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首页> 外文会议>International Conference on Information and Communications Security(ICICS 2004); 20041027-29; Malaga(ES) >Secret-Public Storage Trade-Off for Broadcast Encryption Key Management
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Secret-Public Storage Trade-Off for Broadcast Encryption Key Management

机译：广播加密密钥管理的秘密-公共存储权衡

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摘要

The problem of minimizing the amount of secret information (secret bits) required for certain key management schemes is addressed. It is important to note that the secret storage minimization originates from the fact that this storage should be both read-proof and tamper-proof. The proposed minimization of the secret storage at the user's side is based on an appropriate trade-off between the required public storage and the processing complexity. As the main components, two methods are proposed for assigning multiple roles to the same secret key bits, and both of them require only simple operations implying a high implementation efficiency. The first proposed one-way mapping is based on certain sequence comparison issues and the second one follows the model of a communication channel with erasures. Employment of a proposed mapping method in two computationally secure key management schemes for the broadcast encryption SD and LSD is considered and the modified versions of these schemes with minimized secret storage requirements are proposed. The main overheads of the original and the modified SD and LSD based schemes are compared and the advantages of the modified schemes are pointed out. Also, it is shown that the proposed secret to public storage exchange preserves the security of the original SD and LSD schemes.
机译：解决了最小化某些密钥管理方案所需的秘密信息（秘密位）的数量的问题。重要的是要注意，秘密存储空间的最小化源于以下事实：该存储空间应既防读又防篡改。在用户侧建议的秘密存储最小化是基于所需的公共存储和处理复杂性之间的适当折衷。作为主要组成部分，提出了两种用于将多个角色分配给同一秘密密钥位的方法，并且这两种方法仅需要简单的操作即可，这意味着实现效率很高。第一个提出的单向映射基于某些序列比较问题，第二个遵循带擦除的通信信道模型。考虑了在广播加密SD和LSD的两个计算安全密钥管理方案中采用建议的映射方法，并提出了具有最小化秘密存储要求的这些方案的修改版本。比较了原始方案和基于SD和LSD的改进方案的主要开销，并指出了改进方案的优点。此外，还表明，提议的公共存储交换秘密可以保留原始SD和LSD方案的安全性。

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