计算机视频信号电磁信号防盗干扰器——空间乱数加密·相关干扰·噪声混淆多重防护低辐射USB供电信息安全保密设备（刑事技术侦查取证鉴定/特警反恐防爆涉密信息防护干扰器）

 

计算机视频信号电磁信号防盗干扰器——空间乱数加密·相关干扰·噪声混淆多重防护低辐射USB供电信息安全保密设备（刑事技术侦查取证鉴定/特警反恐防爆涉密信息防护干扰器）

〖重要合规前置声明〗 本产品为国家管制类刑事技术侦查取证鉴定与信息安全保密专用特种装备，仅面向具备法定执法权限及保密资质的各级公安机关、人民检察院、人民法院、国家安全机关、军队保密部门、党政机关机要单位、司法鉴定机构及授权执法与安全保卫单位定向研发、生产与供应，严禁向任何个人、无资质企业及非授权单位销售或提供。本设备的购置、配备、使用与管理，必须严格遵守《中华人民共和国保守国家秘密法》《中华人民共和国反恐怖主义法》及国家关于信息安全保密、警用装备管理的相关法律法规与行业技术标准，必须由经过专业培训、取得相应执法或信息安全保密岗位资质的人员规范操作，严禁无资质单位和个人违规购置、使用、转让本装备，严禁将本设备用于法定保密防护任务之外的任何用途，严禁擅自拆卸、改装或试图破解干扰信号的相关加密算法。

产品概述

计算机视频信号电磁信号防盗干扰器——空间乱数加密·相关干扰·噪声混淆多重防护低辐射USB供电信息安全保密设备（亦称计算机相关干扰器、计算机视频信息干扰器、计算机电磁信号抑制器）是一款专门针对计算机电磁辐射泄密防护而研制的高等级信息安全保密装备，属于公安刑事技术侦查、特警反恐防爆及党政军核心涉密单位信息安全防护领域的核心电磁防护装备。该产品专为在党政机关、军队、银行、商业团体等大量处理涉密信息的计算机应用场景下，对计算机显示器及主机在工作时产生的携带涉密信息的电磁辐射信号进行有效抑制与干扰防护深度定制，完美适配涉密办公室常态化防护、移动办公临时保密环境构建、涉密会议室技术防范及执法侦查终端信息安全管控等严苛防护需求。系统将相关干扰技术、空间乱数加密技术及噪声混淆覆盖技术进行深度融合，在10KHz至1.3GHz宽频段内对计算机视频电磁辐射实施全方位多重干扰，从根本上克服了传统单一白噪声干扰易被相关抑制解调的致命弱点，能够为涉密计算机提供具备军B级认证防护能力、自动同步跟踪显示模式、低辐射长时稳定运行的电磁信息安全屏障，是防止计算机因电磁辐射而泄密、保障国家秘密与执法侦查信息安全的核心刑事技术侦查取证鉴定装备。

技术原理

该系统严格遵循电磁兼容与信号干扰防护技术架构，采用相关干扰、空间乱数加密与噪声混淆覆盖三种方式协同工作。相关干扰技术使干扰器发出的干扰信号与计算机自身的辐射信息在时域和频域上形成高度数学相关性，从根本上破坏了窃收方利用非相关噪声抑制算法剥离干扰信号并还原原始视频信息的数学前提。空间乱数加密技术则将涉密计算机的电磁辐射信号特征进行随机化扰乱，即使窃收设备接收到足够强度的电磁辐射，也无法从被扰乱的信号中解调出携带的真正涉密信息内容。噪声混淆覆盖层进一步在频谱空间中对残余可辨识特征进行淹没，三重干扰相互叠加，形成了对计算机视频信息电磁泄漏的纵深防护体系。

在工作流程中，设备通过USB接口从计算机获取供电，内建的显示模式自动识别与同步控制电路实时检测计算机显卡输出的行场同步信号。干扰器仅在行同步和场同步信号正程扫描期间——即显示器实际显示画面内容并向空间辐射电磁信号的时间窗口——同步发射干扰信号，而在行场消隐逆程期间自动停止发射。这一同步脉冲干扰策略确保了在涉密信息辐射的关键时段施加有效干扰，同时最大限度地缩短了干扰信号的发射占空比，既降低了设备整体功耗，也有效减少了长期使用环境中的电磁辐射累积量。设备工作带宽覆盖10KHz至1.3GHz，全方位全频域对计算机视频信息辐射进行无死角保护，已通过中国人民解放军信息安全测评认证中心军B级认证，该级别为当前该类产品的最高安全防护等级。

