This Festschrift volume published in honor of Jean-Jaques Quisquater on the occasion of his 65th Birthday contains 33 papers from colleagues all over the world and deals with all the fields to which Jean-Jaques dedicated his work during his academic career. Focusing on personal tributes and re-visits of Jean-Jaques Quisquater s legacy the volume addresses the following central topics: symmetric and asymmetric cryptography side-channels attacks hardware and implementations smart cards and information security. In addition there are four more contributions just as diverse as Jean-Jacques scientific interests .