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arXiv 1702.07429cs.ITmath.IT
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全知秘密密钥协商的最优性

On the Optimality of Secret Key Agreement via Omniscience

Chung Chan, Manuj Mukherjee, Navin Kashyap, Qiaoqiao Zhou

摘要:

对于私有源模型下的多终端秘密密钥协商问题,已知最大密钥速率,即,保密能力可以通过全知通信来实现,但是全知策略在最小化公共讨论率方面可能是严格次优的。虽然一个单字母的表征是不知道的最低讨论率需要实现的保密能力,我们推导出单字母的下限和上限,产生一些简单的条件,全知是讨论率最优。这些条件足以推导出最优的全知的一大类来源,包括超图来源。通过插图和例子,我们探索其他源模型,我们的方法不容易扩展。

英文摘要:

For the multiterminal secret key agreement problem under a private source model, it is known that the maximum key rate, i.e., the secrecy capacity, can be achieved through communication for omniscience, but the omniscience strategy can be strictly suboptimal in terms of minimizing the public discussion rate. While a single-letter characterization is not known for the minimum discussion rate needed for achieving the secrecy capacity, we derive single-letter lower and upper bounds that yield some simple conditions for omniscience to be discussion-rate optimal. These conditions turn out to be enough to deduce the optimality of omniscience for a large class of sources including the hypergraphical sources. Through conjectures and examples, we explore other source models to which our methods do not easily extend.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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