【摘 要】
：
There are privacy leakage risks and degradation of performance when verifying the integrity of components with existing methods in a cloud.To address the issue,this work proposes a structural integrit
【机 构】
：
Key Laboratory of Aerospace Information Security and Trusted Computing,Ministry of Education,School
【出 处】
：
第十二届中国可信计算与信息安全学术会议
论文部分内容阅读
There are privacy leakage risks and degradation of performance when verifying the integrity of components with existing methods in a cloud.To address the issue,this work proposes a structural integrity verification approach,named SIV,to enhance the privacy and performance.It includes three processes: proof organization,proof transformation and integrity judgement.By introducing a Merkle tree technique,the integrity of a constituent part of a cloud component on a node is represented by a root value in proof organization.Then the Merkle root value is masked in proof transformation.The first two processes are executed inside the cloud,ensuring all raw proofs are processed on their born nodes and never go nowhere.In this way the attack surfaces to proofs could be minimized,and the privacy leakage risks are eliminated from the source.With all masked proofs from the cloud,a structural feature is extracted and validated in integrity judgement on TPV.A verification result will be given after the validation.In the three processes there are some computations added,but there are a great reduction of proof data size,which could balance the performance.The experimental results on three datasets show that the proposed approach is effective in raising integral proofs or locating compromised constituent parts of a cloud component.In the meantime the time overhead is within an acceptable range.
其他文献
电沉积法在源片制备技术方面具有沉积率高、沉淀稳固、均匀性好、设备简单等优点.本试验探索了水溶液体系中电沉积法制备铀裂变镀片的条件并制备了若干不同类型裂变镀片成品.采用铂丝作为阴极电极,电解液为0.15mol/L 草酸铵溶液,探索了镀片基材、电极处理工艺、电流密度、沉积时间、pH 值、镀液温度、电解液中UO2(NO3)2 浓度等条件对电沉积量、镀层均匀性以及镀层稳固性的影响,确定了电沉积法制备裂变镀
在裂变反应堆内引入"转换靶"，将热中子转换为14MeV 的聚变中子，是一种获得高强度聚变场的便捷方式。转换靶材料中的6Li 吸收中子后，产生氚离子，氚在电离的过程中与D 或Li 发生聚变放出中子。这样，就在堆芯内获得了包含裂变中子和聚变中子的裂变-聚变混合场。对转换靶问题进行理论分析，并展开了转换效率测量实验。
钠冷快堆中使用液态金属钠作为冷却剂，但是液体金属钠的化学性质非常活泼，为此钠冷快堆中设计了多层专门的防护措施，最大限度减少了钠冷却剂的泄漏。虽然液体金属钠从冷却剂系统中泄漏的概率很小，但是在严重事故工况下，容纳金属钠的压力容器仍然有破坏的可能，导致堆芯碎片、高温液体钠和混凝土结构材料直接接触，发生强烈的热、化学和机械效应。在美国、法国、英国等快堆技术先进国家早在20 世纪70 年代就开始积极开展钠
Virus,trojan and malware on embedded systems have brought signif-icant effect for the information security of the industrial control systems(ICS).ICS as the national core infrastructure,the security a
针对域间路由协议BGP 的LDDoS 攻击能够使得目标链路路由震荡，造成级联效应，导致整个互联网瘫痪并无法通过技术手段修复，是当前互联网面临的最大安全威胁之一。考虑到LDDoS 的网络规模需求，目前针对LDDoS 攻击的研究都是基于离散事件模拟技术进行评测，但其存在逼真度低、准确性差的问题。为此，提出了一种基于轻量级虚拟化技术的LDDoS 仿真验证方法，可有效兼顾仿真规模与仿真逼真性。围绕LDDo
In order to solve the data transmission security problem of the sensing network,this paper proposes a multi-level trusted clustering mech-anism.The proposed mechanism combines multi-level clustering,i
In the trusted testing of cloud platforms,isolation testing of virtual networks is one of the important tasks.The traditional isolation detection method only extracts network con_guration information
The android operating system provides a rich inter-component communication(ICC)method to bring enormous convenience.However,the android ICC also increases security risks.To address this problem,a form
The Internet of Things connects a large number of real objects with the Internet through a variety of sensing technologies and it is a network that implements the concept of connected objects.However,