Apple rarely offers anyone a glimpse inside its walled-off
security garden. The last time it did was in the spring of 2012
when it released a detailed paper on the security of its iOS
operating system for iPhones and iPads. The company also
presented a much-anticipated if not anticlimactic presentation
at the Black Hat Briefings that summer summarizing the high
points of the paper.  Now, scant days after the revelation that
a stunningly simple coding mistake led to emergency updates for
iOS and OS X in order to close a cavernous SSL certificate-
validation vulnerability, Apple has released an updated iOS
security guide.  The 33-page document explains in a helpful
degree of detail the inner workings of iOS system security,
encryption and data protection capabilities, network security,
device controls, application security and security around its
Internet services such as iCloud, iCloud Keychain, iMessage and
more.  The application security and Internet services sections
are new additions to the paper. The servi