{"614318":{"#nid":"614318","#data":{"type":"event","title":"Ph.D. Proposal Oral Exam - Mehrdad Tahmasbi","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003ETitle:\u0026nbsp; \u003C\/strong\u003E\u003Cem\u003ECovertness and Learning in Information-Theoretic Security\u003C\/em\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee:\u0026nbsp; \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Bloch, Advisor\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Barry, Chair\u003C\/p\u003E\r\n\r\n\u003Cp\u003EDr. Romberg\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract: \u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe objective of the proposed research is to study covert communications and the possibility of learning in the context of information-theoretic security. We first establish results pertaining to the refined asymptotics of covert communications under three different metrics to measure covertness of a communication: Kullback-Leibler divergence and variational distance between the probability distributions induced without and with communication, as well as the optimal probability of missed detection at a fixed probability of false alarm. We also study the fundamental limits of covert secret key generation, in which two parties attempt to generate a secret key from correlated observations and communications over a public channel without being detected, in the classical and quantum regime. In the context of learning, we propose a new model, in which the transmitter can sense a noisy signal correlated with the adversary\u0026rsquo;s actions. We prove that the achievable rates, defined precisely for the problem, are arbitrarily close to those obtained with hindsight, had the transmitter known the actions ahead of time.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Covertness and Learning in Information-Theoretic Security"}],"uid":"28475","created_gmt":"2018-11-15 21:33:33","changed_gmt":"2018-11-15 21:33:33","author":"Daniela Staiculescu","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2018-11-20T11:00:00-05:00","event_time_end":"2018-11-20T13:00:00-05:00","event_time_end_last":"2018-11-20T13:00:00-05:00","gmt_time_start":"2018-11-20 16:00:00","gmt_time_end":"2018-11-20 18:00:00","gmt_time_end_last":"2018-11-20 18:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"434371","name":"ECE Ph.D. Proposal Oral Exams"}],"categories":[],"keywords":[{"id":"102851","name":"Phd proposal"},{"id":"1808","name":"graduate students"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1788","name":"Other\/Miscellaneous"}],"invited_audience":[{"id":"78771","name":"Public"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}