Boulat Bash

Interests

Research

Applying quantum and classical information theory to practical problems of reliability and security; developing fundamental limits for communicating and sensing with signals that are mathematically secure, and pushing towards these limits by engineering experimental and prototype radio and optical systems; employing information-theoretic approaches to securing biomechanical and very large distributed computing systems

Teaching

Wireless network security, information theory, communications

Courses

Scholarly Contributions

Journals/Publications

• Shapiro, J. H., He, W., Guha, S., & Bash, B. A. (2021). Performance analysis of free-space quantum key distribution using multiple spatial modes.. Optics express, 29(13), 19305-19318. doi:10.1364/oe.426556
  More info

  In the diffraction-limited near-field propagation regime, free-space optical quantum key distribution (QKD) systems can employ multiple spatial modes to improve their key rate. This improvement can be effected by means of high-dimensional QKD or by spatial-mode multiplexing of independent QKD channels, with the latter, in general, offering higher key rates. Here, we theoretically analyze spatial-mode-multiplexed, decoy-state BB84 whose transmitter mode set is either a collection of phase-tilted, flat-top focused beams (FBs) or the Laguerre-Gaussian (LG) modes. Although for vacuum propagation the FBs suffer a QKD rate penalty relative to the LG modes, their potential ease of implementation make them an attractive alternative. Moreover, in the presence of turbulence, the FB modes may outperform the LG modes.
• Bullock, M., Gagastos, C. N., & Bash, B. A. (2020). Covert Capacity of Bosonic Channels. IEEE Journal on Selected Areas in Information Theory, 1, 555-567.
• Bullock, M., Gagastos, C. N., Guha, S., & Bash, B. A. (2020). Fundamental limits of quantum-secure covert communication over bosonic channels. IEEE Journal on Selected Areas in Communications, 38, 471-483.
• Gagatsos, C. N., Bash, B. A., Datta, A., Zhang, Z., & Guha, S. (2019). Covert sensing using floodlight illumination. Phys. Rev. A, 99, 062321.
• Sheikholeslami, A., Ghaderi, M., Towsley, D., Bash, B. A., Guha, S., & Goeckel, D. (2018). Multi-Hop Routing in Covert Wireless Networks. IEEE Trans. Wireless Commun., 17(6), 3656--3669.
• Soltani, R., Goeckel, D., Towsley, D., Bash, B. A., & Guha, S. (2018). Covert Wireless Communication with Artificial Noise Generation. IEEE Trans. Wireless Commun., 17(11), 7252--7267.
• Sobers, T. V., Bash, B. A., Guha, S., Towsley, D., & Goeckel, D. (2017). Covert Communication in the Presence of an Uninformed Jammer. IEEE Trans. Wireless Commun., 16(9), 6193--6206.
• Bash, B. A., Goeckel, D., & Towsley, D. (2016). Covert Communication Gains From Adversary's Ignorance of Transmission Time. IEEE Trans. Wireless Commun., 15(12), 8394--8405.
• Goeckel, D., Bash, B. A., Guha, S., & Towsley, D. (2016). Covert Communications when the Warden Does Not Know the Background Noise Power. IEEE Commun. Lett., 20(2), 236--239.
• Bash, B. A., Gheorghe, A. H., Patel, M., Habif, J. L., Goeckel, D., Towsley, D., & Guha, S. (2015). Quantum-secure covert communication on bosonic channels. Nat. Commun., 6.
• Bash, B. A., Goeckel, D., Guha, S., & Towsley, D. (2015). Hiding Information in Noise: Fundamental Limits of Covert Wireless Communication. IEEE Commun. Mag., 53(12).
• Bash, B. A., Goeckel, D., & Towsley, D. (2013). Asymptotic Optimality of Equal Power Allocation for Linear Estimation of WSS Random Processes. IEEE Wireless Communications Letters, 2(3), 247-250.
• Bash, B. A., Goeckel, D., & Towsley, D. (2013). Limits of Reliable Communication with Low Probability of Detection on AWGN Channels. IEEE J. Select. Areas Commun., 31(9), 1921--1930.