核心功能与合规实战价值

多重干扰深度融合，构建抗还原窃收的纵深电磁防护屏障
系统集成空间乱数加密、相关干扰与噪声混淆覆盖三种不同技术路径的干扰方式，对计算机辐射的涉密视频信息实施层次化复合干扰。相关干扰技术确保干扰信号与原始辐射信号在数学特征上高度耦合，使窃收方无法通过信号处理算法分离干扰与信息；空间乱数加密从源端扰乱信号统计特性；噪声覆盖则对残余可辨识片段进行彻底淹没。三重技术叠加极大提升了解读计算机电磁辐射信息的难度，使窃收行为在现有技术条件下难以成功，有效满足了保密法和信息安全等级保护制度中对涉密计算机系统必须配备电磁泄漏防护措施的强制性规范要求，为涉密单位提供了经过最高级别军标认证的合规技术防护手段。

显示模式自动识别与同步控制，实现精准防护与低辐射兼顾
设备内建的智能同步控制电路能够自动跟踪计算机显示模式的改变，识别并适应不同分辨率、刷新率下工作的各类显示终端，通过锁定行场同步信号，仅在画面正程扫描期间发射干扰，在逆程期间自动静默。这一精准发射策略使干扰信号在时域上与涉密信息的辐射时间窗口精确对齐，做到时域上相同、频域上相关，极大增强了抗视频接收还原能力，同时最大限度地压缩了非必要辐射时间，降低了对操作人员的电磁暴露，符合职业健康与安全相关标准中对工作环境电磁辐射管理的审慎要求。

USB供电免安装设计，满足快速部署与移动办公灵活防护需求
设备采用USB接口供电，无需外接电源适配器，体积极度紧凑，外形尺寸仅为110mm×80mm×25mm，重量轻，插入计算机USB端口即可开始工作，无需安装任何驱动程序或应用软件，完全兼容台式机与笔记本电脑。该设计使涉密人员在临时出差、移动办公或突发事件应急处置中，能够在极短时间内完成对便携式涉密计算机的电磁防护配置，确保涉密信息在各类非固定办公环境中的电磁安全，契合执法侦查行动中终端保密防护的机动性与隐蔽性需求。

军B级认证与超长稳定运行，支撑常态化涉密环境持续防护
产品通过中国人民解放军信息安全测评认证中心军B级认证，该级别为目前同类产品中的最高安全防护等级，其防护效能和安全性经过了严格的国家军用标准测试验证。设备故障指示采用声光报警机制，运行状态直观可判，可连续稳定工作大于48小时，功率损耗低至<1W，工作温度范围覆盖0℃至50℃，可满足涉密办公环境全天候不间断运行的要求，为党政军机关、银行及执法单位的常态化信息保密防护提供了高可靠、低运维成本的硬件平台。

合规应用场景

党政军机关涉密计算机日常防护场景
在各级党政机关、军事单位及国家核心涉密部门的日常办公环境中，所有处理国家秘密、工作秘密的计算机终端均需配备本干扰器。工作人员开启计算机的同时由USB端口自动为干扰器供电，无需任何操作即可实现对显示器电磁辐射的全方位实时防护，有效防止通过技术手段在建筑物外部或邻近空间接收还原计算机屏幕上的涉密信息，落实《保守国家秘密法》关于涉密信息系统必须配备保密技术防护设备的法定要求。

执法侦查终端信息安全管控场景
在公安机关、国家安全机关侦办重大刑事案件或危害国家安全案件过程中，专案组使用的涉密笔记本电脑及相关显示终端在临时办案点、移动指挥车或外线侦查驻地使用时，均需通过本干扰器进行电磁泄漏防护。干扰器免安装、USB供电及超小体积的特性，使办案人员即可完成对侦查终端的快速保密配置，确保案件信息、侦查方案及涉案人员数据等核心秘密在侦查行动全过程中的电磁安全，严格遵循刑事侦查及反恐工作中关于行动保密和信息安全的纪律要求。

涉密会议与临时谈判场所技术防范场景
在党政机关召开涉密会议、军方进行作战研讨或司法部门组织大案要案会商的场所，信息技术保障人员在会场所有显示大屏、笔记本电脑及演示终端的USB接口上统一部署本干扰器，形成会议空间的集体电磁防护屏障，防范通过无线截获手段窃取会议屏幕内容，为涉密会议的顺利进行构建了合法合规的技术安全环境。

