Learn English – What does the phrase ‘I feel like a pig in a wig’ mean

'Faust' is the main character in German legend. From Wikipedia:

Faust or Faustus (Latin for "auspicious" or "lucky") is the protagonist of a classic German legend. Though a highly successful scholar, he is unsatisfied, and makes a deal with the devil, exchanging his soul for unlimited knowledge and worldly pleasures.

Making a 'Faustian bargain' can be interpreted as making a deal with the devil - it may seem like a good deal, but there is always a catch, and that catch is usually very, very bad.

Here is a wikipedia article discussing 'Deals with the Devil', which they also term as a 'Faustian bargain':

http://en.wikipedia.org/wiki/Deal_with_the_devil

Here's the quote with a bit more context:

"We're going to double down on secrecy on products," Cook said, but on other things, "we will be the most transparent company in the world," - like social good and supplier practices.

Double down is originally a blackjack term to play for double or nothing.

It is used more generally to mean make a calculated gamble to double your commitment, to concentrate or focus on something.

But it seems like use is changing, and it's simply means you will try twice as hard (as there's always some inherent risk in everything).

Cook is simply saying Apple are going to be more serious and committed about product secrecy.

The linked question asks about:

Palin is notorious for doubling-down on perceived missteps, typically blaming a biased media for not telling the whole story.

This is similar; Sarah Palin concentrates and pays extra attention when people claim she makes mistakes, usually trying to deflect blame to the media.