Because of how Internet enablement extends across much of modern business, much of what we do depends on effective (i.e., good-enough) encryption. At some point quantum computers (or quantum computing cloud services) will be able to break many/most industry standard encryption implementations. For high-value and/or high-sensitivity use cases -- think financial services or unique intellectual property -- that presents a number of future risks. Based on my experience in global financial services, re-tooling encryption implementations throughout an enterprise infrastructure and operations to achieve a risk-relevant level of quantum-resilience would currently be a gigantic, expensive effort (if not simply impractical) of material duration (years, not months). With whose givens, it would not be risk-appropriate to wait -- expecting to treat the arrival of that "quantum-threat" as a crisis. It is equally risk-inappropriate to just hope that quantum-resilient encryption will appear and be easy to integrate into your environment(s).
Investors, and later, regulators, will also be interested in every organization's quantum-resilience. If responsible management is not the right motivator, consider losing the ability to finance operations or growth, or to be penalized by your regulator(s) for quantum readiness sloth.
Here are some resources to learn more about this topic:
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Open-Source Quantum Development. Qiskit [quiss-kit] is an open-source SDK for working with quantum computers at the level of pulses, circuits, and application modules. (Python 3.7+ in a virtual environment with Anaconda) quiskit
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IBM Quantum Lab https://quantum-computing.ibm.com/lab
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"Qiskit Textbook" -- It is really a broad (comprehensive?) course on the topic https://qiskit.org/learn/
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"Entangled Secrets." By Stefan-Lukas Gazdag, Sophia Grundner-Culemann, Tobias Guggemos, Tobias Heider, and Daniel Loebenberger; Linux Magazine, Issue 247/2021 https://www.linux-magazine.com/Issues/2021/247/Quantum-Computing-and-Encryption
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"Google and NASA Partner in Quantum Computing Project -- Vendor D-Wave scores big with a sale to NASA's Quantum Intelligence Lab." By Joe Casad; May 21, 2013 https://www.linux-magazine.com/Online/News/Google-and-NASA-Partner-in-Quantum-Computing-Project
https://en.wikipedia.org/wiki/Anathem
https://www.nealstephenson.com/anathem.html
By Neal Stephenson
Published 2008, 937 pages.
See the plot summary at: https://en.wikipedia.org/wiki/Anathem#Plot_summary
When you are finished with the book (or whenever...) consider reading Stephenson's Acknowledgments page to get a sense of what parts of this story are more tightly coupled to other's ideas.
This story has enormous scope, incorporating a broad spectrum of science fiction and religious themes as it builds out science, technology, religion, and secular societies across multiple worlds.