Lars Ramkilde Knudsen

After some early work in banking, Knudsen enrolled at Aarhus University in 1984 studying mathematics and computer science, gaining an MSc in 1992 and a PhD in 1994. In 1999 he became a professor at the University of Bergen, Norway and in 2001 he became a professor at the Technical University of Denmark (DTU). Ivan Damgård was Lars' mentor during his studies at Aarhus University.^{[citation needed]}

Knudsen has published papers on cryptanalysis of cryptographic primitives, including the R-MAC scheme, the SHA-1 and MD2 hash functions, and a couple of block ciphers: DES, DFC, IDEA, ICE, LOKI, MISTY, RC2, RC5, RC6, SC2000, Skipjack, Square and SAFER.^{[citation needed]}

Knudsen was involved in designing ciphers: AES candidates DEAL, Serpent (the latter in conjunction with Ross Anderson and Eli Biham) and the lightweight cipher PRESENT included in ISO/IEC 29192-2:2019. He was involved in designing Grøstl, a hash function which was one of the submissions to the NIST SHA-3 competition (it was not the winner).^{[citation needed]}

He introduced the technique of impossible differential cryptanalysis^[1] and integral cryptanalysis.

Knudsen is a co-founder of the communications companies Dencrypt A/S and PiiGuard ApS. Knudsen has been an editor for journals such as IEEE Transactions on Information Forensics and Security and Design, Codes and Cryptography. He has also chaired a number of international cryptography conferences, including FSE 1999, Eurocrypt 2002 and SAC 2012.^{[citation needed]}

In August 2021, Knudsen was knighted as Ridder af Dannebrog. He has been a Fellow of the International Association of Cryptologic Research (IACR) since 2013 and a member of the Danish Academy of Technical Sciences (ATV) since 2005.^{[citation needed]}