Read the full article at http://belfercenter.ksg.harvard.edu/publication/26946/cryptography_and_sovereignty.html
"Encryption's new normal is changing the way in which states assert their sovereignty at home and abroad.
Cryptography has gone mainstream. Now more than ever, encryption is used by ordinary citizens, often without their knowledge, and is a subject of national debate. Intelligence and law-enforcement officials warn of the dangers of messages they cannot read. Presidents and prime ministers weigh in on the way cryptography shapes the balance between liberty and security."