- C. Paar, "Why We Should Be Worried about Hardware Trojans", Invited talk at The Summer Research Institute, EPFL, June 18, 2018.
- C. Paar, "Hardware Trojans and Other Threats against Embedded Systems", Keynote at ASIA-CCS (ACM Asia Conference on Computer and Communications Security), April 3, 2017.
- C. Paar, "Constructive and Destructive Aspects of Embedded Security for the Internet of Things", Invited tutorial at CCS 2013 (ACM Conference on Computer and Communications Security), November 5, 2013.
- C. Paar, "Physical Attacks in a Physical World", Invited Talk at the Massachusetts Institute of Technology, June 4, 2010.
- T. Güneysu, "High Performance ECC over NIST Primes on Commercial FPGAs", Invited talk at the 12th Workshop on Elliptic Curve Cryptography (ECC 2008), Trianon Zalen Utrecht, The Netherlands, September 22-24, 2008.
- C. Paar, "The Next 10 Years of IT Security: RFID, BMWs and Burglars", Invited talk at Stanford University, August 20, 2008.
- A. Poschmann, "Lightweight Cryptography From an Engineers Perspective", Invited talk at the 11th Workshop on Elliptic Curve Cryptography (ECC 2007), Claude Shannon Institute/University College Dublin, Ireland, September 5-7, 2007.
- C. Paar, "Light-Weight Cryptography for Ubiquitous Computing", Invited talk at the University of California, Los Angeles (UCLA), Institute for Pure and Applied Mathematics, December 4, 2006.
- C. Paar, "Breaking Ciphers with COPACOBANA - A Cost-Optimized Parallel Code-Breaker", Talk at the Workshop on Cryptographic Hardware and Embedded Systems - CHES 2006, Yokohama, Japan, Oktober 11-13, 2006.
- Jan Pelzl, "Exact Cost Estimates of Attacks on ECC with Special-Purpose Hardware", The 10th Workshop on Elliptic Curve Cryptography - ECC 2006, The Fields Institute, Toronto, Canada, September 18-20, 2006.
- C. Paar, "Public-Key Building Blocks", Invited talk at the Summer School on Cryptographic Hardware, Side-Channel and Fault Attacks, Louvain-la-Neuve, Belgium, June 13, 2006.
- T. Wollinger, "Hardware Implementation of Hyperelliptic Curve Cryptosystems", Invited talk at ECC 2004, Ruhr-University Bochum, Germany, September 20-22, 2004.
- C. Paar, "Pervasive Computing and the Future of Crypto Engineering", Invited talk at the École Polytechnic Fédéral de Lausanne (EPFL), Switzerland, December 15, 2003.
- C. Paar, "Past and Future of Cryptographic Engineering", half-day tutorial at HOT CHIPS 2003, Stanford University, USA, August 22, 2003.
- C.Paar, "Hyperelliptic curve cryptosystems for embedded applications", Invited talk at ECC 2003, University of Waterloo, Canada August 11-13, 2003.
- C. Paar, "Reconfigurable Hardware in Modern Cryptography", Invited presentation at the 4th Workshop on Elliptic Curve Cryptography (ECC 2000), Institute for Experimental Mathematics, Essen, Germany, October 04-06, 2000.
- C. Paar, "Implementation options for finite field arithmetic for elliptic curve cryptosystems", invited presentation at the 3rd Workshop on Elliptic Curve Cryptography (ECC '99), University of Waterloo, Ontario, Canada, November 01-03, 1999.