Prologue - Chapter 3 Summary

Digital Fortress by Dan Brown is a novel of deception and betrayal in the nation's most secret and powerful government organization, the National Security Agency (the NSA). Commander Trevor Strathmore believes that a former NSA employee has successfully created an unbreakable algorithm, which threatens the security of the nation and the future of the agency itself.

A man dies on the streets of Seville, Spain. As he clutches his chest and falls to the ground, Ensei Tankado realizes that he has made a horrible mistake. He knows it is too late for anyone to save him. He tries to communicate to the onlookers, begging them to look at his hand. No one understands his message but they notice that on the finger of his left hand is a gold ring with an inscription.

Susan Fletcher is dreaming of being...