CoSMeDis: A Distributed Social Media Platform with Formally Verified Confidentiality Guarantees

CoSMeDis: A Distributed Social Media Platform with Formally Verified Confidentiality Guarantees
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CoSMeDis:具有正式验证的保密保证的分布式社交媒体平台

DOI:
10.1109/sp.2017.24
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发表时间:
2017
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通讯作者:
Bauereiss T
Bauereiss T
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作者:
Bauereiss T

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我们介绍了分布式社交媒体平台 CoSMeDis 的设计、实现和信息流验证。该系统由任意数量的通信节点组成,可部署在互联网上的不同位置。其注册用户可以发布内容并建立节点内和节点间的友谊,用于规范对帖子的访问控制。系统内核已在证明助手Isabelle/HOL中进行了验证,并自动提取为Scala代码。我们形式化了一个框架,用于在分布式系统中组成一类信息流安全保证,适用于输入/输出自动机。我们将此框架实例化为 CoSMeDis 信息源的机密属性:帖子、好友请求和好友状态。
We present the design, implementation and information flow verification of CoSMeDis, a distributed social media platform. The system consists of an arbitrary number of communicating nodes, deployable at different locations over the Internet. Its registered users can post content and establish intra-node and inter-node friendships, used to regulate access control over the posts. The system's kernel has been verified in the proof assistant Isabelle/HOL and automatically extracted as Scala code. We formalized a framework for composing a class of information flow security guarantees in a distributed system, applicable to input/output automata. We instantiated this framework to confidentiality properties for CoSMeDis's sources of information: posts, friendship requests, and friendship status.
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