A Private Key Sharing Scheme Based on Multipath Time Delay in UWB Systems

Kitaura, Akito; Sumi, Tetsuya; Tango, Toshihiro; Iwai, Hisato; Sasaoka, Hideichi

doi:10.1109/icct.2006.341996

Cited by 12 publications

(5 citation statements)

References 4 publications

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“…The channel fluctuations are created artificially by an electronic steerable parasitic antenna (ESPAR). In [6], the authors show that it is possible to extract secret keys based on the measurements of arrival time difference at both authorised users. However, this solution requires a specific antenna like in [3], [5], [8], [7] and an overhead bandwidth for the exchange phase to generate secret key.…”

Section: Related Workmentioning

confidence: 99%

“…The first bits extraction is based on fixed threshold which is set by A and B like in [3], [6], [5]. The principle of this algorithm is as follows: A and B compare the estimated received signal to the shared threshold, if the amplitude of the i th sample is below the threshold L the bit is set to 0 else it is set to 1.…”

Section: Studying the Impact Of Quantization Phasementioning

confidence: 99%

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An Adaptive Quantization Algorithm for Secret Key Generation Using Radio Channel Measurements

Hamida

Pierrot

Castelluccia

2009

2009 3rd International Conference on New Technologies, Mobility and Security

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Abstract-New approaches that generate secret keys from radio channel characteristics have been recently proposed. The security of these schemes usually relies on the reciprocity principle which states that the channel fluctuations can be a source of common randomness for two communicating peers and these fluctuations can't be measured by any eavesdropper. A validation of these properties for indoor environments is presented in this work. The shared keys are created by measuring the reciprocal channel features and converting this information to binary vectors using a quantization algorithm. This paper addresses the problem of quantization. It identifies an important weakness of existing key generation algorithms and it shows that the secret bits extraction has a significant impact on the robustness and security of these algorithms. A new adaptive quantization algorithm for secret key generation is presented. This method has the advantages to create sufficient long secret keys with a high key agreement ratio between authorized users without revealing information to the attacker. The new scheme is experimentally validated using Ultra Wide Band technology.

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Section: Related Workmentioning

confidence: 99%

Section: Studying the Impact Of Quantization Phasementioning

confidence: 99%

An Adaptive Quantization Algorithm for Secret Key Generation Using Radio Channel Measurements

Hamida

Pierrot

Castelluccia

2009

2009 3rd International Conference on New Technologies, Mobility and Security

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“…There are other types of CSI characteristics used for secret key generation, such as the arrival time differences of multipath components at receivers [7], or index of a reliably decoded layer for layered broadcast coded communication system [18]. This is not an exhaustive list of channel characteristics, but illustrates that different approaches are required to conduct side-channel analysis attacks during the CSI estimation.…”

Section: A Attacks During Csi Estimation and Key Bit Quantizationmentioning

confidence: 98%

“…In [3]- [4], secret keys are generated from the received signal strength indicator (RSSI) profile, extra randomness is added in with the help of an electronic steerable parasitic antenna (ESPAR). In [7], the secret keys are generated based on the arrival time difference measurements of multipath components at both legitimate users. It is shown in [8] that the secret key agreement can be ensured with the help of low-density parity-check (LDPC) codes.…”

Section: Introductionmentioning

confidence: 99%

Side channel analysis attacks against channel state information based key generation

Xiong

2012

2012 International Conference on Systems and Informatics (ICSAI2012)

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The recent research on randomness of wireless channels shows that the channel state information (CSI) can be harnessed to generate secret keys for wireless communications. This CSI-based key generation claims to be secure due to the spatial independence between the legitimate channel and the eavesdropping channel. However, this paper presents the discovery that the side-channel information about the security key may leak from the electronic instruments when they are measuring the CSI, when the instruments are encrypting/decrypting for key confirmation, or even when the device is communicating with the established key. Through analyzing the side-channel information, the secret keys can be extracted. The side-channel information could be obtained without approaching the legitimate transceiver, thus posing a serious threat to the CSI-based key generation.Index Terms-Channel state information (CSI), secret key, side-channel analysis.

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“…In [4]- [5], secret keys are generated through exploiting the received signal strength indicator (RSSI) profile, using an electronically steerable parasitic antenna (ESPAR). In [8], the authors show that it is possible to extract secret keys based on the arrival time difference measurements of multipath components at both legitimate users. It is shown in [9], [10] that the secret key agreement can be ensured with the help of low-density paritycheck (LDPC) codes.…”

Section: Introductionmentioning

confidence: 99%

Threat on Physical Layer Security: Side Channel vs. Wiretap Channel

Luo

et al. 2013

2013 IEEE 16th International Conference on Computational Science and Engineering

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The location-specific channel state information can be exploited to generate secret keys for wireless system services, In the multipath wireless environment. Its secrecy capacity was usually studied with the wiretap channel model. This paper proposes a side channel model which is even more threatening to the security of the physical layer randomness based secret keys. We present the information-theoretic analysis of the side channel model, and compare it with the wire-tap model. The analysis indicates that the secret key capacity of the side-channel will be lower than that of the wire-tap channel, especially with a fading scenario. We conduct MATLAB simulation of physical layer randomness based key generation and SPICE simulation of key extraction to observe the side channel leakage of the circuit. The simulation results confirm the consistency of the key bits, thus verifying the feasibility of our proposed side-channel attack scheme against the physical layer security.Index Terms-Physical layer security, channel state information (CSI), wiretap channel, side-channel analysis.

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A Private Key Sharing Scheme Based on Multipath Time Delay in UWB Systems

Cited by 12 publications

References 4 publications

An Adaptive Quantization Algorithm for Secret Key Generation Using Radio Channel Measurements

An Adaptive Quantization Algorithm for Secret Key Generation Using Radio Channel Measurements

Side channel analysis attacks against channel state information based key generation

Threat on Physical Layer Security: Side Channel vs. Wiretap Channel

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