Red and black power supply is another name for electromagnetic leakage emission protection isolation socket, when the classified equipment is working, the high-frequency signal generated by it can leak through the power line, and the red and black power supply filter isolation device is added to the power supply circuit of the classified electronic equipment, which can effectively block and absorb the electromagnetic information leakage and emission of electronic equipment, so as to protect the safety of classified information. Therefore, classified computers, confidential intermediary machines, printers and other equipment must be equipped with red and black power isolation devices to prevent information leakage caused by conduction leakage.
Legal and regulatory requirements
In the relevant confidentiality laws and regulations and national confidentiality standards, the use of red and black isolation devices is clearly stipulated. According to the "Law of the People's Republic of China on Guarding State Secrets", "Qualification Standards for Confidentiality of Equipment Research and Production Units", "Requirements for Electromagnetic Leakage Emission Protection at the Site of Use of Classified Information Equipment" and "Technical Requirements for Graded Protection of Information Systems Involving State Secrets" and other relevant regulations
1. Confidential information equipment shall take protective measures for electromagnetic leakage emission (filtered power sockets, etc.).
2. Mobile communication devices such as mobile phones and mobile terminals are forbidden to be plugged into red and black isolated power supply devices.
3. Servers, computers, and peripheral devices (including printers, scanners, etc.) in classified information equipment should use red and black power isolation devices.
4. Equipment and products that do not meet the confidentiality security standards and requirements shall not be stored, processed or transmitted as state secrets.
Why is it called "red-black power"?
From the perspective of red and black engineering, the electromagnetic information leaked by electronic equipment can be divided into two parts: red signal and black signal. The signal that can recover useful information after being intercepted is the so-called "red signal", such as display signal, key signal, and data signal before encryption; Signals that cannot recover useful information after interception are so-called "black signals", such as power switching frequencies, various clock signals, and encrypted signals.
The main threat to information security is the red signal, and some data show that the electromagnetic waves with information radiated by the terminal of ordinary computers can be received and reproduced several hundred meters or even one kilometer away; The leakage information of information processing and transmission equipment such as ordinary printers, fax machines, and ** machines can also be intercepted and restored by specific means within a certain distance. This kind of technology for receiving and restoring electromagnetic leakage information has now become a means used by the intelligence agencies of many countries to steal important information from other countries.
Of course, the interception and restoration of electromagnetic leakage information is not unconditional, and only signals whose intensity and signal-to-noise ratio meet certain conditions can be intercepted and restored. Therefore, through the red and black power sockets, the leakage of confidential red information can be effectively filtered out, and the information security of classified computers can be effectively protected.
Precautions
The latest national secrecy standard for red and black power supply isolation devices is BMB46-2019, and the red and black power supply is a compulsory testing product of the National Confidentiality Evaluation Center, so the red and black power supply purchased by each unit must have a test certificate from the National Evaluation Center and be within the validity period.