Invention Grant
US08549290B2 Secret sharing system, sharing apparatus, share management apparatus, acquisition apparatus, processing methods thereof, secret sharing method, program, and recording medium
有权
秘密共享系统，共享装置，共享管理装置，获取装置，其处理方法，秘密共享方法，程序和记录介质
- Patent Title: Secret sharing system, sharing apparatus, share management apparatus, acquisition apparatus, processing methods thereof, secret sharing method, program, and recording medium
- Patent Title (中): 秘密共享系统，共享装置，共享管理装置，获取装置，其处理方法，秘密共享方法，程序和记录介质
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Application No.: US13264445Application Date: 2010-04-23
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Publication No.: US08549290B2Publication Date: 2013-10-01
- Inventor: Ryo Nishimaki , Koutarou Suzuki
- Applicant: Ryo Nishimaki , Koutarou Suzuki
- Applicant Address: JP Tokyo
- Assignee: Nippon Telegraph and Telephone Corporation
- Current Assignee: Nippon Telegraph and Telephone Corporation
- Current Assignee Address: JP Tokyo
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2009-106031 20090424
- International Application: PCT/JP2010/057274 WO 20100423
- International Announcement: WO2010/123114 WO 20101028
- Main IPC: H04L29/06
- IPC: H04L29/06
Abstract:
A secure secret sharing system is implemented. Shares SH(α, h(α)) are generated by secret sharing of secret information separately for each subset SUB(α); each of share management apparatuses PA(α, h(α)) generates a shared secret value DSH(α, h(α)) by performing a common operation to a corresponding share SH(α, h(α)) and common information containing a common value σ(α) shared in each subset SUB(α); and an acquisition apparatus generates a reconstructed secret value SUBSK(α) by reconstruction processing for each subset SUB(α), using a plurality of shared secret values DSH(α, h(α)) corresponding to the same subset SUB(α), and generates generation information SK by using the reconstructed secret values SUBSK(α).
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