Physical Layer Security of QSTBC With Power Scaling in MIMO Wiretap Channels

Chae, Seong Ho; Bang, Inkyu; Lee, Hoojin

doi:10.1109/tvt.2020.2978412

Cited by 13 publications

(15 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We estimate the secrecy performance in terms of C s in (27), and Figure 3 compares the simulation results of the average secrecy capacity. For comparative purpose, we implement a number of conventional schemes: (1) the Alamouti scheme [15], (2) the LD-QO-STBC scheme [14], (3) the QO-STBC scheme with power scaling [13], (4) the Alamouti scheme with AN [10], and (5) the proposed scheme. Because we assume that Bob and Eve have perfect CSI of their own and the same SNR, the secrecy capacities of the conventional schemes without any AN or AI, i.e., (1), (2), and (3), are almost zero.…”

Section: Performance Evaluationmentioning

confidence: 99%

Waveform Design for Space–Time Coded MIMO Systems with High Secrecy Protection

2020

View full text Add to dashboard Cite

In this paper, we present a new secrecy-enhancing scheme for multi-input-multi-output (MIMO) systems using a space–time coding scheme. We adopt a quasi-orthogonal space–time block coding (QO-STBC) scheme that was originally designed to improve the performance of the MIMO system, and propose an efficient waveform design that can enhance the secrecy, as well as improve the error rate performance. Channel- and signal-dependent artificial interference (AI) is added to the proposed waveform, so that only a legitimate receiver can successfully retrieve information. We investigate the secrecy capacity of the proposed scheme, and demonstrate that the proposed scheme provides highly enhanced secrecy performance, compared to the conventional schemes. The performance simulation results reveal that the transmitted information can be properly extracted only at the legitimate receiver.

show abstract

Section: Performance Evaluationmentioning

confidence: 99%

Waveform Design for Space–Time Coded MIMO Systems with High Secrecy Protection

2020

View full text Add to dashboard Cite

show abstract

“…as an encryption key used at the transmitter side where b tx k (1 ≤ k ≤ K) denotes a binary number generated from the estimated CSI and K (≤ N M r ) indicates the length of the key. 4 Furthermore, let H = {h 1 , • • • , h K } denote selected K channel coefficients among the channel coefficients over all N M r subcarriers. Then, each bit of w tx is extracted from H using binarization as follows:…”

Section: B Procedures Of the Constellation Mapping Index Sharingmentioning

confidence: 99%

“…The transmitter first applies error-correcting encoding (e.g., convolutional coding) on s using an encoding function f enc (•) and thus it obtains s enc = f enc (s). In particular, s enc 4 wtx is obtained using pilots sent by the receiver before data transmission. For example, a request-to-send/clear-to-send (RTS/CTS) protocol in IEEE 802.11 wireless local area network can be used [23].…”

Section: ) Reliable Transmission Of the Wireless Keymentioning

confidence: 99%

“…The keyless approaches to enhance wireless security in terms of secrecy rate and secrecy outage probability have been intensively investigated in the literature [3]- [6]. Although there have been lots of efforts to apply the information-theoretic security framework to practical net-work environments, several hurdles still remain when applying the previously proposed results to a practical setting (e.g., availability of the eavesdropper's channel information [3] and operational complexity such as beamforming [4], scheduling [5], [6] and relaying). Artificial noise (AN) technique that degrades wireless channel quality at the eavesdropper is one of the keyless approaches to be applicable in practical scenarios since it does not require the eavesdropper's instantaneous channel state information [10].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Secure Modulation Based on Constellation Mapping Obfuscation in OFDM Based TDD Systems

Bang

Kim

2020

IEEE Access

Self Cite

View full text Add to dashboard Cite

In this paper, we propose a secure modulation technique based on constellation mapping obfuscation to harden computational complexity for security at the physical-layer. To obfuscate mapping from bit stream to modulated symbols, our proposed scheme randomly changes a constellation mapping rule at each packet transmission opportunity, instead of employing a pre-determined mapping rule (e.g., Gray-coded mapping) at every packet transmission opportunity. Furthermore, to securely share the mapping rule between the transmitter and the desired receiver, the proposed scheme uses wireless channel based encryption and the fuzzy commitment with an error correction coding. We derive asymptotic bit error rate of the proposed scheme and validate our analysis through extensive simulations. We verify that our proposed scheme can further improve wireless security at the physical-layer irrespective of the upper layers' cryptographic schemes, which can be achieved by computational hardness -M ! computations are required for the eavesdropper to crack the mapping rule when M -quadrature amplitude modulation (QAM) is considered (e.g., 64! ≈ 1.27 × 10 89 combinations for 64-QAM).

show abstract

“…Due to the broadcast nature of wireless channels, wireless multi-user communications are very susceptible to eavesdropping. Traditionally, wireless security is ensured by data cryptography techniques, which mainly depend on secret keys and also rely on the limited computational power of eavesdroppers [1][2][3][4]. However, future wireless systems demand ubiquitous coverage and large-scale deployment of wireless radio devices.…”

Section: Introductionmentioning

confidence: 99%

Secrecy Capacity of Time Reversal Beamforming for Multi-User MIMO System under Spatial Correlation

Sun

et al. 2021

Security and Communication Networks

View full text Add to dashboard Cite

In this paper, for strengthening the security of wireless transmission system, the time reversal (TR) beamforming method is proposed for the downlink of multi-user MIMO system with multiple users who potentially act as eavesdroppers. We develop a multi-input, single-output, multi-eavesdropper (MISOME) wiretap channel model in which Rayleigh fading and spatial correlation are taken into account. Using the proposed model, we further analyze the confidentiality provided by TR beamforming and we use achievable secrecy rates as our performance metrics. In particular, we derive novel closed-formed expressions for the average secrecy-SINR and the mean secrecy sum-rate in order to characterize the influences of propagation conditions on network secrecy metrics. These expressions provide deeper insights into the impact of network interference on communication confidentiality. We find that TR beamforming can deliver the maximum secrecy capacity potential in uncorrelated Rayleigh channels and achieve perfect confidential communication without any extra secrecy cost. On the other hand, even weak inter-user correlation may cause a significant loss of achievable secrecy sum-rate and therefore result in high secrecy cost. But benefiting more from larger signal bandwidth and rich-scattering environment, the TR beamforming technique is still an attractive and cost-effective solution for low-power indoor applications.

show abstract

Physical Layer Security of QSTBC With Power Scaling in MIMO Wiretap Channels

Cited by 13 publications

References 12 publications

Waveform Design for Space–Time Coded MIMO Systems with High Secrecy Protection

Waveform Design for Space–Time Coded MIMO Systems with High Secrecy Protection

Secure Modulation Based on Constellation Mapping Obfuscation in OFDM Based TDD Systems

Secrecy Capacity of Time Reversal Beamforming for Multi-User MIMO System under Spatial Correlation

Contact Info

Product

Resources

About