Parallel key-insulated signature scheme without random oracles

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作者：

机构：

[1] Wan, Zhongmei

[2] Li, Jiguo

[3] Hong, Xuan

来源：

| 1600年 / Korean Institute of Communications and Information Sciences卷 / 15期

关键词：

Bilinear pairing - Key exposure - Key updates - Key-insulated signature - Key-insulated signature scheme - Parallel key-insulated signature - Provably secure - Random Oracle methodology - Secret key - Without random oracles;

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摘要：

To alleviate the damage caused by key exposures, Dodis et al. introduced the notion of key-insulated security where secret keys are periodically updated by using a physically insulated helper key. To decrease the risk of helper key exposures, Hanaoka et al. advocated parallel key-insulated mechanism where distinct helpers are independently used in key updates. In this paper, we propose the first parallel key-insulated signature scheme which is provably secure without resorting to the random oracle methodology. Our scheme not only allows frequent key updating, but also does not increase the risk of helper key exposures. © 2013 KICS.

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