Proceedings Publications

• Bullock, M., Gagastos, C. N., & Bash, B. A. (2020, September). Entanglement-Assisted Quantum-Secure Covert Communication. In OSA Quantum 2.0 Conference.
• Guha, S., Zhuang, Q., & Bash, B. A. (2020, June). Infinite-fold enhancement in communications capacity using pre-shared entanglement. In IEEE International Symposium on Information Theory (ISIT) 2020.
• Ahmed, S., & Bash, B. A. (2019, sep). Average Worst-Case Secrecy Rate Maximization Via UAV and Base Station Resource Allocation. In Proc. Conf. Commun. Control Comp. (Allerton).
• Bash, B. A., Gagatsos, C., & Guha, S. (2019, jun). Fundamental limits of discrete-modulation quantum-secure covert optical communication. In Proc. Central Eur. Workshop Quantum Opt. (CEWQO).
• Bullock, M. S., Gagatsos, C. N., Guha, S., & Bash, B. A. (2019, sep). Fundamental limits of quantum-secure covert communication over bosonic channels. In Proc. Conf. Commun. Control Comp. (Allerton).
• Gagatsos, C. N., Bash, B. A., Datta, A., Zhang, Z., & Guha, S. (2019, may). Covert sensing using floodlight illumination. In Proc. Conf. Lasers Electro-Opt. (CLEO).
• Goeckel, D., Sheikholeslami, A., Sobers, T., Bash, B. A., Towsley, D., & Guha, S. (2018, jun). Covert Communications in a Dynamic Interference Environment. In Proc. IEEE Int. Workshop Signal Process. Advances Wireless Commun. (SPAWC).
• Bash, B. A., Gagatsos, C. N., Datta, A., & Guha, S. (2017, jun). Fundamental limits of quantum-secure covert optical sensing. In Proc. IEEE Int.~Symp.~Inform.~Theory (ISIT).
• Sobers, T. V., Bash, B. A., Guha, S., Towsley, D., & Goeckel, D. (2017, nov). Covert Communications on Continuous-Time Channels in the Presence of Jamming. In Asilomar Conf. Signals Syst. Comput..
• Sheikholeslami, A., Bash, B. A., Towsley, D., Goeckel, D., & Guha, S. (2016, jul). Covert Communication over Classical-Quantum Channels. In Proc. IEEE Int. Symp. Inform. Theory (ISIT).
• Sobers, T. V., Bash, B. A., Goeckel, D., Guha, S., & Towsley, D. (2015, nov). Covert communication with the help of an uninformed jammer achieves positive rate. In Asilomar Conf. Signals Syst. Comput..
• Bash, B. A., Goeckel, D., & Towsley, D. (2014, jul). LPD Communication when the Warden Does Not Know When. In Proc. IEEE Int.~Symp.~Inform.~Theory (ISIT).
• Soltani, R., Bash, B. A., Goeckel, D., Guha, S., & Towsley, D. (2014, oct). Covert Single-hop Communication in a Wireless Network with Distributed Artificial Noise Generation. In Proc. Conf. Commun. Control Comp. (Allerton).
• Bash, B. A., Guha, S., Goeckel, D., & Towsley, D. (2013, jul). Quantum Noise Limited Communication with Low Probability of Detection. In Proc. IEEE Int. Symp. Inform. Theory (ISIT).
• Bash, B. A., Goeckel, D., & Towsley, D. (2012, jul). Square Root Law for Communication with Low Probability of Detection on AWGN Channels. In Proc. IEEE Int. Symp. Inform. Theory (ISIT).
• Bash, B. A., Goeckel, D., & Towsley, D. (2011, apr). Clustering in Cooperative Networks. In Proc. IEEE Int. Conf. Comput. Commun. (INFOCOM) Mini-conference.
• Bash, B. A. (2009, apr). Informed Detour Selection Helps Reliability. In Proc. IEEE Global Internet Symp. (GIS).
• Bash, B. A., & Desnoyers, P. J. (2007). Exact Distributed Voronoi Cell Computation in Sensor Networks. In Proc. ACM Int. Confi. Inform. Process. Sensor Networks (IPSN).
• Bash, B. A., Byers, J. W., & Considine, J. (2004, aug). Uniform Random Sampling in Sensor Networks. In Proc. Int. Workshop Data Manage. Sensor Networks (DMSN).