿名身份验证一起维护了隐私和安全性。