| 1 | 2010 | CHES | general chair |
| 2 | 2009 | CHES | pc |
| 3 | 2008 | CHES | pc |
| 4 | 2005 | Asiacrypt | pc |
| 5 | 2004 | CHES | pc chair |
| 6 | 2002 | PKC | pc |
| 7 | 2001 | CHES | pc |
| 8 | 2000 | CHES | pc |
| 9 | 2000 | PKC | pc |
| 10 | 1999 | Eurocrypt | pc |
| 11 | 1999 | Crypto | pc |
| 12 | 1999 | CHES | pc |
| 13 | 1998 | Crypto | pc |
| 14 | 1995 | Eurocrypt | pc |
| 15 | 1995 | Crypto | pc |
| 16 | 1989 | Eurocrypt | pc chair |
| 17 | 1987 | Eurocrypt | pc |
| 18 | 1984 | Eurocrypt | pc |