The best way is to encrypt files and use domain intelligence software to encrypt them. Encrypted files can only be transmitted in LAN. Encrypted files can't be opened when they leave the LAN. After opening, they will only see a bunch of garbled codes.
Software encryption operation is as follows:
After opening the domain smart shield software, click Policy Template Management on the home page, click "+"to pop up a new policy template window, and fill in the policy name. Select file encryption, check the encryption function, and then click OK.
In addition to encryption, there are other functions that can also prevent leaks.
These functions are as follows:
1, u disk management. Select u disk management, set u disk, and then control u disk.
2. Print management. Select print management, and you can see a variety of operations, such as prohibiting the use of printers or only allowing printers to run.
3, peripheral management. When you choose peripheral management, you can see that there are many operations such as USB settings, prohibition of optical drive, prohibition of burning and so on. Can be checked.
4. Document security management. Select document security, and you can see operations such as file backup and program sending prohibition.