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Asymmetric encryption is the foundation of internet security, but it's also the part quantum computers will destroy. The concept is elegant: you have two mathematically related keys - a public key anyone can use to encrypt messages to you, and a private key only you have to decrypt them. RSA uses the fact that multiplying two prime numbers is easy but factoring the result back into primes is nearly impossible. ECC uses similar hard math problems. The problem: in 1994, Peter Shor showed that quantum computers can factor numbers and solve discrete logarithms efficiently. A 4,000-qubit quantum computer breaks RSA-2048. A 2,000-qubit machine cracks the elliptic curves protecting Bitcoin wallets. The NIST answer is post-quantum cryptography - new math problems quantum computers can't solve.
Every HTTPS website, every VPN connection, every digital signature, every cryptocurrency transaction uses asymmetric encryption today. When quantum computers arrive, all of it becomes vulnerable overnight. NIST says federal systems must migrate by 2035.
This is why quantum computing is a cybersecurity crisis, not just a computing revolution. The entire public key infrastructure - SSL certificates, code signing, email encryption, blockchain - needs replacement. Organizations that don't migrate face data breaches, compliance failures, and loss of customer trust.
Today: TLS/SSL certificates securing websites, digital signatures for documents and code, cryptocurrency transactions, VPN key exchange, email encryption, blockchain authentication. Tomorrow: Must migrate to CRYSTALS-Kyber and CRYSTALS-Dilithium or quantum key distribution
https://www.qnulabs.com/qnu-labs-hybrid-approach-blending-quantum-and-post-quantum-cryptography-for-future-proof-security/ | https://www.qnulabs.com/blog/
asymmetric encryption, public key cryptography, RSA, ECC, elliptic curve, quantum vulnerable, Shor algorithm, quantum threat, post-quantum cryptography, PQC migration, PKI security