For the security need of the current electronic bidding, an Identiiy-based Cryptosystem(IBC) electronic bidding scheme is proposed. Through improving key management system of IBC, this scheme solves the problem of 1BC in the application of electronic bidding, such as keydistribution, key escrow, ect. And it presents a new method for security of bidding information-multiple encrypted simultaneity sealing/unsealing, which provides effective indemnification for bidding information, including integrity, confidentiality and non-repudiation.%针对当前电子招投标括动的安全性需求,提出一种基于身份密码体制(IBC)的电子招投标方案.该方案通过改进IBC的密钥管理体制,解决IBC在电子招投标应用中的私钥分发、密钥托管等问题,并给出一种针对投标信息安全的新方法——多重加密同时封存/开封,有效地保障投标信息的完整性、保密性以及不可抵赖性.
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