On June 16, local time, scientists at the Chicago Quantum Exchange (CQE) announced the first use of the Quantum Key Distribution Network (QKD) to connect laboratories in the city and suburbs of Chicago. At present, Toshiba has conducted quantum security experiments on this nearly 200-kilometer-long quantum key distribution network. 
Earlier, Toshiba, a Japanese comprehensive electronics company, and the Chicago Quantum Exchange announced in April this year that they would start a quantum key distribution network link using Toshiba's multiplexed QKD units to connect the University of Chicago and the U.S. Department of Energy Argonne National Laboratory (ANL).
At present, the length of the Chicago quantum key distribution network has been expanded to 124 miles, or about 200 kilometers, which is nearly twice the length of the previous longest QKD network in the United States. The QKD network, consisting of six nodes and 124 miles of fiber, transmits particles carrying quantum-encoded information between the U.S. Department of Energy's Argonne National Laboratory in suburban Lemont and two buildings south of Chicago. The two buildings are located on the University of Chicago campus and the CQE headquarters in Chicago's Hyde Park neighborhood.
It is reported that the Chicago QKD network will soon be open to academia and related industries, and will soon become one of the first public test platforms for quantum security technology in the United States. The network actively operates quantum-secure protocols using technology provided by Toshiba, delivering quantum key distribution at speeds exceeding 80,000 qubits per second between Chicago and the western suburbs over fiber optics. Toshiba's participation in the QKD network project also marks a collaboration between academia, government and industry on quantum QKD networks.
Researchers will use the Chicago QKD network to test new communication devices, security protocols and algorithms that will eventually connect to remote quantum computers in the United States and around the world. This work contributes to the further establishment of a national quantum internet that will have far-reaching implications for its communications, computing and national security.
In 2020, the U.S. Department of Energy (DOE) announced a strategic blueprint for the development of the quantum Internet at a press conference at the University of Chicago. But what exactly is a quantum internet? Pan Jianwei, an academician of the Chinese Academy of Sciences and a professor at the University of Science and Technology of China, believes that the Internet is a global system for transmitting, processing and storing classical information. The quantum internet can transmit, process and store quantum information in the same way. The first practical task of the quantum internet is global key sharing in an unconditionally secure way (ie quantum information is completely tamper-proof). Qubits and quantum entanglement (the state in which qubits are interconnected) will be fundamental resources for a quantum internet. This system will enable numerous quantum information tasks, including quantum teleportation between arbitrary nodes, distributed quantum computing, and high-precision quantum measurements.
Scientists foresee that quantum computers present both an opportunity and a fundamental threat. Once put into use, quantum computers are expected to solve complex problems that are almost impossible for ordinary computers to solve, but can also easily crack current encryption technology. In April, members of the U.S. Congress introduced the Quantum Cybersecurity Preparedness Act, which prioritizes timely quantum-resistant encryption of sensitive information to prevent criminals from stealing current data and reusing future quantum data computer to decrypt.
Therefore, scientists believe that the realization of quantum-secure communication networks is one of the most important technological frontiers of the 21st century.
Key distribution is an essential part of most internet security, and quantum technology can help provide better defenses against hackers. In quantum key distribution, a quantum-secure protocol is used to distribute encrypted digital keys between parties transmitting communication-sensitive data. Quantum keys are transmitted by photons through an optical fiber network, using the quantum properties of photons to encode the qubits that make up the key. This kind of unbreakable communication has application value in many fields, including finance, defense and other industries.
“We are excited to continue our collaboration with the Chicago Quantum Exchange as this QKD network trial unfolds,” said Yasushi Kawakura, vice president of digital solutions at Toshiba. the quantum threat."
Picture from Chicago Quantum Exchange (CQE)
The Chicago Quantum Exchange (CQE) is located at the University of Chicago and is co-founded by the University of Chicago, the University of Illinois at Urbana-Champaign, Northwestern University, the University of Wisconsin-Madison, Fermi National Accelerator Laboratory, and the U.S. Department of Energy's Argonne National Laboratory. .Earlier, Toshiba, a Japanese comprehensive electronics company, and the Chicago Quantum Exchange announced in April this year that they would start a quantum key distribution network link using Toshiba's multiplexed QKD units to connect the University of Chicago and the U.S. Department of Energy Argonne National Laboratory (ANL).
At present, the length of the Chicago quantum key distribution network has been expanded to 124 miles, or about 200 kilometers, which is nearly twice the length of the previous longest QKD network in the United States. The QKD network, consisting of six nodes and 124 miles of fiber, transmits particles carrying quantum-encoded information between the U.S. Department of Energy's Argonne National Laboratory in suburban Lemont and two buildings south of Chicago. The two buildings are located on the University of Chicago campus and the CQE headquarters in Chicago's Hyde Park neighborhood.
It is reported that the Chicago QKD network will soon be open to academia and related industries, and will soon become one of the first public test platforms for quantum security technology in the United States. The network actively operates quantum-secure protocols using technology provided by Toshiba, delivering quantum key distribution at speeds exceeding 80,000 qubits per second between Chicago and the western suburbs over fiber optics. Toshiba's participation in the QKD network project also marks a collaboration between academia, government and industry on quantum QKD networks.
Researchers will use the Chicago QKD network to test new communication devices, security protocols and algorithms that will eventually connect to remote quantum computers in the United States and around the world. This work contributes to the further establishment of a national quantum internet that will have far-reaching implications for its communications, computing and national security.
In 2020, the U.S. Department of Energy (DOE) announced a strategic blueprint for the development of the quantum Internet at a press conference at the University of Chicago. But what exactly is a quantum internet? Pan Jianwei, an academician of the Chinese Academy of Sciences and a professor at the University of Science and Technology of China, believes that the Internet is a global system for transmitting, processing and storing classical information. The quantum internet can transmit, process and store quantum information in the same way. The first practical task of the quantum internet is global key sharing in an unconditionally secure way (ie quantum information is completely tamper-proof). Qubits and quantum entanglement (the state in which qubits are interconnected) will be fundamental resources for a quantum internet. This system will enable numerous quantum information tasks, including quantum teleportation between arbitrary nodes, distributed quantum computing, and high-precision quantum measurements.
Scientists foresee that quantum computers present both an opportunity and a fundamental threat. Once put into use, quantum computers are expected to solve complex problems that are almost impossible for ordinary computers to solve, but can also easily crack current encryption technology. In April, members of the U.S. Congress introduced the Quantum Cybersecurity Preparedness Act, which prioritizes timely quantum-resistant encryption of sensitive information to prevent criminals from stealing current data and reusing future quantum data computer to decrypt.
Therefore, scientists believe that the realization of quantum-secure communication networks is one of the most important technological frontiers of the 21st century.
Key distribution is an essential part of most internet security, and quantum technology can help provide better defenses against hackers. In quantum key distribution, a quantum-secure protocol is used to distribute encrypted digital keys between parties transmitting communication-sensitive data. Quantum keys are transmitted by photons through an optical fiber network, using the quantum properties of photons to encode the qubits that make up the key. This kind of unbreakable communication has application value in many fields, including finance, defense and other industries.
“We are excited to continue our collaboration with the Chicago Quantum Exchange as this QKD network trial unfolds,” said Yasushi Kawakura, vice president of digital solutions at Toshiba. the quantum threat."
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