An Identity-Based Key-Insulated Encryption with Message Linkages for Peer-to-Peer Communication Network
An Identity-Based Key-Insulated Encryption with Message Linkages for Peer-to-Peer Communication Network
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DOI：
10.3837/tiis.2013.11.022
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发表时间：
2013-11
期刊：
影响因子：
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通讯作者：
Chien-Lung Hsu;Han-Yu Lin
中科院分区：
文献类型：
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作者：
Chien-Lung Hsu;Han-Yu Lin
密钥泄露是密码系统安全的主要威胁。为了减轻密钥泄露攻击造成的影响，密钥隔离加密机制是一个更好的选择。针对对等网络中大消息通信的安全问题，提出了第一个新的基于身份的消息链接密钥隔离加密（IB-KIE）方案。我们的方案具有无限的时间周期和随机访问密钥更新的属性。在该方案中，每个客户可以定期更新其私钥，而相应的公钥保持不变。我们提出的方案的基本安全性假设是基于著名的双线性Diffie-Hellman问题（BDHP）。为了保证方案的实际可行性，在随机预言机模型下，形式化地证明了该方案满足自适应选择密文攻击（IND-CCA 2）下的机密性和不可否认性的安全要求.
Key exposure is a major threat to secure cryptosystems. To mitigate the impact caused by key-compromise attacks, a key-insulated cryptographic mechanism is a better alternative. For securing the large message communication in peer-to-peer networks, in this paper, we propose the first novel identity-based key-insulated encryption (IB-KIE) scheme with message linkages. Our scheme has the properties of unbounded time periods and random-access key-updates. In the proposed scheme, each client can periodically update his private key while the corresponding public one remains unchanged. The essential security assumption of our proposed scheme is based on the well-known bilinear Diffie-Hellman problem (BDHP). To ensure the practical feasibility, we also formally prove that the proposed scheme achieves the security requirement of confidentiality against indistinguishability under adaptive chosen-ciphertext attacks (IND-CCA2) in the random oracle model.