At the end of the day, I am the one person who has to answer that question/is responsible for being GDPR compliant. I've spent hours doing research, figuring out what we need to do and implementing it -- and it's a hollow victory because even though I've said yes and have 100s of articles/white papers/opinions that back up the decisions I've made, the real answer is still "I don't know".
And I absolutely know I'm not alone in this. I got GDPR compliance dropped on my lap because I did security compliance -- if you contrast NIST 800-53/800-171 against GDPR you'll see why people are pissed off. One has clear guidelines with enough room for evolving best practices written by obviously competent/experienced professionals, the other is written as basically "we'll know it when we see it".
Sounds like a win for the GDPR to me, we know rigid checkbox-ticking is ineffective.
Apart from that, NIST 800-53/800-171 are catalogs of "security controls and associated assessment procedures" for "Federal Information Systems and Organizations". GDPR is a data protection regulation in the context of the EU legal system. Apples to oranges.
Yes, because if I’m supposed to comply with something, I want to know exactly what I’m complying with.
Right now I think I’m already doing everything in good faith, but the enforces of the GDPR may think different.
This is why we have laws- so we can be held accountable exactly.