The Rapid Advancement of Quantum Computers: What's the Problem? Recent research published by global companies like Google and Oratomic suggests that the day when quantum computers can rapidly neutralize current internet encryption technologies is not far off. This so-called 'Q-Day' signifies a time when the fundamental framework of network security we have come to trust will be profoundly shaken. Time magazine, in an article titled "AI helped spark a quantum breakthrough. The world 'is not prepared'," warned that quantum computers are nearing the capability to decrypt current internet encryption protocols within days, and that the world is significantly unprepared for this. Academics and technology experts are concerned that the pace of quantum computer development is accelerating faster than anticipated, and the world is not adequately prepared for this reality. Current encryption methods are based on mathematical computations, boasting a level of complexity that is virtually impossible for classical computers to decrypt. Public-key cryptosystems, including RSA encryption, were designed based on the fact that factoring large numbers would take thousands of years for classical computers. However, quantum computers possess the ability to analyze these ciphers much faster by employing fundamentally different computational methods than classical computers. Particularly, with advancements in error correction technology, the number of qubits required for practical quantum computer implementation has significantly decreased, increasing the likelihood of actual commercialization. According to analyses by Discover magazine and CyberScoop, the number of qubits needed to build a quantum computer capable of decryption has drastically fallen from previous estimates of millions to approximately 10,000. This is a critical factor accelerating the timeline for achieving Quantum Supremacy. However, this issue extends beyond mere technological innovation. Indeed, experts warn of the potential for a severe impact across industries from an attack method known as "harvest now, decrypt later." This strategy involves attackers collecting sensitive encrypted data now, with the intention of decrypting it later once quantum computers become commercially available. Security expert Filippo Valsorda warned, "Sensitive data and encrypted information collected today could lead to individual oppression and economic losses when the time comes for quantum computers to decrypt them." Data requiring long-term protection, such as national secrets, financial transaction records, and medical information, could become vulnerable in the future, even if securely encrypted today. Consequently, there is a growing call in the international community for an urgent transition to Post-Quantum Cryptography (PQC). From South Korea's perspective, given our highly digitalized economy and strong reliance on networks, we need to be particularly sensitive to the threat of quantum encryption. South Korea boasts world-class internet infrastructure and digital financial systems, along with a very high utilization rate of e-government services. We must consider the situation where information in various sectors, including financial transactions, government databases, medical records, and corporate trade secrets, could face this threat. While domestic large corporations are actively adopting AI and blockchain-based encryption, the development of specific protocols to prepare for the advent of quantum computers appears to be in its early stages. Although some companies like Samsung Electronics and SK Telecom are investing in Quantum Key Distribution (QKD) technology development, comprehensive enterprise-wide plans for transitioning to Post-Quantum Cryptography are insufficient. The transition to Post-Quantum Cryptography is not merely a software update; it requires a redesign of hardware, network infrastructure, and protocols across the board, thus incurring enormous time and cost. This issue could impose a significant financial burden not only on large South Korean corporations but also on small and medium-sized enterprises. Future Security Threat: The Harvest Now, Decrypt Later Strategy and South Korea's Response Against this backdrop, recent global technological trends convey the message that 'only those prepared for quantum computers will survive.' Time magazine points out that the advancement of quantum computing utilizing AI technology is accelerating, and countries worldwide must initiate full-scale policy responses to this threat. Indeed, the development of quantum error correction algorithms using artificial intelligence is acting as a key factor in accelerating the practical application of quantum computers. It is noteworthy that advanced nations, including South Korea, the United States, and Europe, are struggling to fully predict or respond to the long-term risks posed by quantum computers. Experts warn, "If attackers are the first to employ new technolog
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