Comments and Improvements on Chameleon Hashing Without Key Exposure Based on Factoring
نویسندگان
چکیده
In this paper, we present some security flaws of the keyexposure free chameleon hash scheme based on factoring [9]. Besides, we propose an improved chameleon hash scheme without key exposure based on factoring which enjoys all the desired security notions of chameleon hashing.
منابع مشابه
Identity-based chameleon hashing and signatures without key exposure
The notion of chameleon hash function without key exposure plays an important role in designing secure chameleon signatures. However, all of the existing keyexposure free chameleon hash schemes are presented in the setting of certificatebased systems. In 2004, Ateniese and de Medeiros questioned whether there is an efficient construction for identity-based chameleon hashing without key exposure...
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Article history: Received 8 April 2010 Received in revised form 18 March 2011 Accepted 28 March 2011 Available online 6 May 2011 0045-7906/$ see front matter 2011 Elsevier Ltd doi:10.1016/j.compeleceng.2011.03.011 q Reviews processed and approved for publication ⇑ Corresponding author. E-mail address: [email protected] (X. Chen). Chameleon signatures simultaneously provide the properties of ...
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ورودعنوان ژورنال:
- IACR Cryptology ePrint Archive
دوره 2009 شماره
صفحات -
تاریخ انتشار 2009