Shared information generating apparatus and recovering apparatus


Ontology type: sgo:Patent     


Patent Info

DATE

N/A

AUTHORS

Satoshi Obana

ABSTRACT

There is disclosed a system for identifying falsified secret information shares included in k secret information shares used to recover secret information according to a (k,n)-threshold secret sharing scheme, and producing falsified secret information shares of reduced size. A shared information generating apparatus generates cheater identifying information Ai(i=1, 2, . . . , n) using n secret information shares Vi generated according to the (k,n)-threshold secret sharing scheme and random polynomials. A recovering apparatus detects cheated secret information shares using the arbitrary k secret information shares and k cheater identifying information, and recovers the secret information from the k secret information shares if it detects no cheated secret information shares. More... »

Related SciGraph Publications

  • 1989-10. How to share a secret with cheaters in JOURNAL OF CRYPTOLOGY
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