Цифровая крепость

In this book, Dan Brown offers to crack yet another code — a super complex one, harboring danger and threat to the entire world! But... who invented this code? What does it aim for? Why did it engage in a ruthless game with the U.S. National Security Agency? The weapon of the mysterious enemy is merely a set of symbols and letters. The best cryptographer in America, Susan Fletcher, takes on the decryption. And what she discovers threatens not only the most important developments of the U.S. intelligence agencies but also the fates of millions of people... From this moment on, a real hunt begins for Susan..