Josef Pieprzyk (born 1949 in Poland) is currently a professor at Queensland University of Technology in Brisbane, Australia. He has worked on cryptography, in particular the XSL attack. He collaborated in the invention of the LOKI and LOKI97 block ciphers and the HAVAL cryptographic hash function. External links Home page 1949 births Living people Modern cryptographers 20th-century Polish mathematicians 21st-century Polish mathematicians Macquarie University faculty Queensland University of Technology faculty