I'm confused by the meaning of or in this sentence:
Encryption poses a problem for intelligence agencies by scrambling data with a secret code so that even if they, or any other third-party, manages to capture it, they cannot read it—unless they possess the key to decrypt it or have the ability to crack the encryption scheme.
If we look at these example usages of or:
A. I don't like apples or oranges.
B. I ignored it not simply because I was sick or I didn't care about it.
In both these sentences, the or implies that neither of the options are right. In the case of A, I like neither apples nor oranges. In the case of B, neither because I was sick nor because I didn't care about it. (They are both wrong.)
However, in the excerpt above, it doesn't sound like this is true. If I apply the interpretation above to the part containing "or" here, it would mean that they would have to have both the key to decrypt it and have the ability to crack the encryption. Because "unless they possess the key or have the ability" means "if they don't possess the key or have the ability," which means that this or the rule applied above transferred to this as well, would mean the aforementioned.
What's going on here?