Post-Quantum Cryptography & Quantum-Safe Systems
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Introduction The digital world relies heavily on cryptography — the science of securing data. Everything from online banking, medical records, e-commerce transactions, to national defense communications depends on encryption. But a new revolution is coming: Quantum Computing . While quantum computers promise unimaginable computational power, they also threaten to break today’s encryption systems — the same systems that secure our entire digital infrastructure. This is where Post-Quantum Cryptography (PQC) and Quantum-Safe Systems come into play. These technologies aim to future-proof our security against the coming “Q-Day” — the day when quantum computers become powerful enough to break classical cryptography. Why Post-Quantum Cryptography Matters 1. The Threat from Quantum Computers Modern cryptographic algorithms like RSA , ECC (Elliptic Curve Cryptography) , and Diffie-Hellman rely on the fact that certain mathematical problems (like factoring very large numbers) are practic...