Schneier on Security: iPhone Encryption and the Return of the Crypto Wars
www.schneier.com/blog/archives/2014/10/iphone_encrypti_1.html
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
Ah, but that's the thing: You can't build a backdoor that only the good guys can walk through. Encryption protects against cybercriminals, industrial competitors, the Chinese secret police and the FBI. You're either vulnerable to eavesdropping by any of them, or you're secure from eavesdropping from all of them.