Josef Pieprzyk (born 1949 in Poland) is currently a professor at

Queensland University of Technology The Queensland University of Technology (QUT) is a public university, public research university located in the city of Brisbane in Queensland, Australia. It has two major campuses, a modern city campus in Gardens Point, Brisbane, Gardens Point ...

Brisbane Brisbane ( ; ) is the List of Australian capital cities, capital and largest city of the States and territories of Australia, state of Queensland and the list of cities in Australia by population, third-most populous city in Australia, with a ...

Australia Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ...

. He has worked on

cryptography Cryptography, or cryptology (from "hidden, secret"; and ''graphein'', "to write", or ''-logy, -logia'', "study", respectively), is the practice and study of techniques for secure communication in the presence of Adversary (cryptography), ...

, in particular the XSL attack. He collaborated in the invention of the

LOKI Loki is a Æsir, god in Norse mythology. He is the son of Fárbauti (a jötunn) and Laufey (mythology), Laufey (a goddess), and the brother of Helblindi and Býleistr. Loki is married to the goddess Sigyn and they have two sons, Narfi (son of Lo ...

and LOKI97

block cipher In cryptography, a block cipher is a deterministic algorithm that operates on fixed-length groups of bits, called ''blocks''. Block ciphers are the elementary building blocks of many cryptographic protocols. They are ubiquitous in the storage a ...

s and the HAVAL

cryptographic hash function A cryptographic hash function (CHF) is a hash algorithm (a map (mathematics), map of an arbitrary binary string to a binary string with a fixed size of n bits) that has special properties desirable for a cryptography, cryptographic application: ...

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1949 births Living people Modern cryptographers 20th-century Polish mathematicians 21st-century Polish mathematicians Academic staff of Macquarie University Academic staff of Queensland University of Technology {{Poland-mathematician-stub