| Verifiable Secret Redistribution for Proactive Secret Sharing Schemes |
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| 作者姓名： | 于佳 孔凡玉 李大兴 |
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| 作者单位： | Inst. of Network Security Shandong Univ. Jinan 250100 China，College of Information Eng. Qingdao Univ. Qingdao 266071，Inst. of Network Security Shandong Univ. Jinan 250100 China，Inst. of Network Security Shandong Univ. Jinan 250100 China |
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| 基金项目： | NationalHighTechnologyResearchandDevelopmentProgramofChina(863Program)(No.2001AA141120) |
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| 摘 要： | Introduction Ina(t,n)secretsharingscheme1,2],asecret issharedamongnshareholders.Anytsharehold-erscancooperatetoreconstructthesecret,while fewerthantcan't.Theverifiablesecretsharing(VSS)3,4]canverifythecorrectnessofthesecret sharesdistributedbyadealer.Animportantex-tensionofsecretsharingsystemsisthresholdcryp-tosystemschemes5,6].Inproactiveschemes7-11],thewholelifetimeofthesecretisdividedinto manytimeperiods,andsharesarerenewedineach period.PSSschemescanrenewthesharesofthe secret,butcan'…
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| 关 键 词： | 分配方法 共享技术 网络安全 技术性能 |
| 文章编号： | 1007-1172（2006）02-0236-06 |
| 收稿时间： | 2005-10-10 |
Verifiable Secret Redistribution for Proactive Secret Sharing Schemes |
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| YU Jia,KONG Fan-yu,LI Da-xing.Verifiable Secret Redistribution for Proactive Secret Sharing Schemes[J].Journal of Shanghai Jiaotong university,2006,11(2):236-241. |
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| Authors: | YU Jia KONG Fan-yu LI Da-xing |
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| Abstract: | A new scheme to verifiably redistribute a secret from the old to new shareholders without reconstruction of the secret is presented in this paper. The scheme allows redistribution between different access structures and between different threshold schemes. A point worth mentioning is that this verifiable secret redistribution (VSR) scheme can identify dishonest old shareholders during redistribution without any assumption. A certain technique is adopted to verify the correctness of the old shares of the secret. As a result, the scheme is very efficient. It can be applied to proactive secret sharing (PSS) schemes to construct more flexible and practical proactive secret sharing schemes. |
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| Keywords: | secret sharing verifiable secret redistribution proactive secret sharing |
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