Vincent Rijmen ( [ˈrɛi̯mə(n)]; born 16 October 1970) is a Belgian cryptographer and one of the two designers of the Rijndael, the Advanced Encryption Standard. Rijmen is also the co-designer of the WHIRLPOOL cryptographic hash function, and the block ciphers Anubis, KHAZAD, Square, NOEKEON and SHARK.
In 1993, Rijmen obtained a degree in electronics engineering at the Katholieke Universiteit Leuven. Afterwards, he was a PhD student at the ESAT/COSIC lab of the K.U.Leuven. In 1997, Rijmen finished his doctoral dissertation titled Cryptanalysis and design of iterated block ciphers.
After his PhD he did postdoctoral work at the COSIC lab, on several occasions collaborating with Joan Daemen. One of their joint projects resulted in the algorithm Rijndael, which in October 2000 was selected by the National Institute for Standards and Technology (NIST) to become the Advanced Encryption Standard (AES).
Since 1 August 2001, Rijmen has been working as chief cryptographer at Cryptomathic where he cooperated with cryptographers such as Peter Landrock. From 2001–2003, Rijmen was a visiting professor at the Institute for Applied Information Processing and Communications at Graz University of Technology (Austria), and a full professor there from 2004–2007. Since October 2007, Rijmen is an associate professor (hoofddocent) at K.U.Leuven, working once again with the COSIC lab.
In 2002, he was named to the MIT Technology Review TR100 as one of the top 100 innovators in the world under the age of 35.