Securing Data in the Cloud

大数据和云计算带来了新的隐私挑战。我们的个人设备（例如，笔记本电脑，移动电话，平板电脑）带宽低，只能执行轻量级计算。这些设备依靠云来对大型数据集执行搜索查询和其他类型的计算。但是，数据集可能包含敏感信息（例如医疗、财务、个人记录），为了维护安全和隐私，这些信息应在云中加密。这就产生了一个根本性的问题：我们的个人设备无法使用云对加密数据进行计算。我们能否在不泄露数据或程序描述的情况下，对云中的加密数据运行一个程序？我们可以验证在云中执行的计算结果，而无需重新下载数据和重新执行工作吗？

Big data and cloud computing create new privacy challenges. Our personal devices (e.g., laptops, mobile phones, tablets) have low bandwidth and can perform only lightweight computations. These devices rely on the cloud to perform search queries and other types of computations over large datasets. However, the datasets may contain sensitive information (e.g., medical, financial, personal records) that should be encrypted in the cloud, in order to maintain security and privacy. This creates a fundamental problem: our personal devices cannot use the cloud to perform computations over encrypted data. Can we run a program over encrypted data in the cloud without revealing the data or the description of the program? Can we authenticate the results of the computations performed in the cloud without re-downloading the data and re-doing the work?