What is the specific function of dongle???
"Dongle" is a kind of encryption product which is a combination of software and hardware inserted in the parallel port of computer (the new dongle also has USB port). Generally, there are dozens or hundreds of bytes of nonvolatile storage space for reading and writing, and now the newer dog also contains a single chip microcomputer. Software developers can exchange data with softdog through interface function (that is, read and write softdog) to check whether the softdog is inserted in the interface; Or directly use the tool attached to the softdog to encrypt your own EXE file (commonly known as "shell"). In this way, software developers can set multiple software locks in the software, and use the softdog as the key to open these locks; If the softdog is not inserted or does not correspond, the software will not run normally.
The main function of the dongle is to protect the software from piracy. There is a certain storage space, which can store some data or code. When the program is running, it reads the data in the dongle to determine whether it is a legal user. Because access to the dongle requires a password, there is no need to worry that the data in the dongle will be illegally read and copied.
Now there are about ten brands of dongles on the market. Rainbow dongle is one of the earliest brands in the industry. Its headquarters is in the United States, and its company name is SafeNet. There are dozens of agents in China. Guangzhou weisai Computer Co., Ltd. is a professional company in South China.