Guo Lifeng, Yau Wei-Chuen
School of Computer and Information Technology, Shanxi University, Taiyuan, 030006, Shanxi, People's Republic of China,
J Med Syst. 2015 Feb;39(2):11. doi: 10.1007/s10916-014-0178-y. Epub 2015 Jan 30.
Searchable encryption is an important cryptographic primitive that enables privacy-preserving keyword search on encrypted electronic medical records (EMRs) in cloud storage. Efficiency of such searchable encryption in a medical cloud storage system is very crucial as it involves client platforms such as smartphones or tablets that only have constrained computing power and resources. In this paper, we propose an efficient secure-channel free public key encryption with keyword search (SCF-PEKS) scheme that is proven secure in the standard model. We show that our SCF-PEKS scheme is not only secure against chosen keyword and ciphertext attacks (IND-SCF-CKCA), but also secure against keyword guessing attacks (IND-KGA). Furthermore, our proposed scheme is more efficient than other recent SCF-PEKS schemes in the literature.
可搜索加密是一种重要的密码原语，它能够对云存储中的加密电子病历（EMR）进行隐私保护的关键字搜索。这种可搜索加密在医疗云存储系统中的效率至关重要，因为它涉及智能手机或平板电脑等客户端平台，这些平台的计算能力和资源有限。在本文中，我们提出了一种高效的无安全通道的带关键字搜索的公钥加密（SCF-PEKS）方案，该方案在标准模型中被证明是安全的。我们表明，我们的SCF-PEKS方案不仅能抵御选择关键字和密文攻击（IND-SCF-CKCA），还能抵御关键字猜测攻击（IND-KGA）。此外，我们提出的方案比文献中其他最近的SCF-PEKS方案更高效。
