2018年4月9日，英国萨里大学梁开泰副教授访问网络安全与密码技术重点实验室，并于当日下午在成功楼603室作了题为“可保护隐私的外包数据分享和搜索”的学术报告。

在报告中，梁开泰副教授先介绍了报告背景，并指出在云/大数据时代，个人和行业可以将他们的数据外包到“未知”云，以消除本地数据存储和管理的成本。云支持的远程数据存储和检索服务允许用户随时随地访问数据。然而，由于数据超出了“物理控制”，它们会为用户带来安全和隐私问题。进而引出解决问题的办法，因此他详细介绍了基于云的数据搜索与共享。在讲述加密过的外包数据分享之后，他着重介绍了代理重加密技术和可搜索加密技术的研究发展历史和相关应用。最后，他对可保护隐私的外包数据分享和搜索作出简单的总结与工作展望。

报告之后，梁开泰副教授耐心解答了老师和同学们所提出的许多有趣的问题，大家对此次报告好评如潮，收获颇丰。

专家简介：Dr Kaitai Liang is an Assistant Professor in Secure Systems at the University of Surrey, UK, and member of the Surrey Centre for Cyber Security, a GCHQ recognised UK Academic Centre of Excellence in Cyber Security Research. Kaitai received the PhD degree in computer science (applied cryptography direction) from City University of Hong Kong in 2014. Prior to SURREY, Kaitai was a Lecturer in School of Computing, Mathematics and Digital Technology, Manchester Metropolitan University; postdoctoral researcher at Department of Computer Science, Aalto University (Finalnd); visiting scholar at Department of Computer Science, UCL; visiting scholar at KU LEUVEN (Belgium), Sapienza University of Rome (Italy) and University of Wollongong (Australia); research intern in Institute for Infocomm Research (Singapore). Kaitai has been involved in a few European funded projects. His main research interests are applied crypto, data security, big data security, blockchain, smart contract and privacy-enhancing technology. Kaitai has published a series of research works, applying secure tools to tackle real-world problems, in many high tier international journals (e.g., IEEE TIFS, IEEE NETWORK, and IEEE Transactions on Industrial Informatics). Kaitai has served as TPC for many renown international security/privacy conferences, e.g., ACNS, TRUSTCOM, ASIACCS, ACISP, ProvSec, and he was the pc chair of International workshop on Security in Big Data. Kaitai is also an official ISO member of UK ISO Crypto Sub Committee IST/33/2.