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NCUEIR > College of Science > math > Periodical Articles > Item 987654321/12139

Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/12139

Title:	A Unified Approach to Secret Sharing Schemes with Low Distribution Cost
Authors:	Chien, Hung-Yu;Jan, Jinn-Ke;Tseng, Yuh-Min
Contributors:	數學系
Keywords:	Cryptography;Secret sharing 密碼學;秘密分享
Date:	2002-11
Issue Date:	2012-07-03T03:43:30Z
Publisher:	Taylor&Francis
Abstract:	In secret sharing schemes, the secret holder has to distribute secret shares to each participant before distributing the secrets. To distribute or redistribute shares is a very costly process with respect to both time and resources. Unlike previous works, where different approaches are proposed for different scenarios, we propose a unified approach for both threshold-based schemes and generalized group-oriented cryptosystems. This unified implementation has the following merits: (1) With a unified approach, the implementation requires much less overhead than its counterparts when various secret sharing problems are simultaneously involved; (2) The Secret Holder (SD) does not need to redistribute new secret shares after the secret reconstruction; (3) The SD can, dynamically and efficiently. determine the capacities (weight) of each user on recovering the secrets, and the threshold values of the secrets; (4) To dynamically adjust the capacities of users, the SD does not need to refresh the shadow of each user and each user just memorizes one secret shadow. 在秘密分享機制中，蜜一擁有者再分享秘密前必須先透過ㄧ安全管道將次秘密分送到參與者手上，這步驟是十分耗費資源及費時。不同於過去研究中分別採用不同機制以解決不同的分享問題，本論文採用同一機制解決所有分享問題。這統一的機制有如下數項優點：（１）因對所以分享問題皆採用同一機制，其實作成本可降低很多；（２）在參與者回復部份秘密後，秘密擁有者不須重送次秘密；（３）秘密擁有者可動態且有效率的決定參與者的權值；（４）參與者只需記憶一份次秘密及使擁有高於一的權值。
Relation:	Journal of The Chinese Institute of Engineers, 25(6): 723-733
Appears in Collections:	[math] Periodical Articles

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