Decrypting an iPhone for the FBI - Schneier on Security
www.schneier.com/blog/archives/2016/02/decrypting_an_i.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.
Make no mistake; this is what a backdoor looks like. This is an existing vulnerability in iPhone security that could be exploited by anyone.