Quantum computing is coming for your encryption: the real-world blast radius скачать в хорошем качестве

Quantum computing is coming for your encryption: the real-world blast radius

Article link: https://open.substack.com/pub/johanos... Quantum computing won’t arrive with a single dramatic “Q-day” where everything suddenly collapses. The real danger is slower and more practical: attackers can steal encrypted data today and store it, then decrypt it later when quantum capability matures. That “harvest now, decrypt later” risk matters most for information that stays sensitive for years, like children’s health and education records, long-term financial data, and government identity information. The article maps the likely real-world blast radius across banks, schools, hospitals, WhatsApp-style messaging, and national ID systems, then offers a simple way for organisations to prioritise. The core approach is: protect long-life secrets first (because they’re most exposed to delayed decryption), then secure trust chains (certificates, signatures, authentication) that keep digital identity and transactions credible. Practical steps include doing a cryptography inventory, demanding crypto-agility from vendors, and starting post-quantum migration planning now rather than later.