| year | during conferences (banquet, excursion, lectures) | during visits (research, etc.) |
| 1986: | NATO Advanced Study Institute | |
| 2001: | PKC 2001 | White House Reception (May 24, 2001, with Richard Clarke (Cyber Security czar) and Michael J. Jacobs (Deputy Director NSA)) |
| 2002: | Eurocrypt 2002 (rump session) | |
| 2005: | ACISP, CANS | Prof. Xiaoyun Wang lecturing at UCL |
| 2006: | Asiacrypt, CANS | Visiting Prof. Pieprzyk |
| 2007: | ||
| 2008: | PKC, Eurocrypt | |
| 2009: | Visiting Prof. Xiaoyun Wang in Beijing, Lecturing at Shandong University, | |
| 2010: | Eurocrypt 2010 (IACR Fellow) | Visiting Prof. Pieprzyk |
| 2011: |