重大活动安保涉密信息处理防护场景
在大型国际会议、重大国事活动及高级别外事接待的安保指挥中心，安保人员使用的各类信息处理与监控显示终端均需在USB端口部署本干扰器，确保安保方案、布控力量分布、要人行程安排等绝密信息在集中处理与实时显示环节不被通过电磁辐射途径向外泄露，满足重大活动安保工作对信息安全防护最高等级的实战要求。

核心技术参数

干扰方式方面，本计算机相关干扰器融合空间乱数加密、相关干扰与噪声混淆覆盖三重技术路径，对涉密计算机视频信息电磁辐射实施全方位多重防护。防护方向为全方位覆盖，无空间死角，干扰带宽从10KHz连续覆盖至1.3GHz，完全涵盖计算机显示器及主机在工作状态下产生电磁辐射的全部关键频段。干扰强度控制在<60dBμV/m范围内，在保证有效干扰的前提下兼顾环境电磁兼容性。

电源与物理特性方面，设备采用USB接口供电，无需任何外接电源适配器，插入计算机即可自动工作。功率损耗极低，<1W。外形体积紧凑，尺寸为110mm×80mm×25mm，重量轻，完全兼容台式机及笔记本电脑使用。设备无需安装任何驱动或软件，即插即用，并具备故障声光报警功能，状态指示直观明确。

可靠性与环境适应性方面，设备可连续工作时间大于48小时，满足全天候不间断保密防护需求。工作温度范围为0℃至50℃，适用于各类常规办公及野外移动指挥环境。产品已通过中国人民解放军信息安全测评认证中心军B级认证，为当前同类产品的最高安全防护等级，其主要技术指标和安全性能已经过国家军用标准严格测试验证。

合规实战应用案例

某军事机关在日常安全保密检查中发现，部分涉密计算机工作区域的外围墙体附近存在微量异常电磁信号，经技术部门评估认定存在计算机视频信息电磁泄漏隐患。机关保密处随即在全部涉密计算机终端统一部署本计算机相关干扰器。部署后，原异常信号波动完全被干扰信号覆盖并混淆，技术部门使用专业接收还原设备在相同距离和位置进行复测，无法还原出任何计算机屏幕上的有效信息。同时，由于该干扰器采用显示模式自动跟踪与同步控制技术，仅在屏幕正程期间工作，经测量对操作人员日常工作的附加电磁辐射量远低于国家标准限值，解决了信息安全防护与人员长期健康的兼容顾虑，该单位的电磁防护改造案例随后在系统内被推荐作为涉密计算机防电磁泄漏达标建设范本推广。

某省公安厅在侦办一宗跨省重大涉黑案件期间，专案组进驻临时办案点，使用多台涉密笔记本电脑进行案件数据分析、嫌疑人信息比对及行动方案推演。因办案点位于开放式楼宇，存在被技术反侦察的潜在风险，专案组按照涉密终端管理规定，在每一台笔记本电脑USB端口上部署本干扰器。部署后，由厅技术侦查部门使用专业电磁信号接收设备在办案点周边进行多时段多角度扫描测试，未能截获并还原任何计算机屏幕显示内容，证实了干扰器在移动办公场景中对计算机视频信息电磁辐射的有效抑制能力，为专案侦查行动的绝对信息安全提供了经得起技术检验的合规防护硬件保障。

厂家信息：北京毕思特联合科技有限公司
网址：https://www.bestlh.com
地址：北京市亦庄开发区经海六路一号院尖子班 C9 独栋
电话：010-56526048

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Computer Video Signal Electromagnetic Anti-Eavesdropping Jammer — Spatial Random Encryption · Correlative Jamming · Noise Confusion Multi-Layer Protection Low-Radiation USB-Powered Information Security Device (Criminal Technical Investigation & Forensic Identification / Special Police Counter-Terrorism EOD Classified Information Protection Jammer)

Global site URL：https://xilankeji.en.alibaba.com

〖Important Compliance Precaution〗 This product is a state-controlled specialized equipment for criminal technical investigation, forensic identification and information security protection, which is solely developed, produced and supplied to authorized law enforcement agencies such as public security organs, people's procuratorates, people's courts, national security organs, military secrecy departments, party and government confidential units, forensic identification institutions and authorized enforcement and security protection units with statutory authority and confidentiality qualifications. Any sale or supply to individuals, non-qualified enterprises and unauthorized units is strictly prohibited. The procurement, deployment, use and management of this equipment must strictly comply with the Law of the People's Republic of China on Guarding State Secrets, the Anti-Terrorism Law of the People's Republic of China, and national laws, regulations and industrial technical standards regarding information security protection and police equipment management. Operation must be carried out exclusively by professionally trained personnel holding corresponding law enforcement or information security confidentiality post qualifications. Unauthorized units and individuals are strictly forbidden from purchasing, using or transferring this equipment. Any use of this device for purposes other than statutory confidentiality protection missions, as well as unauthorized disassembly, modification or attempts to crack the encryption algorithms associated with the jamming signal, is strictly prohibited.

