SaTC: Small: New Challenges in Functional Encryption

最近的计算趋势促使用户和组织将越来越多的敏感数据存储在云中不受其直接控制的第三方位置。为了保护这些数据，需要对其进行加密。然而，传统的加密系统缺乏涉及大而复杂数据的大多数应用程序所需的表现力。云计算的持续采用和部署关键取决于提供保护数据隐私的加密措施的能力，新的加密方案有可能影响这种计算模式的成功程度。函数加密是一种新兴的公钥加密范例，它支持对加密数据进行更细粒度的访问控制。函数加密提供了在密文中指定解密策略的能力，以便只有满足该策略的个人才能解密，或者将关键字与秘密密钥相关联的能力，以便它只能解密包含关键字的文档。该项目研究获得更有效的基于配对的函数加密的方法，以及实现新功能和更具表现力的函数加密方案的方法。

Recent trends in computing have prompted users and organizations to store an increasingly large amount of sensitive data at third party locations in the cloud outside of their direct control. In order to protect this data, it needs to be encrypted. However, traditional encryption systems lack the expressiveness needed for most applications involving big and complex data. The continued adoption and deployment of cloud computing hinges crucially on the ability to provide cryptographic measures that protect the privacy of our data, and new encryption schemes have the potential to affect how successful this computing paradigm will be. Functional encryption is an emerging paradigm for public-key encryption that enables more fine-grained access control to encrypted data. Functional encryption provides the ability to specify a decryption policy in the ciphertext so that only individuals who satisfy the policy can decrypt, or the ability to associate keywords to a secret key so that it can only decrypt documents containing the keyword. This project investigates methods to obtain more efficient pairings-based functional encryption, and methods to realize new functionalities and more expressive functional encryption schemes.