Department of Computer Science and Engineering, Maulana Azad National Institute of Technology, Bhopal 462003, India.
Comput Intell Neurosci. 2022 Apr 20;2022:4788031. doi: 10.1155/2022/4788031. eCollection 2022.
The recent advent of cloud computing provides a flexible way to effectively share data among multiple users. Cloud computing and cryptographic primitives are changing the way of healthcare unprecedentedly by providing real-time data sharing cost-effectively. Sharing various data items from different users to multiple sets of legitimate subscribers in the cloud environment is a challenging issue. The online electronic healthcare system requires multiple data items to be shared by different users for various purposes. In the present scenario, COVID-19 data is sensitive and must be encrypted to ensure data privacy. Secure sharing of such information is crucial. The standard broadcast encryption system is inefficient for this purpose. is a mechanism that enables secure sharing of different messages to different set of users efficiently. We propose an efficient and secure data sharing method with shorter ciphertext in public key setting using asymmetric (Type-III) pairings. The Type-III setting is the most efficient form among all pairing types regarding operations required and security. The semantic security of this method is proven under decisional BDHE complexity assumption without random oracle model.
云计算的出现为在多个用户之间有效地共享数据提供了一种灵活的方式。云计算和密码原语正在通过提供经济高效的实时数据共享，以前所未有的方式改变医疗保健行业。在云环境中，从不同用户共享各种数据项到多组合法订户是一个具有挑战性的问题。在线电子医疗保健系统需要不同用户为各种目的共享多个数据项。在当前情况下，COVID-19 数据是敏感的，必须进行加密以确保数据隐私。安全共享此类信息至关重要。标准的广播加密系统对此目的效率不高。基于门限的加密方案是一种机制，它可以在公钥设置中高效地实现不同消息到不同用户组的安全共享。我们提出了一种使用非对称（III 型）配对在公钥设置中具有较短密文的高效和安全的数据共享方法。在涉及的操作和安全性方面，III 型设置是所有配对类型中最有效的形式。在没有随机 oracle 模型的情况下，该方法的语义安全性在决策性 BDHE 复杂性假设下得到证明。
