Cyber & Technology — 2026-05-17
Google Warns Quantum Computers May Crack Encrypted Systems by 2029 as Harvest-Now Decrypt-Later Attacks Loom
BLUFOrganizations relying on the 2035 migration deadline have likely already lost data, since adversaries harvesting encrypted traffic today could decrypt it before post-quantum defenses are in place.
Google researchers reported on May 17 a roughly 20-fold reduction in the physical qubits needed to break
Analysis
Google's qubit reduction compresses the quantum threat timeline from a vague 2030s horizon to a specific 2029 target. For any organization holding data that must stay confidential beyond three years, harvest-now-decrypt-later shifts from theoretical concern to an operational planning constraint. Organizations that scheduled post-quantum migration around NSA's 2035 CNSA 2.0 deadline may have already accumulated ciphertext decryptable before migration completes. Per a single CNN article without independent cryptographic peer review, the 2029 date is unvalidated by NIST or competing programs, and the timeline may reflect optimistic projections calibrated to sustain quantum investment rather than engineering consensus.
Google's qubit reduction compresses the quantum threat timeline from a vague 2030s horizon to a specific 2029 target. For any organization holding data that must stay confidential beyond three years, harvest-now-decrypt-later shifts from theoretical concern to an operational planning constraint. Organizations that scheduled post-quantum migration around NSA's 2035 CNSA 2.0 deadline may have already accumulated ciphertext decryptable before migration completes. Per a single CNN article without independent cryptographic peer review, the 2029 date is unvalidated by NIST or competing programs, and the timeline may reflect optimistic projections calibrated to sustain quantum investment rather than engineering consensus.