Good way to prevent recording!Meeting room jammer

　　Since the "Prism Gate", the country and industry have gradually strengthened the importance of information security. Information security affects many areas of a country. At the beginning of 2015, the Central Network Information Group was established, and network and information security was upgraded to a national strategy. In the report of the 18th National Congress of the Communist Party of China, a total of many statements mentioned information technology and information security, and for the first time clearly put forward the goal of "sounding the information security guarantee system". China has included informatization and network information security in national development. One of its high strategic directions.

　　With the rapid development of information technology, data has become the core asset of user information, the "Prism Gate" incident continues to ferment, and both personal privacy awareness and corporate data security awareness have doubled. Data security mainly solves the problems of data-level authority management and data leakage prevention. Voice leakage is an important link.

　　"Southern People Weekly" tells a story of a man named Qi Hong who broke the wiretap of an official.

　　In 2011, he dismantled more than 300 wiretapping devices from the cars, offices or bedrooms of hundreds of officials. When it was intensive, he dismantled more than 40 devices a week. And these devices come from their wives, lovers, colleagues and opponents.

　　Skilled talent is a pass. Officials used acquaintances to find him for testing and dismantled the eavesdropping equipment. To be on the safe side or to detect an abnormality-for example, if the wife learns of a secret whereabouts, and the leader speaks "with words", they will all find Qi Hong. During a busy week, he took out more than forty.

　　"Now we all have to hug each other when we meet, and we take the opportunity to feel whether the other person is wearing equipment. It is important to talk to the bathing center," he said. This shocked the people present. In the Shandong area, such a phenomenon has never been heard before, and they all sighed with emotion—people's hearts are unreliable.

　　This official version of the "eavesdropping situation" is not only a great infringement of the privacy of others, but also reflects the current bad officialdom ecology.

　　At present, the technical routes adopted by the existing domestic and foreign recording jammers are mainly two kinds of co-frequency acoustic interference and electromagnetic radiation interference. However, co-channel sound interference directly uses audio signals for interference, which has audible noise. Users must wear headphones or make voice calls in a shielded room. This has great limitations and can only be used in some special occasions. Electromagnetic radiation interference uses radio frequency to interfere with recording equipment, which only has an effect on analog equipment, and its effect is extremely limited.

　　Ultrasonic interference, no audible sound, large coverage, good concealment, can be applied to all mainstream mobile phones and voice recorder equipment. The company's recording jammer uses a high-security encryption algorithm to generate random high-power interference signals. The frequency range of the interference signal is within the receiving range of the pickup of the recording device.

　　When the recorder conducts illegal recording, the pickup can pick up the interference signal while picking up the voice signal. The intensity of the interference signal is far greater than the voice signal, and even exceeds the large receiving power threshold of the pickup. This will form a suppressive interference to the voice signal, and even cause the pickup to fail to work properly, so that the pickup can only pick up a piece of noisy noise information. At the same time, the signal source that generates the interference signal is an encrypted random random sequence, so the original voice information cannot be restored through related technologies, and the purpose of protecting the voice information and eliminating the hidden danger of eavesdropping is achieved.

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