Browsing by Author "Hwu, Jing-Shyang"

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A Secure Reed-Solomon Code Incentive Scheme for Commercial Ad Dissemination Over VANETs
(2011-11-01)
Tseng, Fu-Kuo
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Liu, Yung-Hsiang
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Hwu, Jing-Shyang
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Chen, Rong-Jaye
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資訊工程學系
A recent surge of research on vehicular ad hoc networks (VANETs) has given us new opportunities and challenges. Aside from safety-related applications, commercial applications also find their way to fully utilize these networks. One of the promising applications is the dissemination of commercial advertisements over VANETs. However, there are uncooperative vehicles that may disrupt the spreading of these advertisements. To encourage cooperation, we want to address proper incentives and security measurements. In this paper, we use Reed-Solomon codes (RS-codes) to construct our incentive scheme and enhance its security by introducing one discrete logarithm representation problem. Our construction yields a secure and practical commercial advertisement dissemination scheme over VANETs.
An efficient identity-based cryptosystem for end-to-end mobile security
(2006-09-01)
Hwu, Jing-Shyang
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Chen, Rong-Jaye
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Lin, Yi-Bing
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資訊工程學系
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Department of Computer Science
In the next generation mobile telecommunications, any third party that provides wireless data services (e.g., mobile banking) must have its own solution for end-to-end security. Existing mobile security mechanisms are based on public-key cryptosystem. The main concern in a public-key setting is the authenticity of the public key. This issue can be resolved by identity-based (ID-based) cryptography where the public key of a user can be derived from public information that uniquely identifies the user. This paper proposes an efficient ID-based encryption algorithm. We actually implement the ID-based encryption schemes and compare the performance to show the advantage of our approach. Our study indicates that our solution outperforms a previously proposed algorithm by 20-35%.