Encrypt your word document,support doc,docx,rtf;One Computer,One Password, you only need to encrypt files one time,Protect the distribution of your word document,No editing,No copying,No printing,stronger than the MS office's own encryption.
When a user wants to open an encrypted file, the encrypted file will pop up a dialog box to
request the user to enter a Read Password. This dialog box will display the machine ID of the user's computer. The user can send his/her own machine ID to you, and you can create a Read Password based on the user's machine ID. After that the user can use this Read Password to open your file on his/her computer. Since the Read Password is created based on the user's machine ID, the user will not be able to share the Read Password with other users, the user will not be able to re-distribute your files;
It can be specified whether free trial preview is provided;
You can configure a user prompt so as to let users know how to contact you to obtain the Read Password;
More information from program website