On-line Entropy Estimation for Secure Information Reconciliation

Zenger, Christian; Zimmer, Jan; Posielek, Jan-Felix; Paar, Christof

doi:10.4108/eai.22-7-2015.2260196

Cited by 8 publications

(2 citation statements)

References 19 publications

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“…These steps are similar to existing works in the field of CRKG and are thus not particularly designed in this paper. We refer the interested reader to [25]- [28].…”

Section: B Process Of Crkgmentioning

confidence: 99%

Reconfigurable Intelligent Surface for Physical Layer Key Generation: Constructive or Destructive?

Staat

et al. 2022

IEEE Wireless Commun.

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Channel Reciprocity-based Key Generation (CRKG) exploits reciprocal channel randomness to establish shared secret keys between wireless terminals. This new security technique is expected to complement existing cryptographic techniques for secret key distribution of future wireless networks. In this paper, we present a new attack, reconfigurable intelligent surface (RIS) jamming, and show that an attacker can prevent legitimate users from agreeing on the same key by deploying a malicious RIS to break channel reciprocity. Specifically, we elaborate on three examples to implement the RIS jamming attack: Using active nonreciprocal circuits, performing time-varying controls, and reducing the signal-to-noise ratio. The attack effect is then studied by formulating the secret key rate with a relationship to the deployment of RIS. To resist such RIS jamming attacks, we propose a countermeasure that exploits wideband signals for multipath separation. The malicious RIS path is distinguished from all separated channel paths, and thus the countermeasure is referred to as contaminated path removal-based CRKG (CRP-CRKG). We present simulation results, showing that legitimate users under RIS jamming are still able to generate secret keys from the remaining paths. We also experimentally demonstrate the RIS jamming attack by using commodity Wi-Fi devices in conjunction with a fabricated RIS prototype. In our experiments, we were able to increase the average bit disagreement ratio (BDR) of raw secret keys by 20%. Further, we successfully demonstrate the proposed CRP-CRKG countermeasure to tackle RIS jamming in wideband systems as long as the source of randomness and the RIS propagation paths are separable.

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“…These steps are similar to existing works in the field of CRKG and are thus not particularly designed in this paper. We refer the interested reader to [25]- [28].…”

Section: B Process Of Crkgmentioning

confidence: 99%

Reconfigurable Intelligent Surface for Physical Layer Key Generation: Constructive or Destructive?

Staat

et al. 2022

IEEE Wireless Commun.

View full text Add to dashboard Cite

show abstract

“…Therefore, we applied the bit-wise on-line entropy estimation based on SP800 − 90B draft by NIST [31] which is designed to work on non-independent and identically distributed (non-IID) random variables. To determine the security level we adopt the design criterias proposed in [32].…”

Section: Accepted Manuscriptmentioning

confidence: 99%