[Machine Translation] How was the German military's most powerful encryption machine broken? RSA ciphers, PGP ciphers, quantum computers, quantum cryptography... The present and future of cryptography, which surrounds us without our knowledge, including the Internet and banking, and the masterpieces of nonfiction that reveal the hidden human drama behind history. This is a masterpiece of nonfiction that reveals the present and future of cryptography, which surrounds us without our knowledge, including the Internet and banks, as well as the human drama behind the history. Included at the end of the book is "The Strongest Cryptography in History" and its solution.