Practical distributed secret key generation for delay tolerant networks
Practical distributed secret key generation for delay tolerant networks
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DOI：
10.1002/cpe.2885
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发表时间：
2013-09
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通讯作者：
Yongming Xie;Guojun Wang
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文献类型：
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作者：
Yongming Xie;Guojun Wang
延迟容忍网络 (DTN) 是资源受限的动态网络，其中连续的端到端连接并不总是可用。在这样一个具有挑战性的网络中，当DTN分区或网络中的消息延迟较大时，固定基础设施可能无法连接。因此，传统的公钥基础设施系统和基于身份的加密（IBE）系统不适合DTN，因为它们依赖于集中式基础设施并且需要多次往返交互。为了解决这个问题，我们提出了一种具有自认证身份的分布式密钥生成系统（SCI-DKG），不需要任何私钥生成器和阈值密码系统。最初，每个节点都会生成一个私钥，并向 DTN 中的成员分发包含自认证身份和秘密共享的初始消息。接收方独立地验证身份，并从该初始消息中提取与该身份相对应的一些加密参数。我们证明SCI-DKG在标准模型中选择的密文是安全的，并且它可以抵抗潜在的网络攻击。仿真结果表明，与 DTN 中实现的 IBE 和分层 IBE 系统相比，SCI-DKG 具有更小的延迟和更高的密钥生成成功率。版权所有 © 2012 约翰·威利父子有限公司
Delay tolerant networks (DTNs) are resource‐constrained dynamic networks where a continuous end‐to‐end connectivity is not always available. In such a challenging network, a fixed infrastructure may not be connected when a DTN is partitioned or the message delay in the network is large. Thus, the traditional public key infrastructure system and identity‐based encryption (IBE) system are not suitable for DTNs because they rely on centralized infrastructures and require multiple round‐trip interactions. To address this issue, we propose a distributed secret key generation system with self‐certified identity (SCI‐DKG) that does not require any private key generator and threshold cryptosystem. Initially, each node generates a private key and distributes an initial message including a self‐certified identity and secret sharings to members in a DTN. Receivers independently authenticate the identity and extracts some encryption parameters corresponding to the identity from this initial message. We prove that SCI‐DKG is chosen ciphertext secure in the standard model, and it can resist potential network attacks. Simulation results show that SCI‐DKG has smaller delay and higher successful ratio of secret key generation compared with IBE and hierarchical IBE systems implemented in a DTN. Copyright © 2012 John Wiley & Sons, Ltd.