Under the French presidency, the G7 cybersecurity group released a significant report on September 3 titled "Preparing for the Post-Quantum Era: A Call to Action." The report, signed by seven major world powers—France, Canada, Germany, Italy, Japan, the United Kingdom, and the United States—warns about the growing threat posed by quantum computers to current digital security systems. These advanced machines, still in development, could one day break the encryption methods that currently protect sensitive communications, financial transactions, and state secrets. The G7 urges governments and businesses to act now to prepare for this transition to more secure post-quantum cryptography (PQC). One of the main concerns highlighted in the report is the "harvest now, decrypt later" strategy. This involves adversaries intercepting and storing encrypted data today with the intention of decrypting it in the future when quantum computers become powerful enough to break current encryption standards. This poses a serious risk to both national security and corporate confidentiality. The G7 emphasizes that the transition to PQC is not only relevant for cybersecurity experts but also for all organizations, as the threat affects a wide range of industries and sectors. The report outlines five key priorities to guide the transition to post-quantum cryptography. First, it calls for raising awareness, as many organizations still underestimate the risks posed by quantum computing. The G7 stresses that this is primarily an economic and business risk, not just a technical challenge. To address this, the group recommends awareness campaigns, technical guides, and training programs to help organizations understand the importance of preparing for this shift. The report also emphasizes the need for national strategies to encourage the development and adoption of post-quantum solutions. These strategies should align with existing cybersecurity policies and focus on a gradual, risk-based approach. This includes mapping out current cryptographic systems, identifying dependencies, and creating a step-by-step transition plan. To manage costs, the G7 suggests prioritizing the replacement of equipment that is already compatible with PQC during regular updates, rather than overhauling entire systems at once. Finally, the G7 highlights the importance of research and development in post-quantum cryptography. It encourages funding for innovation and the creation of pilot projects and test environments to evaluate new cryptographic solutions before widespread use. Public-private partnerships are seen as crucial for building expertise and sharing best practices across sectors. The report concludes by urging governments to integrate post-quantum requirements into public procurement processes, ensuring that companies must prove their products' compatibility with PQC before selling to the public sector. The G7 stresses that the transition to post-quantum cryptography is no longer a distant future—it is a present challenge that demands immediate and collective action.