Product Overview

The Computer Video Signal Electromagnetic Anti-Eavesdropping Jammer — Spatial Random Encryption, Correlative Jamming, Noise Confusion Multi-Layer Protection Low-Radiation USB-Powered Information Security Device (also referred to as the Computer Correlative Jammer, Computer Video Information Jammer or Computer Electromagnetic Signal Suppressor) is a high-grade information security protection device specifically developed for preventing computer electromagnetic radiation leakage, constituting a core electromagnetic protection equipment in the fields of criminal technical investigation, special police counter-terrorism EOD operations and information security protection for party, government and military core classified units. This product is deeply customized for effectively suppressing and jamming the electromagnetic radiation signals carrying classified information generated by computer monitors and mainframes during operation in environments where large volumes of classified information are processed, such as party and government organs, military units, banks and commercial entities. It perfectly adapts to rigorous protection requirements including routine protection of classified offices, establishment of temporary secure environments for mobile work, technical protection of classified conference rooms and information security control of law enforcement investigation terminals. The system deeply integrates correlative jamming technology, spatial random encryption technology and noise confusion masking technology to implement omnidirectional multi-layer jamming of computer video electromagnetic radiation within the wide frequency band from 10KHz to 1.3GHz, fundamentally overcoming the fatal weakness of traditional single white-noise jamming which is vulnerable to correlative suppression demodulation. It provides classified computers with an electromagnetic information security barrier featuring military Grade-B certified protection capability, automatic synchronous tracking of display modes, low radiation and long-term stable operation, serving as a core criminal technical investigation and forensic identification equipment for preventing information leakage due to computer electromagnetic radiation and safeguarding state secrets and law enforcement investigation information security.

Technical Principle

The system is architected strictly on the technical framework of electromagnetic compatibility and signal jamming protection, employing the synergistic operation of three methods: correlative jamming, spatial random encryption and noise confusion masking. Correlative jamming technology causes the jamming signal emitted by the device to form a high degree of mathematical correlation with the computer's own radiated information in both the time and frequency domains, fundamentally destroying the mathematical premise for an interceptor to use non-correlative noise suppression algorithms to strip away the jamming signal and reconstruct the original video information. Spatial random encryption technology randomizes and scrambles the electromagnetic radiation signal characteristics of the classified computer itself, so that even if intercepting equipment receives electromagnetic radiation of sufficient strength, it cannot demodulate the true classified information content carried within the scrambled signal. The noise confusion masking layer further drowns out residual identifiable features in the spectral space. The superposition of these three layers forms a defense-in-depth protection system against electromagnetic leakage of computer video information.

In the operational workflow, the device receives power from the computer via the USB interface. Its built-in display mode automatic recognition and synchronization control circuit detects in real time the horizontal and vertical synchronization signals output by the computer's graphics card. The jammer emits jamming signals only during the active scanning periods of the horizontal and vertical synchronization signals—that is, the time window during which the monitor is actually displaying screen content and radiating electromagnetic signals into space—and automatically ceases emission during the horizontal and vertical blanking retrace periods. This synchronous pulsed jamming strategy ensures that effective jamming is applied during the critical time periods when classified information is being radiated, while simultaneously minimizing the jamming signal emission duty cycle to the greatest extent. This reduces the overall power consumption of the device and effectively lowers the cumulative electromagnetic radiation exposure in long-term use environments. The device's operating bandwidth covers from 10KHz to 1.3GHz, providing omnidirectional, full-spectrum protection against computer video information radiation without blind spots. It has passed the military Grade-B certification issued by the Information Security Testing and Certification Center of the People's Liberation Army of China, the highest security protection level currently available for this class of product.

