The bottom line: Post-quantum cryptography is an unavoidable infrastructure requirement whose implementation must be planned and begun today.
Quantum computers will challenge the cryptographic methods deployed today in the medium term. CISOs must already begin planning and implementing migration to post-quantum cryptography.
Quantum computers will be able to break the symmetric and asymmetric encryption methods on which today’s IT security is based through their computing power in the foreseeable future. This affects in particular RSA, ECC and similar methods that are widely deployed today.
This creates an immediate responsibility for CISOs: migration to post-quantum cryptography methods is not optional but an essential component of long-term security strategy. The National Institute of Standards and Technology (NIST) has already made standardized algorithms available that are considered quantum-resistant.
Concrete measures include an inventory of all systems with cryptographic functions, risk prioritization based on lifecycle and data sensitivity of processed information, and a phased upgrade to quantum-safe methods. Particularly critical are key storage, certificate infrastructure and legacy systems that cannot be modernized immediately.
Source: www.computerweekly.com · Published 19 June 2026
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