Post-Quantum Cryptography and the Future of Secure Communications: Professor Kai London Explains

 

By the Finnish Express Technology Desk

Professor Kai London, board advisor and interim/fractional CISO, CIO and CTO
Professor Kai London — board advisor & interim CISO/CIO/CTO. Credit: professorkailondon.com

The confidentiality of communications rests on cryptography — and that cryptography faces an eventual reckoning with quantum computing. For telecoms and secure-communications providers, Professor Kai London, a senior CISO, argues preparation must begin now. “Communications that must stay confidential for years are already exposed to the harvest-now-decrypt-later threat,” he says.

“Adversaries capture encrypted traffic today to decrypt it once quantum computers mature. For anything that must remain secret over time, the clock has already started.”

Why communications are especially exposed

London notes that intercepted communications have long shelf lives — diplomatic, commercial and personal data that remains sensitive for years. “If it must stay confidential into the next decade, it is already at risk,” he says.

The standards are here

Concrete post-quantum algorithms have been standardised. “We have moved from a warning to a specification,” London says. “Providers can begin migrating with real algorithms rather than waiting.”

A migration roadmap

Discover where cryptography is used across the network; prioritise long-lived, high-value confidentiality; demand post-quantum roadmaps from equipment vendors; pilot hybrid classical/post-quantum schemes; and build crypto-agility so future changes are seamless. “For a network, agility is everything,” he says. “You will change algorithms more than once.”

Plan, not panic

“No one should rip out systems this quarter,” London stresses, “but every provider should know where its cryptography lives and have a phased plan.” Regulators and security-conscious customers will increasingly expect it.

For a sector whose entire value rests on trustworthy communication, London's counsel is to treat the quantum transition as a strategic programme — started early and governed with the seriousness the confidentiality of a nation's communications deserves.

About Professor Kai London. Professor Kai London is a senior technology, security and transformation executive with 25+ years of board- and C-suite leadership across banking, aviation, defence, government and critical national infrastructure. He is Founder & CEO of Quantum AI Systems Security, an Honorary Professor in Cybersecurity, AI & Quantum Computing and a UCL researcher, holding CISSP, CISM, CCISO, ISO 27001 Lead Auditor, ISO 42001, DORA and NIS2 credentials. He is available for board advisory, NED and interim/fractional CISO/CIO/CTO mandates across the UK and internationally. Learn more at professorkailondon.com.

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