This paper presents a comprehensive survey on the development of Intel SGX (software guard extensions) processors and its applications. With the advent of SGX in 2013 and its subsequent development, the corresponding research works are also increasing rapidly. In order to get a more comprehensive literature review related to SGX, we have made a systematic analysis of the related papers in this area. We first search through five large-scale paper retrieval libraries by keywords (i.e., ACM Digital Library, IEEE/IET Electronic Library, SpringerLink, Web of Science, and Elsevier Science Direct). We read and analyze a total of 128 SGX-related papers. The first round of extensive study is conducted to classify them. The second round of intensive study is carried out to complete a comprehensive analysis of the paper from various aspects. We start with the working environment of SGX and make a conclusive summary of trusted execution environment (TEE). We then focus on the applications of SGX. We also review and study multifarious attack methods to SGX framework and some recent security improvements made on SGX. Finally, we summarize the advantages and disadvantages of SGX with some future research opportunities. We hope this review could help the existing and future research works on SGX and its application for both developers and users.

本文对英特尔SGX（软件保护扩展）处理器及其应用的发展进行了全面的调查。随着2013年新交所的到来及其后续发展，相应的研究工作也在迅速增加。为了获得与新交所相关的更全面的文献综述，我们对该领域的相关论文进行了系统的分析。我们首先通过关键字搜索五个大型论文检索库（即ACM数字图书馆，IEEE / IET电子图书馆，SpringerLink，Web of Science和Elsevier Science Direct）。我们阅读和分析了总计128篇与SGX相关的论文。进行了第一轮广泛研究以对它们进行分类。进行了第二轮深入研究，从各个方面对论文进行了全面的分析。我们从SGX的工作环境入手，并对可信执行环境（TEE）进行总结。然后，我们专注于SGX的应用程序。我们还将审查和研究针对SGX框架的多种攻击方法以及在SGX上进行的一些近期安全改进。最后，我们总结了SGX的优缺点以及一些未来的研究机会。我们希望这篇评论可以对有关SGX及其开发人员和用户的现有和将来的研究工作有所帮助。我们用一些未来的研究机会总结了新交所的优缺点。我们希望这篇评论可以对有关SGX及其开发人员和用户的现有和将来的研究工作有所帮助。我们用一些未来的研究机会总结了新交所的优缺点。我们希望这篇评论可以对有关SGX及其开发人员和用户的现有和将来的研究工作有所帮助。