---
title: Quantum Threat Timeline Report 2025
description: Quantum Briefing June 2026, produced by GRI and evolutionQ, examines recent quantum-computing developments and their implications for cybersecurity.
---

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# Quantum Briefing June 2026

#### Recent quantum-computing progress and its implications for cybersecurity

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**This briefing, collaboratively produced by evolutionQ and the Global Risk Institute (GRI), examines recent quantum-computing developments and their implications for cybersecurity,** including new research papers that significantly reduce the estimated resources needed to break widely used public-key cryptography. In response, Google has expanded its quantum hardware roadmap and moved up its internal target for post-quantum migration to 2029. The briefing highlights that digital signatures and authentication, not just data confidentiality, represent a priority risk as the quantum threat timeline continues to shrink. Given this accelerating pace of progress, organizations should treat cryptographic inventory, crypto-agility, and post-quantum migration as immediate priorities.

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