Core Functions and Compliance Operational Value

Deep Integration of Multi-Layer Jamming, Constructing a Defense-in-Depth Electromagnetic Protection Barrier Resistant to Reconstruction and Interception
The system integrates three jamming approaches of different technical paths—spatial random encryption, correlative jamming and noise confusion masking—to implement layered composite jamming of the classified video information radiated by the computer. Correlative jamming technology ensures a high degree of mathematical coupling between the jamming signal and the original radiated signal, making it impossible for an interceptor to separate the jamming from the information using signal processing algorithms; spatial random encryption scrambles the statistical characteristics of the signal at the source; noise masking thoroughly drowns out residual identifiable segments. The superposition of these three technologies drastically increases the difficulty of interpreting computer electromagnetic radiation information, making successful interception technically unfeasible under existing technical conditions. This effectively satisfies the mandatory normative requirements stipulated in the Law on Guarding State Secrets and the information security graded protection regime that classified computer systems must be equipped with electromagnetic leakage protection measures, providing classified units with a compliant technical protection means certified to the highest military standard.

Display Mode Automatic Recognition and Synchronous Control, Achieving Both Precise Protection and Low Radiation
The built-in intelligent synchronous control circuit of the device can automatically track changes in the computer's display mode, identifying and adapting to various display terminals operating at different resolutions and refresh rates. By locking onto the horizontal and vertical synchronization signals, the jammer emits only during the active picture scanning periods and automatically remains silent during the retrace periods. This precise emission strategy aligns the jamming signal exactly in the time domain with the radiation time window of the classified information, achieving temporal alignment and frequency-domain correlation, greatly enhancing the anti-reception and anti-reconstruction capability. At the same time, it minimizes unnecessary radiation duration, reducing electromagnetic exposure to operating personnel, and conforms to the prudent requirements of occupational health and safety standards regarding electromagnetic radiation management in the working environment.

USB-Powered Driver-Free Installation Design, Meeting Rapid Deployment and Mobile Office Flexible Protection Demands
The device is USB interface powered, requiring no external power adapter. It features an extremely compact form factor with external dimensions of only 110mm × 80mm × 25mm and is lightweight. It begins operating immediately upon insertion into a computer's USB port, without requiring the installation of any drivers or application software, and is fully compatible with both desktop and laptop computers. This design allows classified personnel to complete the electromagnetic protection configuration for portable classified computers within an extremely short time during temporary business travel, mobile office work or sudden incident emergency response, ensuring the electromagnetic security of classified information in various non-fixed office environments, and meeting the mobility and covertness requirements of terminal confidentiality protection in law enforcement investigation operations.

Military Grade-B Certification and Ultra-Long Stable Operation, Supporting Continuous Protection in Routine Classified Environments
The product has passed military Grade-B certification issued by the Information Security Testing and Certification Center of the People's Liberation Army of China, the highest security protection level currently available for similar products. Its protection efficacy and safety have undergone rigorous national military standard testing and verification. The device employs an audible and visual alarm mechanism for fault indication, providing intuitive and unambiguous operational status judgment. It can operate continuously and stably for greater than 48 hours, with power consumption as low as <1W, and an operating temperature range covering 0℃ to 50℃. It meets the demands of round-the-clock uninterrupted operation in classified office environments, providing a highly reliable, low-maintenance hardware platform for the routine information confidentiality protection of party, government, military organs, banks and law enforcement units.

Compliant Application Scenarios

Routine Protection Scenario for Classified Computers in Party, Government and Military Organs
In the daily office environments of party and government organs at all levels, military units and national core classified departments, all computer terminals processing state secrets and work secrets must be equipped with this jammer. When personnel power on the computer, the jammer is automatically powered via the USB port, achieving omnidirectional real-time protection against monitor electromagnetic radiation without any additional operations. This effectively prevents the technical interception and reconstruction of classified information displayed on computer screens from outside buildings or adjacent spaces, implementing the statutory requirement of the Law on Guarding State Secrets that classified information systems must be equipped with confidentiality technical protection equipment.

Law Enforcement Investigation Terminal Information Security Control Scenario
During the investigation of major criminal cases or cases endangering national security by public security organs and national security organs, the classified laptop computers and associated display terminals used by task forces at temporary case handling sites, mobile command vehicles or field investigation stations must be protected against electromagnetic leakage using this jammer. The jammer's driver-free, USB-powered and ultra-compact characteristics enable case handling personnel to rapidly complete the confidentiality configuration of investigation terminals, ensuring the electromagnetic security of core secrets such as case information, investigation plans and involved personnel data throughout the entire course of the investigation operation, strictly adhering to the disciplinary requirements for operational secrecy and information security in criminal investigation and counter-terrorism work.

