Hacker News Reader

Meanwhile encryption itself will become illegal, unless it can be backdoored.

Most English sentences can be read in different ways with different meanings, so one must always gage the probability that the author is rational and intended that meaning

probably no: (successfully) prevents (all) unauthorized copying

probably yes: (exists to) prevent (at least one instance of) unauthorized copying

Why? Aren’t Blu-ray discs encrypted?

Did it prevent unauthorized copying?

(Not sure if OP referred to that though)

Exactly, the encryption didn’t prevent unauthorized copies.

Even DVDs are. It's just been broken for years.