Efficient multistage secret sharing scheme using bilinear map
Efficient multistage secret sharing scheme using bilinear map
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DOI：
10.1049/iet-ifs.2013.0046
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发表时间：
2014-06
期刊：
影响因子：
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通讯作者：
Mitra Fatemi;Reza Ghasemi;T. Eghlidos;M. Aref
中科院分区：
文献类型：
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作者：
Mitra Fatemi;Reza Ghasemi;T. Eghlidos;M. Aref
在多级秘密共享(MSSS)方案中，参与者的授权子集可以在不同阶段恢复多个秘密。一阶段多秘密共享(OSMSS)方案是同时恢复所有秘密的MSSS方案的特例。在这些方案中，除了个人股份外，交易商还应该向参与者提供一些与秘密相关的公共价值。公共价值观的数量越少，该计划的效率就越高。期望MSSS和OSMSS方案提供计算安全性。在这项研究中，作者证明了在OSMSS方案中，参与者的任何未经授权的联盟都可以减少秘密的不确定性。此外，在MSSS方案中，恢复秘密会减少未恢复秘密的不确定性。此外，通过引入一种新的基于Weil配对的多用途MSSS方案，与以前的方案相比，它们减少了公开值的数量。
In a multistage secret sharing (MSSS) scheme, the authorised subsets of participants could recover a number of secrets in different stages. A one-stage multisecret sharing (OSMSS) scheme is a special case of MSSS schemes in which all the secrets are recovered simultaneously. In these schemes, in addition to the individual shares, the dealer should provide the participants with a number of public values associated with the secrets. The less the number of public values, the more efficient is the scheme. It is desired that the MSSS and OSMSS schemes provide computational security. In this study, the authors show that in the OSMSS schemes any unauthorised coalition of the participants can reduce the uncertainty of the secrets. In addition, in MSSS schemes recovering a secret causes reducing uncertainty of the unrecovered secrets. Furthermore, by introducing a new multi-use MSSS scheme based on weil pairing, they reduce the number of public values comparing with the previous schemes.