We can offer optical penetration tests for a wide range of quantum key distribution setups, like BB84, BBM92, high-dimensional derivatives or measurement-device-independent scheme. We offer the infrastructure to find optical loopholes in quantum communication setups – often referred to as “quantum hacking”. We propose solutions to close such loopholes, based on state of the art security proofs. Additionally, we offer service to check for loopholes in digital postprocessing of the quantum data to make your quantum key distribution setup more secure.