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Dan Brown's 1998 technothriller Digital Fortress focuses on NSA cryptographer Susan Fletcher as she navigates a dangerous, "unbreakable" code crisis that threatens U.S. intelligence surveillance [21, 24, 27]. The 128-chapter novel, which features characters racing to solve the mystery in Spain, is a work of fiction that explores the intersection of cryptography and national security [15, 21, 35]. As the full, copyrighted text cannot be provided, you may find the novel available for purchase or borrowing through various online retailers and library platforms [5, 29].