. Everyone knows that the EFS encryption method brought by Windows 2000/XP/2003 is very high (there is no cracking method so far), but the partition must be NTFS partition, and Windows 98/This encryption is not available for operating systems such as me. This article will introduce you to a very popular encryption software abroad: PGP. The software uses a high-intensity encryption method similar to EFS, which encrypts any file on the hard disk and encrypts and signs emails. It is very powerful. Let's take a look at how to use it to encrypt files. First, the software installation PGP installation is very simple, run the installer, under the "User Type" page (Figure 1) need to make a choice according to your actual situation: if you have used PGP, and exported Your key, then you can choose "Yes, I already have keyrings" and import your key here; if you are using PGP for the first time, you need to apply for a key. So here is "No, I'm a new user" (no, I am a new user). Then the installer will ask you which software support components to install (Figure 2), only those who charge users can use these features, I suggest you do not choose anything, and then click Next to complete the installation. The system will need to be restarted after the program is installed. 500)this.width=500"> 500)this.width=500"> Second, the software uses After the restart, the program will ask for the registration code, click the "Later" button to skip this step. Then the Key Generation Wizard appears. Click Next on the wizard to start. You will first need to enter your name and email address. If you plan to use PGP encryption or sign up for email, then it is recommended to use real information so that others can easily identify this as your public key. If you just think of it as a normal encryption software, just type it. Then click Next, you need to enter the password and confirm the password in the upper and lower dialog boxes (Figure 3). It should be noted here that if your private key is lost, it will not necessarily cause damage, because the private key is protected by the password entered here. To use your private key, you also need to know your password at the same time. This is a double. Insurance measures. 500)this.width=500"> Tip: The key in PGP is divided into two parts, public key and private key, which are in pairs, so they are generally called key pairs. Usually, encrypted files need to be The public key is used, and the decryption file needs to use the corresponding private key. It can be understood as a key and a lock. Each lock has a matching key, the public key is a lock, and the private key is a key. If you want to open a lock , you must use the corresponding key. Therefore, after you create your own key using PGP, these keys must be kept, especially the private key. If you use PGP to encrypt the file, you accidentally lost it. Your own private key, then your file will never be decrypted. Then PGP will automatically generate the key. After completion, the system tray in the lower right corner of the desktop has a lock-shaped PGP icon, right click on the icon pop-up menu (such as Figure 4), select "Options", we make some settings for PGP. 500)this.width=500"> The "File" tab shows the location where your public and private keys are saved. Under identify key case files are saved in "My Documents" folder. Tip: To prevent the key from being lost when the system crashes, it is recommended that you click the “Browse” button to transfer the default save location of the public and private keys to other hard disk partitions. Third, encrypt the file Suppose you have an important file in your hand that needs to be encrypted. Only you and your friends can open. First of all, your friend must send out the public key generated by his PGP to you. Import and export key Click the right mouse button on the PGP lock chart in the lower right corner of the desktop, and click “PGPkeys” on the pop-up menu to open the key window (Figure 5). Here we can complete the export and import of the public key. . 500)this.width=500"> which is displayed in bold, and in the "Description" column is "Key pair" is your own key, if you want to export your own public key (Remember that the private key can't be given to anyone), right-click on the key, then click on "Send to" in the context menu and select "Mail RecipIEnt" After a while, the system will automatically open the default email program and add the public key as an attachment to the email. This will send the public key to others. After the public receives the public key, double-click the email directly. Attach and click on the “Import” button in the window that appears. Open Windows Explorer, right click on the file or folder you want to encrypt, and select “Encrypt” under the “PGP” menu. Encryption)" The dialog box shown in Figure 6 will appear. The above window shows all the public keys saved on the hard disk. The public key of the person you want to decrypt this file from Drag the window to the window below, then click OK to complete the encryption. 500)this.width=500"> There are also a few points in the options below the dialog. "Wipe Original" can be After the file encryption is completed, the original unencrypted file is completely deleted. This deletion can not be recovered by using the anti-deletion software; "Conventional Encryption" will abandon the use of the public key to encrypt the file, using only the password you enter later. Encryption; "Self Decrypting Archive" will create an executable file. If the encrypted file needs to be opened on a computer without PGP installed, you can select this option to generate an executable file. Double-click this file to Decrypt directly after entering the password. However, be aware that self-decrypting files generated on the Windows platform can only be opened on Windows platforms. If you need to decrypt in the future, just double-click the file generated after encryption, then select your private key and enter the password. However, be aware that your own key must be kept safe!