То есть, надо придумать проблему в виде какой-то прослойки, а потом решать проблему аудита?
А об аудите чего тогда тут может речь в случае сервисов, у которых нет лишних прослоек-переключателей?
We therefore set out to conduct a thorough evaluation of a long list of market-leading VPN services. Our team looked closely at a wide variety of factors, ranging from the design and implementation of each VPN service and its accompanying software, to the security of the vendor’s own network and internal systems. We examined each vendors’ privacy and data retention policies to ensure they logged as little user data as possible. And we considered numerous other factors, including local privacy laws, company track record, transparency, and quality of support.