Gerhard Gessler received his Diploma in Electric Engineering at the Technical University of Munich. He has been working in several projects with the main focus in the area of IP Security and Internet technology. Since one and a half year he is coordinating IABG's activities in the field of security for the Next Generation Internet. Within this area he is actively contributing to the FreeS/WAN group and is there responsible for the integration of the IPSec functionality for IPv6. Beside that Gerhard Gessler consults the German Security Agency in security issues for the Next Generation Internet and participates in the standardization process of IETF in the area of IPSec, IPng, IP mobility and IP multicasting.