Asymptotic converse bound for secret key capacity in hidden Markov model

Shoja, Mohammad Reza Khalili; Amariucai, George T.; Wang, Zhengdao; Wei, Shuangqing; Deng, Jing

doi:10.1109/isit.2017.8006873

Cited by 4 publications

(1 citation statement)

References 10 publications

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“…securely shared with the help of certificates issued by trusted authorities), key-distribution centers (with which each of the parties is assumed to already share a secret key), privileged communication channels (like out-of-band channels [13], or superior wireless channels [3,19]) or sources of common randomness [1,4,12] (like the signal received from a satellite [12] or network metadata [8,16]).…”

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confidence: 99%

An Algebraic Quality-Time-Advantage-Based Key Establishment Protocol

Amariucai

Barman

Guan

2018

Proceedings of the 11th ACM Conference on Security &Amp; Privacy in Wireless and Mobile Networks

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The essence of information assurance resides in the ability to establish secret keys between the legitimate communicating parties. Common approaches to key establishment include public-key infrastructure, key-distribution centers, physical-layer security, or key extraction from common randomness. Of these, the latter two are based on specific natural advantages that the legitimate parties hold over their adversaries-most often, such advantages rely on superior or privileged communication channels. This paper tackles a key-establishment protocol that relies on a completely different type of advantage: time. The protocol builds on the idea that when two devices are able to spend a predetermined , mostly uninterrupted, interval of time in the company of each other, and when such a feat is outside the capability of any realistic attacker, then the legitimate parties should be able to establish a secret key without any prior common information. The paper presents a basic efficient time-based key establishment protocol, and demonstrates how it can be extended to follow customized information transfer functions and deal with predictable fluctuations of wireless interference.

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