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A Generic Construction of Useful Client Puzzles

机译:有用的客户难题的一般构造

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摘要

Denial of Service (DoS) attacks are serious threats for network societies. For dealing with DoS attacks, Jakobsson and Juels first proposed the notion of useful client puzzles (UCPs) which simultaneously decrease servers' burden and increase clients'. In ACM CCS'04, Diament, Lee, Keromytis, and Yung introduced the decryption-based UCPs. In this paper, we give a general framework for constructing such UCPs which is based on identity-based cryptography along with well-analyzed symmetric key authenticated encryption techniques (without random oracles). By using this framework, we can flexibly construct various UCPs according to different types of system requirements. We also give some instantiations: the first is a UCP based on the Boneh-Boyen Identity based encryption scheme, with provable security in the standard model. Another one is a UCP based on the Boneh-Gentry-Hamburg identity-based encryption scheme, which doesn't require pairings.
机译:拒绝服务(DoS)攻击是对网络社会的严重威胁。为了应对DoS攻击,Jakobsson和Juels首先提出了有用的客户端难题(UCP)概念,该难题同时减轻了服务器的负担并增加了客户端的负担。在ACM CCS'04中,Diament,Lee,Keromytis和Yung引入了基于解密的UCP。在本文中,我们提供了一个构建此类UCP的通用框架,该框架基于基于身份的加密以及经过充分分析的对称密钥认证加密技术(无随机预言)。通过使用此框架,我们可以根据不同类型的系统要求灵活地构造各种UCP。我们还给出了一些实例:第一个实例是基于Boneh-Boyen Identity加密方案的UCP,在标准模型中具有可证明的安全性。另一个是基于Boneh-Gentry-Hamburg基于身份的加密方案的UCP,不需要配对。

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