A research on designing efficient and secure functional encryption schemes with tamper-proof devices

网络服务中的数据泄露已经成为当今社会的一个严重问题。为了克服这个问题，可以使用功能性加密方案。功能加密方案实现了对加密数据的访问控制机制。然而，由于密钥长度较长且加密/解密成本较高，功能性加密方案尚未在实际中使用。在这项研究中，我们开发了使用防篡改设备来实现高性能功能加密方案的基础技术。我们还对密码防篡改设备进行了安全评估。

Data leakage from network services has been a serious problem in our society. To overcome this problem, functional encryption schemes can be used. Functional encryption schemes realize an access control mechanism over encrypted data. However, functional encryption schemes are not yet in practical use due to the long key lengths, and their high encryption/decryption costs. In this research, we develop fundamental techniques to realize high performance functional encryption schemes using tamper-proof devices. We also give a security evaluation on cryptographic tamper-proof devices.