That's up to you - what techniques do you know that allows you to process personal data which ensures it's secure? It's a law, not a specification or an implementation detail.
More general, it's difficult to understand because it's in legalese, which is aimed at people that studied it for years - it's the English programming language. And like code, there's lots of holes in it that it doesn't cover, despite lots of manyears of effort.
More general, it's difficult to understand because it's in legalese, which is aimed at people that studied it for years - it's the English programming language. And like code, there's lots of holes in it that it doesn't cover, despite lots of manyears of effort.