Joan Daemen pronunced [joːˈɑn ˈdaːmə(n)] in Dutch, is a Belgian cryptographer, born 1965, who co-designed the Rijndael cipher with Vincent Rijmen, which was selected as the Advanced Encryption Standard (AES) in 2001. He is also the co-inventor of Keccak, that is AES3. More on Joan Daemen can be found on his webpage.
Leo Ducas is is one of the specialists of the post quantum cryptography, especially post quantum cryptography based on hard lattice problems. More on Leo Ducas can be found on his webpage.