Exploiting Multiple-Antenna Diversity for Shared Secret Key Generation in Wireless Networks

Zeng, Kai; Wu, Daniel; Chan, An; Mohapatra, Prasant

doi:10.1109/infcom.2010.5462004

Cited by 197 publications

(154 citation statements)

References 18 publications

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“…The same information is reconciled and privacy amplification approaches are employed. Note that, theoretically, the bit length of the resulting quantization should be bounded by the mutual information between Alice and Bob [33]. In other words, the quantization level 2 should not be higher than the secret key capacity, that is, 2 ≤ 2 .…”

Section: The Secret Key Generationmentioning

confidence: 99%

Efficient Physical-Layer Secret Key Generation and Authentication Schemes Based on Wireless Channel-Phase

Cheng

Zhou

Seet

et al. 2017

Mobile Information Systems

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Exploiting the inherent physical properties of wireless channels to complement or enhance the traditional security mechanisms has attracted prominent attention recently. However, the existing secret key generation schemes suffer from miscellaneous extracting procedure. Many PHY-layer authentication schemes assume that the knowledge of the shared key is preknown. In this paper, we propose PHY-layer secret key generation and authentication schemes for orthogonal frequency-division multiplexing (OFDM) systems. In the secret key generation scheme, to simplify the extracting procedure, only one legitimate party is chosen to probe the channel and quantize the measurements to obtain the preliminary key. The preliminary key is masked by the channel-phase after the mapping and before equalization and distributed to the other party. The final shared key is used for the PHY-layer authentication scheme in which random signals and the shared key masked by the channel-phase are exchanged at the PHY-layer. Then, a binary hypothesis test is formulated for authentication. Simulation results show that the proposed secret key generation scheme outperforms the existing schemes. For the PHY-layer authentication scheme, it is immune to various passive and active attacks and a high successful authentication rate is acquired even at low signal-to-noise ratio region.

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Section: The Secret Key Generationmentioning

confidence: 99%

Efficient Physical-Layer Secret Key Generation and Authentication Schemes Based on Wireless Channel-Phase

Cheng

Zhou

Seet

et al. 2017

Mobile Information Systems

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“…Many researchers have proposed methods for establishing a secret key based on quantizing different aspects of the channel coefficients, such as the magnitude, phase, or both [9]- [11]. Recent works have included some techniques for multiple-input multipleoutput (MIMO) systems with increased secret key length and lower key bits disagreement which is commonly known as the key error rate (KER), [12]- [14]. Moreover, in [15], secret bits are generated using a probabilistic channel quantization approach (CQA) of the real and imaginary parts with channel decorrelation process to generate independent sequential quantized values.…”

Section: A Related Workmentioning

confidence: 99%

Secret Key Exchange Using Private Random Precoding in MIMO FDD and TDD Systems

Taha

Alsusa

2017

IEEE Trans. Veh. Technol.

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Abstract-Along with the ongoing evolution of multiple antennas communication systems, new physical layer security techniques are continuing to achieve higher levels of secrecy. Most physical layer approaches, however, concern time division duplex (TDD) channels which rely on using the channel reciprocity feature as a shared randomness, and tend to be associated with a large computational burden. In this paper, we propose a new physical layer method which utilizes private random precoding for exchanging the secret key bits in multiple-input multipleoutput (MIMO) systems. The principle of this method is to exploit the precoding matrix index (PMI) in a manner that produces low correlation at the adversary. A robust key exchange between the transmitter and the receiver is established by uniquely relating the secret key bits to the channel precoding matrix using a private version of the universal codebooks. What's more is that the proposed method is applicable in, both, frequency division duplex (FDD) and TDD channels. The results demonstrate that the proposed method can offer superior performance in terms of the key agreement, secrecy level and computational load.Index Terms-FDD, MIMO precoding, physical layer security, TDD, secret key exchange.

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“…KGR describes the amount of key bits generated per time unit, and KDR denotes bit disagreement rates of the generated keys shared by legitimate nodes. In [9], [13] multiple nodes or multiple antennas at each node are exploited in order to create multiple usable common channels from which more key bits can be extracted within one channel coherence time period. Similarly, multiple independent or quasi-independent channels can be generated using frequency resources, such as channel hopping in [14], and OFDM signals in [12].…”

Section: Introductionmentioning

confidence: 99%