加密狗是外形酷似U盘的一种硬件设备，又名加密锁，是一个软件保护的通俗行业名词，插在计算机USB口或者并行口上的软硬件结合的加密产品。那你知道加密狗为什么一定要插在主机后面吗？下面
浙大中控加密狗厂家为你分析：
The dongle is a hardware device that looks like a USB flash drive, also known as an encryption lock, and is a popular industry term for software protection. It is a combination of software and hardware that plugs into a computer's USB port or parallel port. Do you know why the dongle must be inserted behind the host? The following is an analysis by the manufacturer of Zhejiang University's Zhongkong dongle:
加密狗其目的是通过对软件与数据的保护防止知识产权被非法使用。当然这只是它本身的属性，还有隐藏属性，那就是通过安装包安装的软件只是试用的，有了加密狗就不同了，那就是正式了。加密狗可以保护的编程语言是随着计算机的硬件及操作系统的发展而不断变化的。
The purpose of the dongle is to prevent the illegal use of intellectual property rights through the protection of software and data. Of course, this is only its own attribute, and there are hidden attributes. That is, the software installed through the installation package is only for trial use. With a dongle, it is different, and that is official. The programming languages that dongles can protect are constantly changing with the development of computer hardware and operating systems.
主机的USB接口分为前后，前面的USB口是通过接线插在主板上，电压低且不稳定，后面的USB口是直接焊接在主板上，较为稳定。为了保护加密狗不被人为损坏，为了保障软件正常运行，请将加密狗插在主机后面的USB口，即使将加密狗拔下来也要小心保管。
The USB interface of the host is divided into front and rear. The front USB port is plugged into the main board through wiring, with low voltage and instability. The rear USB port is directly welded to the main board, which is relatively stable. To protect the dongle from human damage and ensure the normal operation of the software, please plug the dongle into the USB port on the back of the host, and even if you unplug the dongle, be careful to keep it.
加密狗可以随身携带，简单方便，即插即用，员工和财务只有在授权的情况下才可以登陆系统。给财务管理和内部管理带来了可靠和方便。
The encryption dog can be carried around, simple and convenient, and plug and play. Employees and finance personnel can only log in to the system with authorization. It brings reliability and convenience to financial management and internal management.
如果您的机器或者局域网不小心中了木马，您的后台帐号就随时可能被嗅探或截取，但黑客因为没有硬件狗无法进行后台登陆。所以即使您的帐号密码不慎被盗取，只要他没有加密狗，就很难实现异地登陆您的后台，也很难操纵您的机器进行后台登陆。
If your machine or LAN is accidentally hit by a Trojan, your background account may be sniffed or intercepted at any time, but a hacker cannot log in to the background without a hardware dog. Therefore, even if your account password is accidentally stolen, as long as it does not have a dongle, it is difficult to achieve remote login to your background, and it is also difficult to manipulate your machine for background login.
受保护的软件与“加密狗”之间形成一一对应的关系，被保护的软件在运行过程中不断通过API（应用程序接口）函数向“加密狗”发出指令来判断“加密狗”是否存在。如判断为不存在，则软件无法运行。
There is a one-to-one correspondence between the protected software and the "dongle". During operation, the protected software continuously sends instructions to the "dongle" through API (Application Program Interface) functions to determine whether the "dongle" exists. If it is determined that it does not exist, the software cannot run.
It can be plugged directly into the USB interface of the computer. Each dog has an independent product identification code and an independent new encryption algorithm. When logging on to the platform, users are allowed to log on normally only after detecting a specific encryption dog and accurate physical verification. For more information, please visit our website at http://www.sdjkyqyb.com!
