| 1 | 2013 | PKC | pc chair |
| 2 | 2012 | Crypto | pc |
| 3 | 2012 | PKC | pc |
| 4 | 2011 | PKC | pc |
| 5 | 2010 | Asiacrypt | pc |
| 6 | 2009 | Eurocrypt | pc |
| 7 | 2009 | Crypto | pc |
| 8 | 2008 | PKC | pc |
| 9 | 2008 | Asiacrypt | pc |
| 10 | 2007 | Crypto | pc |
| 11 | 2007 | Asiacrypt | pc chair |
| 12 | 2006 | Asiacrypt | pc |
| 13 | 2005 | PKC | pc |
| 14 | 2004 | FSE | pc |
| 15 | 2003 | PKC | pc |
| 16 | 2001 | Eurocrypt | pc |
| 17 | 1993 | Eurocrypt | pc |