Security Analysis of some Blind Proxy Signatures
Publish place: 07th Iranian Security Community Conference
Publish Year: 1389
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
ISCC07_013
تاریخ نمایه سازی: 11 آذر 1389
Abstract:
Two of the most important security requirements of a blind proxy signature scheme are unlinkability which states that it should be impossible to establish a link between the identity of a proxy signer and his/her signature-message pair and unforgeability which states that it should be impossible to create a valid proxy signature instead of proxy signer. In this paper, we show that some blind proxy signature schemes that were proposed without the Trusted Third Party don't satisfy the unlinkabiliy or uforgeabililty property. In some of them, the original signer can track who receives proxy capability and in others, a dishonest original signer can forge the proxy key and generate a valid blind proxy signature using a forgery attack instead of the proxy signer.
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Authors
Maryam Rajabzadeh Asaar
EE Department, Sharif University of Technology, Tehran, Iran
Mahmoud Salmasizadeh
Electronics Research Center, Sharif University of Technology, Tehran, Iran
Alireza Sharifi
EE Department, Sharif University of Technology, Tehran, Iran