日本将构建600公里量子加密通信网络

Core Viewpoint - Japan is advancing the development of a quantum encryption communication network connecting the major urban areas of Tokyo, Nagoya, and Osaka, aiming for practical application by 2030 [2][5]. Group 1: Network Construction - The quantum encryption communication network will span approximately 600 kilometers and is expected to be completed by the end of the 2026 fiscal year, with practical experiments starting as early as the 2027 fiscal year [2][4]. - The network will be operated by the National Institute of Information and Communications Technology (NICT) under the Ministry of Internal Affairs and Communications, in collaboration with leading companies in communication technology such as Toshiba and NEC [4]. Group 2: Funding and Budget - The supplementary budget for the fiscal year 2025 will include hundreds of billions of yen allocated for the development of this technology [4]. Group 3: Application and Security - The network is intended for use in fields requiring high confidentiality, including the transmission of personal genomic information from medical institutions, confidential financial data, and diplomatic information from embassies [5]. - Quantum encryption communication utilizes photons to transmit encryption keys, making it theoretically unbreakable as any unauthorized attempt to intercept the information alters the state of the photons [5]. Group 4: Technological Context - The push for quantum encryption technology is driven by the anticipated advent of quantum computers around 2030, which could easily break conventional encryption methods, highlighting the need for domestically developed secure technologies from a national security perspective [5].