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題名: | An Improved Conference-key Agreement Protocol with Forward Secrecy |
作者: | Tseng, Yuh-Min |
貢獻者: | 數學系 |
關鍵詞: | Forward secrecy;Fault tolerant;Key agreement |
日期: | 2005-04
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上傳時間: | 2012-07-03T03:44:32Z
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出版者: | IOS Press Amsterdam |
摘要: | Recently, Tzeng proposed a provably secure and fault-tolerant conference-key agreement protocol. It requires only a constant number of rounds to establish a conference key among all honest participants. This article will show that Tzeng's protocol does not offer forward secrecy. We say that a conference-key agreement protocol offers forward secrecy if the long-term secret key of any participant is compromised and will not result in the compromise of the previously established conference keys. This property is important and has been included in most key agreement protocols and standards. In this paper, an improvement based on Tzeng's protocol is proposed and it achieves forward secrecy. Under the Diffie-Hellman decision problem assumption and the random oracle model, we show that the proposed protocol can withstand passive attacks and is secure against impersonator's attacks. The improved protocol requires a constant number of rounds to compute a conference key. The improved protocol provides fault-tolerance. |
關聯: | Informatica, 16(2): 275-284 |
顯示於類別: | [數學系] 期刊論文
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文件中的檔案:
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大小 | 格式 | 瀏覽次數 |
2020100910021.pdf | 85Kb | Adobe PDF | 525 | 檢視/開啟 |
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