Data security

The invention relates to data security. The invention provides a data processing system. The data processing system includes receiving circuitry for receiving a request from a requester to use decrypted data obtained by decrypting encrypted data. The trusted execution circuitry provides a trusted execution environment. The trusted execution circuitry is configured to securely store the policy, retrieve a key within the trusted execution environment, where the key is associated with decrypted data or encrypted data, and respond to the request based on the policy and one or more characteristics of the requester. 本发明题为"数据安全性"。本发明提供了一种数据处理系统，该数据处理系统包括用于从请求者接收使用通过解密加密数据获得的解密数据的请求的接收电路。可信执行电路提供可信执行环境。可信执行电路被配置为：安全地存储策略，在可信执行环境内获取密钥，其中，该密钥与解密数据或加密数据相关联，并且基于该策略和请求者的一个或多个特性响应该请求。