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In recent years, the spy drama has been soaring in China's screen. It has captured the intelligence and deciphered passwords, and the stories of wits and fights have attracted countless audiences. However, many people do not know that with the development of quantum information technology, password communication is ushering in epoch-making changes, and a password that can never be deciphered will enter the stage of military struggle in the near future.
Quantum cryptography ensures "unbreakable" security by hiding information in light particles or photons emitted from a laser. In this cryptographic form, quantum mechanics is used to randomly generate a key.
In this era of cyber attacks and electronic surveillance everywhere, China’s quantum science experimental satellites will permanently change cryptography and effectively solve the communication security problems that countries have racked their brains. After the completion of the quantum communication network, China can achieve the goal of quantum communication in any two places on the ground.
Quantum information is considered a fundamental and strategic issue that may change the world’s next-generation communications and computer technologies. The most typical feature of quantum communication that distinguishes existing communication is its unmatched security.
The inseparability of single photons and the non-replicability of quantum states ensure that information is not eavesdropping and cannot be cracked. Based on the basic principle of quantum physics, quantum communication can ensure unconditional security such as identity authentication, transmission encryption, and digital signature, and it can achieve the goal of fundamentally and permanently solving information security problems.
In the highly developed information age of the information network, people’s dependence on modern communications has gradually increased, but the continuous eavesdropping and monitoring incidents have caused people to have headaches for modern communications without security. The Snowden incident has made the whole world realize that in the face of modern communication stealing technology, everyone has become a “transparent person†without privacy, and the safe and convenient communication technology has become the common hope of everyone.
As we all know, most of the current technical standards in the field of communications are set by the United States and other Western countries. Most of the core technologies are in the hands of Western countries. In the existing communication system, China has basically no right to speak. Not only has a large amount of profits been taken away by Western companies, but also the security of communications related to the country's core interests cannot be guaranteed.
China’s Quantum Science Experiment Satellite will permanently change cryptography and effectively crack down on the communication security problems that are plagued by various countries. After the completion of the quantum communication network, China can achieve the goal of quantum communication in any two places on the ground. By then, China can not only get rid of the dilemma of security in the communications field, but also can install a powerful “security lock†for important national communications, discover potential cyber attacks in real time, and help China create an indestructible communications network. Ensure that China firmly grasps the information security initiative.
Bernard, the founder of the sociology of science, once said: "Science and war have always been extremely closely linked.
The American media even believes that “maybe not many people think that the Chinese military might surpass the United States in the next 10 to 20 years, but the competition for military power is dynamic, especially if it depends on the development of new technologies, if the People’s Liberation Army will use light quantum communication technology. With a large area of ​​promotion and actual combat, the US's advantage will be greatly reduced."
China will launch human first quantum communications test satellite in July, which means that China will have the ability to cover the world with quantum communications before Europe and the United States. How important the military and strategic significance behind it is, we can all imagine.
Aluminium foil (or Aluminum Foil), often referred to with the misnomer tin foil, is aluminium prepared in thinmetal leaves with a thickness less than 0.2 mm (7.9 mils); thinner gauges down to 6 micrometres (0.24 mils) are also commonly used.
Aluminium foil is produced by rolling sheet ingots cast from molten billet aluminium, then re-rolling on sheet and foil rolling mills to the desired thickness, or by continuously casting and cold rolling. To maintain a constant thickness in aluminium foil production, beta radiation is passed through the foil to a sensor on the other side. If the intensity becomes too high, then the rollers adjust, increasing the thickness. If the intensities become too low and the foil has become too thick, the rollers apply more pressure, causing the foil to be made thinner.
Aluminium is used for packaging as it is highly malleable and can be easily converted to thin sheets and can be easily folded, rolled and packed.it is also used broadly in food and pharmaceutical packaging. The purpose of aluminium is to make long-life packs (aseptic packaging) for drinks and dairy goods, which allows storing without refrigeration. Aluminium foil containers and trays are used to bake pies and to pack takeaway meals, ready snacks and long life pet foods.
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