A right that you have is one that cannot be taken away. Traditionally this is limited to things that society has agreed not to take away. However we are slowing entering into an age where a new type of right emerges: a right that you seized and society is powerless to take away.
We don't normally think of "PGP'd email can't be read" as a "right", but that is essentially what it is. A right that has been seized, not granted.
These rights are of course vulnerable, just like rights granted by society. Instead of keeping society convinced that the right must remain granted, you instead have to be careful that you remain in a position where society is powerless. In practice, this is quite difficult.
For that matter, this applies even to granted rights. There are plenty of rights that people have that are outlawed by unenforced (and unenforceable laws). Consider for example laws in less enlightened states that specify what sorts of sex two consenting adults are allowed to have. These laws are not enforced, making them little more than monuments to the ignorance of the past.
Irrelevant; it isn't a right if you can't defend yourself in court if you're caught doing it and detecting someone using encryption is not at all difficult. We're talking about rights here, not "what I can get away with". You position isn't defensible.
In this context, the issue though, is what rights should "society" in the large recognize and hold as sacrosanct. I argue that the basic essence of being a conscious, self-aware individual, with agency and self-ownership of your body, entails what Bastiat refers to as the "inherent right to self defense". Others are, obviously, free to disagree.