X41 D-SEC GmbH | X41 D-Sec GmbH is a renowned expert provider for dedicated high quality security re, X41 D-Sec GmbH is a renowned expert provider for dedicated high quality security research, application security services, penetration tests, and full red teaming. Having extensive industry experience and expertise in the field of IT security, a highly effective security team of world class security experts enables X41 to perform premium security services.