Wireless secret key generation exploiting reactance-domain scalar response of multipath fading channels

Aono, Tomoyuki; Higuchi, Kenichi; Ohira, Takashi; Komiyama, Bokuji; Sasaoka, Hideichi

doi:10.1109/tap.2005.858853

Cited by 275 publications

(174 citation statements)

References 15 publications

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“…In [5], it was shown that is possible to generate secret keys using the Bit Error Rates (BER) statistics. In [3], [7], [8], secret keys are generated exploiting the received signal strength indicator (RSSI) profile. The channel fluctuations are created artificially by an electronic steerable parasitic antenna (ESPAR).…”

Section: Related Workmentioning

confidence: 99%

“…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. It is shown in [10], that the secret key agreement can be ensured when the transceivers use LDPC decoders to resolve the differences between the reciprocal channel estimations.…”

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: Related Workmentioning

confidence: 99%

Section: Studying the Impact Of Quantization Phasementioning

confidence: 99%

See 1 more Smart Citation

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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“…In [10], threshold magnitude carrier variations in time and frequency are measured. In [11] and [12], threshold magnitude-only signal-strength variation is measured in time with pseudorandom variation added via switched parasitic antenna elements [13], [17]. In [14], an ultra-wideband pulse is used to measure the channel impulse response in time.…”

Section: Related Workmentioning

confidence: 99%

The generation of shared cryptographic keys through channel impulse response estimation at 60 GHz.

Young

Forman

Dowdle³

2010

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Methods to generate private keys based on wireless channel characteristics have been proposed as an alternative to standard key-management schemes. In this work, we discuss past work in the field and offer a generalized scheme for the generation of private keys using uncorrelated channels in multiple domains. Proposed cognitive enhancements measure channel characteristics, to dynamically change transmission and reception parameters as well as estimate private key randomness and expiration times.Finally, results are presented on the implementation of a system for the generation of private keys for cryptographic communications using channel impulse-response estimation at 60 GHz. The testbed is composed of commercial millimeter-wave VubIQ transceivers, laboratory equipment, and software implemented in MATLAB. Novel cognitive enhancements are demonstrated, using channel estimation to dynamically change system parameters and estimate cryptographic key strength. We show for a complex channel that secret key generation can be accomplished on the order of 100 kb/s.3 Acknowledgment

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“…In recent years there has been a significant interest in developing secret-key agreement protocols over fading channels, see e.g., [1]- [7] and the references therein. In time-division duplex (TDD) wireless systems, a natural reciprocity between uplink and downlink exists, which is clearly a valuable resource for generating a shared secret key.…”

Section: Introductionmentioning

confidence: 99%

A remark on secret-key generation over correlated fading channels

Khisti

Diggavi²

2011

2011 IEEE GLOBECOM Workshops (GC Wkshps)

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Abstract-We study secret-key agreement with public discussion over a flat-fading wiretap channel model. The fading gains are correlated across the receivers and sampled independently at each time. Perfect receiver channel state information (CSI) is assumed, whereas a noisy CSI of the main channel is also available to the transmitter. We propose lower and upper bounds on the capacity. Our lower bound is achieved by a coding scheme that involves a separate binning of the receiver CSI sequence and its channel output sequence. In general it improves upon the joint-binning schemes considered in earlier works. Our upper and lower bounds coincide, establishing the capacity, when either the transmitter has no CSI or when the channel gains of the legitimate receiver and the eavesdropper are statistically independent.

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Wireless secret key generation exploiting reactance-domain scalar response of multipath fading channels

Cited by 275 publications

References 15 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

The generation of shared cryptographic keys through channel impulse response estimation at 60 GHz.

A remark on secret-key generation over correlated fading channels

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