Forward-Secure Group Signatures from Pairings
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概要
- 論文の詳細を見る
To reduce the damage of key exposures, forward-secure group signature schemes have been first proposed by Song. In the forward-secure schemes, a secret key of a group member is updated by a one-way function every interval and the previous secret key is erased. Thus, even if a secret key is exposed, the signatures produced by the secret keys of previous intervals remain secure. Since the previous forward-secure group signature schemes are based on the strong RSA assumption, the signatures are longer than pairing-based group signatures. In addition, the complexity of the key update or signing/verification is O(T), where T is the total number of intervals. In this paper, a forward-secure group signature scheme from pairings is proposed. The complexity of our key update and signing/verification is O(log T).
- （社）電子情報通信学会の論文
- 2010-11-01
著者
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HIRA Yuta
Department of Communication Network Engineering, Okayama University
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Nakanishi Toru
Department Of Biochemistry Nagoya University School Of Medicine
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Hira Yuta
Department Of Communication Network Engineering Okayama University
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Nakanishi Toru
Okayama Univ. Okayama‐shi Jpn
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Funabiki Nobuo
Okayama Univ. Okayama‐shi Jpn
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Funabiki Nobuo
Department Of Communication Network Engineering Faculty Of Engineering Okayama University
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