Dear all,
The Department of Physics, faculty of Science invites you to the following Colloquium:
Title: Quantum Cryptography and Eavesdropping on the Universe
Speaker: Jesni Shamsul Shaari, Department of Physics, International Islamic University Malaysia
Date: Friday December 2nd 2022, 3:00 pm
Location: https://meet.google.
Abstract:
Quantum cryptography is field of study for which the central feature is the quest for information security through physical means. Unlike the basic notion of computational security in modern cryptography, quantum cryptography makes use of basic limitations in accessible information in the physical world, which are a matter of principle rather than one limited by technologies. Accessing information in any way possible by an eavesdropper while minimizing disruptions to the communicating parties, in some sense is the essence of the problem statements in quantum cryptographic studies. However, what’s interesting is, in principle, this not very different from what we do in trying to access information about our physical world. Thus the notions of understanding how much information an eavesdropper can learn is analogous to how much we can know of the universe where in principle limitations become the main safety feature in the former, a hurdle in the latter. This basically has engendered or encouraged further studies of entropic uncertainty relations regarding measurement and processes in the physical world.
About the Speaker:
Jesni Shamsul Shaari is currently a Professor in the Dept. of Physics, International Islamic University Malaysia. He mainly works in the field of Quantum Cryptography and Quantum Information, specifically on quantum key distribution schemes making bidirectional use of quantum channels. He was a key person in the development of Malaysia’s first quantum cryptographic protocol, named 6DP, (which was published in the journal Physics Letters A with coauthors Marco Lucamarini and Mohamed Ridza Wahiddin).The protocol itself is a generalisation of an earlier two-way QKD scheme to include all mutually unbiased bases for a qubit (two dimensional quantum system). While later pursuing specific topics in quantum cryptography including higher dimensional two-way QKD, decoy states as well as finite key analysis(for bidirectional QKD) and device independent QKD, Jesni also pursues his interest in more fundamental topics derived from the study of quantum cryptography including issues related to Mutually Unbiased Unitary Bases (a structure analogous to Mutually Unbiased Bases for quantum states) as well as entropic relations in estimating parameters for channels/ operators.
Thank you.
