ID	原文	译文
5214	在标准模型下，基于计算性 Diffie-Hellman 假设完成安全证明。	The scheme was proved secure based oncomputational Diffie-Hellman assumption in the standard model.
5215	最后从理论和实验 2 个方面对所提方案的效率与功能进行分析，	Finally, the functionality and efficiency of the proposedscheme were analyzed and verified.
5216	结果表明所提方案可以安全地实现属性级用户撤销，并具有快速解密的能力。	The experimental results show that the proposed scheme can safely implement attribute-level user revocation and has the ability to quickly decrypt, which greatly improves the system efficiency.
5217	随着移动智能终端的普遍运用，基于位置服务（LBS）成为了人们生活中必不可少的部分，在提供便捷生活服务的同时，也引发了用户隐私信息泄露的隐患。	The prevalence of mobile intelligent terminals gives the location-based service (LBS) more opportunities to enrichmobile users' lives. However, mobile users enjoy the convenience with the cost of personal privacy.
5218	在考虑背景信息存在的同时，进一步地考量了用户自身和服务提供商短期缓存的查询记录，避免了攻击者利用查询信息的可能性对用户的隐私信息进行猜测并实现推断攻击。	The side information and mobile user's recent requirement records were considered, which were obtained or stored by the service provider.
5219	基于用户隐私信息自关联的前提下，提出了 2 种隐私保护方案——简易隐私自关联的隐私保护算法（Ba-2PS）和扩展隐私自关联的隐私保护算法（En-2PS），其中 En-2PS 从时间和查询范围 2 个维度扩展了简易隐私自关联的隐私保护算法，提高了从匿名位置单元和匿名查询内容中推测用户真实信息的不确定性。	Based on the existence of recent requirement records, adversary can employ the inference attack to analysis mobile user's personal in-formation. Therefore, two schemes were proposed, including of basic privacy self-correlation privacy-preserving scheme(Ba-2PS) and enhanced privacy self-correlation privacy-preserving scheme(En-2PS). In En-2PS, the privacy-preservingscheme was designed from two dimensions of aspects of time factor and query region, which increased the uncertainty infer-ring out the real information.
5220	最后，通过隐私性证明和实验结果证明了方案的有效性和安全性。	Finally, the privacy analysis was illustrated to proof En-2PS's privacy degree, then the perfor-mance and privacy evaluation results indicate that En-2PS is effective and efficient.
5221	区块链是随着数字货币商品兴起的去中心化基础架构，具有安全可信、顽健性高等特点。	Blockchain is a decentralized architecture emerging with cryptocurrencies, which is credible and robust.
5222	首次提出区块链环境下的网络隐蔽信道模型，具有抗干扰性、抗篡改性、多线路通信性、接收方匿名性、线路无关性，可以克服现有网络环境下的隐蔽信道特性缺陷等弊端。	A network covert channel model in blockchain environment was proposed for the first time, which was anti-interference,anti-tamper modification, multi-line communication, receiver anonymity and line independence. The shortcomings of network covert channel in existing network environment could be tackled by the new type of network covert channel,such as characteristic defect. etc.
5223	首先提出了区块链网络隐蔽信道模型，用形式化方法建模并证明了抗干扰性和抗篡改性；	Firstly, A network covert channel model in blockchain environment was presented byformal method, its anti-interference and anti-tamper modification was proved.