Quantum computing could undermine widely used public-key encryption, driving research into quantum-resistant algorithms and secure migration planning.
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Background for this topic.
Quantum computing uses quantum-mechanical effects in qubits to solve some problems differently from conventional computers. In information security, its significance is primarily cryptographic: a sufficiently capable, fault-tolerant quantum computer could use Shor’s algorithm to break RSA and elliptic-curve cryptography, which protect certificates, key exchanges, signatures, and encrypted archives. Quantum computing is not expected to break all cryptography equally; symmetric encryption and cryptographic hashes generally require larger security parameters rather than replacement for the same reason.
The practical concern is “harvest now, decrypt later”: adversaries can collect encrypted traffic today for future decryption, especially when data must remain confidential for years. Organizations should inventory public-key algorithms and long-lived sensitive data, assess dependencies such as certificates and protocols, and plan migration to standardized post-quantum cryptography with crypto-agile systems. Quantum key distribution is a separate, specialized communications approach; it does not replace endpoint security, authentication, or conventional key-management controls and has significant deployment constraints.
Weekly headline count for the current query.
Microsoft has brought forward its timelines for transitioning to post-quantum cryptography (PQC)
All US federal agencies will have to complete their post-quantum cryptography transition by 2031, according to a new Trump Executive Order
Forescout VP of security intelligence, Rik Ferguson, warns that Q-day is fast approaching
GCHQ director urges urgent business cyber action as AI and quantum reshape the threat
‘Q-Day’ and the cybersecurity problems it brings could come as early as 2029 as Google accelerates its post-quantum cryptography migration
Infosecurity Europe 2026 reveals its keynote line-up, featuring Jason Fox, Shlomo Kramer, Cynthia Kaiser and more, with sessions on AI, cloud security and post quantum threats
Google Chrome initiates quantum-resistant measures via Merkle Tree Certificates to secure HTTPS
CISA released initial list of PQC-capable hardware and software to guide companies amid quantum threats
The financial sector should finalize its post-quantum cryptography transition circa 2034, G7 cyber experts said
KnowBe4 claims the new Quantum Route Redirect kit is supercharging phishing attacks on Microsoft365 users
Microsoft has set out a roadmap to complete transition to PQC in all its products and services by 2033, with roll out beginning by 2029
The EU’s Quantum Strategy includes plans to develop secure quantum communication infrastructure across the region
CISOs should demand more of their vendors and use regulation as an ally to persuade board members to accelerate the transition to post-quantum safety
DigiCert survey finds only 5% of global businesses are using post-quantum cryptography
The impact of the advancement in quantum computing on cybersecurity will be a key focus at this year’s Infosecurity Europe event
An ISACA survey found that just 5% of organizations have a defined strategy to defend against quantum-enabled threats
Standards body ETSI has defined a scheme for key encapsulation mechanisms with access control (KEMAC), enabling quantum-secure encryption
New NCSC guidance sets out a three-phase migration to post-quantum cryptography, designed to ensure all systems are protected from quantum attacks by 2035
World-renowned physicist, Professor Brian Cox, will headline day one of Infosecurity Europe, analyzing the science behind quantum computing and the challenges it brings
Cloudflare introduces E2E post-quantum cryptography, enhancing security against quantum threats