Cryptography: an overview of its development, status quo and future


Daniel Tanios


UNSW Sydney


Fri, 15/11/2019 - 12:00pm to 1:00pm


RC-4082, The Red Centre, UNSW


The advent of information systems and their subsequent ubiquity have made cryptography an important field and an active area of research. New technological and computational challenges to cryptography necessitate a continual critical assessment of established techniques and an appraisal of novel approaches. This provides a natural and interesting context to frame an overview of cryptography.

This talk will begin with the information theory that underpins cryptography, culminating in an exposition of information-theoretic encryption methods and their failure to provide practical encryption. Subsequently, an attenuated notion of security dominates the development of cryptography, leading to the diversity of modern approaches. We give a brief overview of the two main approaches that overwhelmingly govern state-of-the-art encryption methods today, symmetric and public key encryption, and outline their respective deficiencies. We then shift focus to novel methods not known to be vulnerable to any quantum algorithm and have shown promise in the literature. Finally, quantum cryptography is introduced and special attention is paid to its potential to make information-theoretic security attainable and practical.

School Seminar Series: