TechCapsules

AI-summarised brief · reviewed before publication

Muriel Médard, co‑founder of Optimum and MIT professor, argues that blockchain security against future quantum attacks can be achieved through classical mathematical techniques rather than quantum‑resistant hardware. She notes that nation‑state actors are already amassing encrypted data to decrypt later once quantum computers become viable, a strategy known as “harvest now, decrypt later.” Because blockchains permanently store financial, identity and governance records, they are especially vulnerable to such retroactive decryption. Médard explains that traditional cryptosystems like RSA rely on the difficulty of factoring large primes, a problem Shor’s algorithm can solve efficiently on a quantum machine. She advocates transitioning to post‑quantum cryptographic schemes grounded in well‑understood mathematical problems to safeguard the decentralized finance infrastructure before the quantum era arrives.