An Introduction to Information Security and Cryptography

Mr Soichi Furuya (Centre for Communications Systems Research, University of Cambridge; Hitachi European Integrated Centre for Information and Communications)

Saturday, 12 December, 1998; 7:00-9:00pm

Seminar room, Darwin College

The Internet developed in 1969, based on the connection of ARPANET, has been successfully popularized since the latter half of 1990's, and it is predicted that there will be about one billion users of the Internet by the year 2000. As the needs of the Internet grew, people began to consider a major problem that most networks connected to the Internet cannot support highly reliable security on those data transferred, and now the matter of information security in transaction on the Internet is receiving more attention than ever.
Cryptography has been studied since 1970's as an effective solution to problems on information security. This keen interest led to the disclosure of public-key cryptography, which is recognized as the greatest invention in the contemporary cryptography. It also brought many other progresses to cryptography in 1990's, such as strong cryptanalyses against secret-key cryptography, and a new method for encryption.
In this talk, we discuss the needs of information security incurred by the popularization of networks, demonstrating problems which actually occur. We also concern ourselves with solutions which cryptographic technologies can offer, and with further problems which occur when cryptographic technologies are applied.