Store Now, Decrypt Later

Store Now, Decrypt Later examines one of the most serious cyber risks of the coming decade. Encrypted data stolen today may remain unreadable for years, then become exposed when quantum computing reaches the point where current public-key cryptography no longer holds. This book explains why the threat is not a distant laboratory issue, but a present governance, security, legal, and operational problem for organisations holding long-lived sensitive information. Based on the manuscript, the core focus is the "store now, decrypt later" model, the weakness of RSA and ECC under future quantum attack, the long life of sensitive records, data exposure across the organisation, post-quantum migration, crypto inventory, governance, vendor dependence, and executive action.

Written in a direct and practical style, the book moves from the basics of encrypted data risk to the harder questions faced by boards, CISOs, CIOs, technology leaders, compliance teams, auditors, and risk managers. It explains how quantum computing changes old security assumptions, why sensitive information remains exposed even when encrypted, and how long-term confidentiality creates a present duty to act. Readers are taken through the mechanics of classical encryption, the quantum threat to public-key systems, AI-assisted cryptanalytic pressure, the role of data in transit, data at rest, and data in use, and the strategic logic behind post-quantum cryptography.

A central strength of this book lies in its managerial and operational angle. Instead of treating post-quantum cryptography as a narrow technical matter, it places the issue inside business continuity, records protection, supply-chain assurance, digital trust, policy design, and board oversight. The discussion covers high-risk sectors such as defence, healthcare, finance, government, telecoms, and critical infrastructure, while also addressing the exposure created by third parties, legacy systems, embedded cryptography, and long migration cycles. Special attention is given to crypto discovery, inventory building, prioritising systems and records, migration planning, testing, governance, and the cost and timing trade-offs facing large organisations.

Store Now, Decrypt Later is for decision-makers who need more than theory. It is for professionals who need a structured view of what is at stake, why waiting is dangerous, which records and systems deserve priority, and how to move from awareness to implementation. Readers working in cybersecurity, technology risk, digital transformation, audit, compliance, operational resilience, public administration, and regulated industries will find a clear route through the confusion surrounding quantum risk. The result is a focused guide to delayed breach, encrypted data fragility, and the organisational challenge of moving towards post-quantum security before today's protected information becomes tomorrow's exposed plaintext.