| 1 | 2010 | FSE | pc |
| 2 | 2010 | Asiacrypt | pc |
| 3 | 2009 | FSE | pc |
| 4 | 2009 | Asiacrypt | pc |
| 5 | 2009 | PKC | pc |
| 6 | 2008 | Crypto | pc |
| 7 | 2008 | FSE | general chair |
| 8 | 2007 | CHES | pc |
| 9 | 2007 | PKC | pc |
| 10 | 2007 | Asiacrypt | pc |
| 11 | 2007 | FSE | pc |
| 12 | 2006 | Eurocrypt | pc chair |
| 13 | 2006 | Asiacrypt | pc |
| 14 | 2005 | PKC | general chair |
| 15 | 2005 | PKC | pc chair |
| 16 | 2005 | FSE | pc |
| 17 | 2004 | Crypto | pc |
| 18 | 2004 | CHES | pc |
| 19 | 2004 | PKC | pc |
| 20 | 2004 | Asiacrypt | pc |
| 21 | 2004 | FSE | pc |
| 22 | 2003 | Eurocrypt | pc |
| 23 | 2003 | PKC | pc |
| 24 | 2003 | FSE | pc |
| 25 | 2002 | Asiacrypt | pc |
| 26 | 2000 | PKC | pc |
| 27 | 2000 | Asiacrypt | pc |
| 28 | 2000 | FSE | pc |
| 29 | 1999 | Crypto | pc |
| 30 | 1999 | FSE | pc |
| 31 | 1998 | Eurocrypt | pc |
| 32 | 1998 | FSE | general chair |
| 33 | 1998 | FSE | pc chair |
| 34 | 1996 | Eurocrypt | pc |
| 35 | 1995 | Crypto | pc |