Christian Schaffner

I studied mathematics at ETH Zurich (Switzerland) in 2003 and obtained a PhD degree in computer science from Aarhus University (Denmark) in 2007. After being a postdoctoral scholar at CWI Amsterdam and faculty member at the Institute for Logic, Language and Computation (ILLC) at the University of Amsterdam, I now am full professor in Theoretical Computer Science and group leader of the Theory of Computer Science (TCS) group at the Informatics Institute at University of Amsterdam. Iโ€™m an active member of the TCS community in Amsterdam, and senior researcher at QuSoft, the Dutch research center for quantum software.

I carry out research in quantum cryptography, both on non-quantum cryptography that remains secure against quantum attackers (also known as post-quantum cryptography) and on the design of protocols that solve cryptographic problems involving quantum data and quantum communication.

Since 2014, I am teaching a yearly master course on Shannon Information Theory at University of Amsterdam.

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Nuggets of Shannon Information Theory
Christian Schaffner

In his 1948 scientific article entitled "A mathematical theory of communication", Claude E. Shannon introduced the word โ€œbitโ€. The article laid down the foundations for the field of information theory which in turn opened up the way to digital information processing.

In this overview talk, I will present in an accessible way three nuggets from Shannon information theory:
1. Shannon entropy, a mathematical quantification of uncertainty of a probability distribution.
2. Information Compression: Shannon entropy provides a fundamental lower bound on how much information from a source can be compressed so that it can later be recovered.
3. Error correction: when digital information is transmitted over a noisy channel, the methods of error-correction provide ways to protect this information from noise. Yet again, Shannon entropy provides the fundamental quantity of how much information can be transmitted over a noisy channel.

While the content of this talk is of mathematical nature, I will try my best to make it accessible to anybody with (very) basic knowledge of probabilities and programming.

MCH2022 Curated content
Battery ๐Ÿ”‹