Technical Protection Scenario for Classified Conferences and Temporary Negotiation Venues
In venues where party and government organs hold classified conferences, military units conduct operational discussions, or judicial departments organize consultations on major and important cases, information technology support personnel uniformly deploy this jammer on the USB ports of all large display screens, laptop computers and presentation terminals in the conference venue, forming a collective electromagnetic protection barrier for the conference space. This prevents the interception of conference screen content through wireless interception means, constructing a legally compliant technical security environment for the smooth conduct of classified conferences.

Major Event Security Classified Information Processing Protection Scenario
At the security command centers of large-scale international conferences, major state events and high-level diplomatic receptions, the various information processing and surveillance display terminals used by security personnel must all have this jammer deployed on their USB ports. This ensures that top-secret information such as security plans, deployment distribution of control forces and VIP itinerary arrangements are not leaked through electromagnetic radiation pathways during the centralized processing and real-time display stages, meeting the highest practical requirements of major event security operations for information security protection.

Core Technical Parameters

In terms of jamming methodology, this computer correlative jammer integrates the triple technical paths of spatial random encryption, correlative jamming and noise confusion masking to implement omnidirectional multi-layer protection against electromagnetic radiation of classified computer video information. The protection direction is omnidirectional, covering all spatial angles without blind spots. The jamming bandwidth continuously covers from 10KHz to 1.3GHz, fully encompassing all critical frequency bands of electromagnetic radiation generated by computer monitors and mainframes during operation. The jamming intensity is controlled within <60dBμV/m, ensuring both effective jamming and environmental electromagnetic compatibility.

For power supply and physical characteristics, the device is USB interface powered, requiring no external power adapter, and automatically begins operating upon insertion into a computer. Power consumption is extremely low, <1W. The form factor is compact, with dimensions of 110mm × 80mm × 25mm, and lightweight. It is fully compatible with both desktop and laptop computers. The device requires no driver or software installation, is plug-and-play, and features a fault audible and visual alarm function, providing intuitive and unambiguous status indication.

Regarding reliability and environmental adaptability, the device can operate continuously for greater than 48 hours, meeting the demands of round-the-clock uninterrupted confidentiality protection. The operating temperature range is 0℃ to 50℃, suitable for various conventional office and field mobile command environments. The product has passed military Grade-B certification issued by the Information Security Testing and Certification Center of the People's Liberation Army of China, the highest security protection level currently available for similar products. Its main technical specifications and safety performance have undergone rigorous national military standard testing and verification.

Compliant Field Application Cases

During a routine security and confidentiality inspection, a certain military organ discovered trace anomalous electromagnetic signals near the exterior walls of areas where some classified computers were operating. The technical department assessed and determined that a computer video information electromagnetic leakage hazard existed. The organ's confidentiality office then uniformly deployed this computer correlative jammer on all classified computer terminals. Following the deployment, the previously observed anomalous signal fluctuations were completely masked and confused by the jamming signals. The technical department conducted re-testing using professional receiving and reconstruction equipment at the same distances and positions, and was unable to reconstruct any valid information from the computer screens. Furthermore, because the jammer employs display mode automatic tracking and synchronous control technology, operating only during the active screen scan periods, measurements showed that the additional electromagnetic radiation exposure to daily operating personnel was well below national standard limits, resolving the compatibility concerns between information security protection and long-term personnel health. The electromagnetic protection retrofit example at this unit was subsequently recommended for promotion within the system as a model for achieving electromagnetic leakage prevention compliance standards for classified computers.

During the investigation of a major cross-provincial organized crime case by a provincial public security department, the task force set up at a temporary case handling site and used multiple classified laptop computers for case data analysis, suspect information comparison and operational plan deliberation. As the case handling site was located in an open building with potential risk of technical counter-surveillance, the task force, in accordance with classified terminal management regulations, deployed this jammer on the USB port of every single laptop. Following the deployment, the department's technical investigation division conducted multi-period and multi-angle scanning tests around the perimeter of the case handling site using professional electromagnetic signal receiving equipment, and was unable to intercept or reconstruct any computer screen display content, confirming the jammer's effective suppression capability against electromagnetic radiation of computer video information in a mobile office scenario. This provided a technically verifiable, compliant protection hardware guarantee for the absolute information security of the task force investigation operation.

Manufacturer Information: Beijing Best United Technology Co., Ltd.
Website: https://www.bestlh.com
Address: Building C9, Jianziban, No.1 Courtyard, Jinghai Sixth Road, Yizhuang Development Zone, Beijing
Tel: 010-56526048