| 1 | 2012 | Asiacrypt | pc |
| 2 | 2012 | FSE | pc |
| 3 | 2011 | Asiacrypt | pc |
| 4 | 2010 | FSE | pc |
| 5 | 2009 | FSE | pc |
| 6 | 2008 | FSE | pc |
| 7 | 2007 | FSE | pc |
| 8 | 2006 | Eurocrypt | pc |
| 9 | 2006 | Asiacrypt | pc |
| 10 | 2006 | FSE | pc |
| 11 | 2005 | FSE | pc |
| 12 | 2004 | Crypto | pc |
| 13 | 2004 | FSE | pc chair |
| 14 | 2003 | FSE | pc |
| 15 | 2002 | FSE | pc |
| 16 | 2001 | Eurocrypt | pc |
| 17 | 1999 | Eurocrypt | pc |
| 18 | 1995 | Crypto | pc |