An adaptive and robust secret key extraction scheme from high noise wireless channel in IIoT

The Sixth-Generation(6G)enhances the Industrial Internet of Things(IIoT)communication efficiency and further raises security requirements.It is crucial to construct a post-quantum security communication channel between any pair of industrial equipment.Recent work shows that two legitimate devices can directly extract symmetrical secret keys in information-theoretic secure by measuring their common wireless channels.However,existing schemes may cause a high bit mismatch rate in IIoT with high noise.In addition,the physical layer key extraction scheme widely uses passive attack assumptions,which also contradicts the high-security requirements of IIoT.By analyzing and modeling IIoT systems and channels,we propose an Adaptive and Robust Secret Key Extraction scheme(ARSKE)from high noise wireless channels in 6G-enabled IIoT.To eliminate the non-reciprocity of the wireless channel,we design a smoothing method as the preprocessing module.Then,we propose a Robust Secure Reconciliation technique that can effectively resist active attacks by jointly designing the information reconciliation and privacy amplification phases.Extensive real-world experiments are conducted to test the effectiveness and robustness of our scheme.

Particle flux characteristics of a compact high-field cascaded arc plasma device

A new compact cascaded arc device for plasma-wall interaction study is developed at the Institute of Plasma Physics,Chinese Academy of Sciences.A magnetic field up to 0.8 T is achieved to confine plasmas in a 1.2 m long and 0.1 m diameter vacuum chamber.Gas fluid type analysis in this compact vacuum system was done under high particle flux condition.The gas pressure obtained by calculation was consistent with the measurement result.Continuous argon plasma discharge with ion flux of~0.5×10^(24)m^(-2)s^(-1)is successfully sustained for more than 1h.The effects of magnetic field configuration,gas flow rate,and discharge arc current on the ion flux to target were studied in detail.

Conserved noncoding sequences correlate with distant gene contacts in Arabidopsis and Brassica

Physical contact between genes distant on chromosomes is a potentially important way for genes to coordinate their expressions.To investigate the potential importance of distant contacts,we performed high-throughput chromatin conformation capture(Hi-C)experiments on leaf nuclei isolated from Brassica rapa and Brassica oleracea.We then combined our results with published Hi-C data from Arabidopsis thaliana.We found that distant genes come into physical contact and do so preferentially between the proximal promoter of one gene and the downstream region of another gene.Genes with higher numbers of conserved noncoding sequences(CNSs)nearby were more likely to have contact with distant genes.With more CNSs came higher numbers of transcription factor binding sites and more histone modifications associated with the activity.In addition,for the genes we studied,distant contacting genes with CNSs were more likely to be transcriptionally coordinated.These observations suggest that CNSs may enrich active histone modifications and recruit transcription factors,correlating with distant contacts to ensure coordinated expression.This study advances our knowledge of gene contacts and provides insights into the relationship between CNSs and distant gene contacts in plants.