基于单服务器的模指数安全外包计算方案

doi:10.11959/j.issn.1000-0801.2018001

Abstract

Abstract:

At present,in discrete-log based cryptographic protocols,most of the computational models of modular exponentiation are for primes,while less work has been done for composite.What’s more,most schemes are based on two servers,in which it requires at least one server to be honest.However,there may not be a fully trusted cloud server in the actual environment.Then a new secure method for outsourcing exponentiation modular a composite which based on a single server was proposed.The scheme used a new mathematical division method,it could ensure the privacy of the base and exponentiation.Compared with the existing schemes,the checkability of our scheme can be greatly improved.The user can detect the error result with the probability of 119/120.

Key words: cloud computing, outsource computing, modular exponentiation

CLC Number:

TN918

Weijie DING. Secure outsource computing scheme of modular exponentiation based on single server[J]. Telecommunications Science, 2018, 34(1): 80-86.

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References 14

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	参考文献[13]方案	本文方案
安全模型	单UP	单UP
MM	12+1.5χ	13+1.5lgt₁+1.5lgt₂+1.5lgr
MInv	4	4
Invoke(Rand)	6	4
Invoke(U)	4	6
可验证概率	1/2	119/120

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Secure outsource computing scheme of modular exponentiation based on single server

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