PDF Encrypter allows you to set User Password as well as Owner Password. It is a freeware PDF encryption application that's straightforward and well-designed.
Here are some screenshots to illustrate the features and user interface of this application:
Encrypt PDF files using the 40-bit or 128-bit security level, set permissions (e. Screenshot of PDF Encrypter - 680px · 472pxNot too complicated to handle. Screenshot of PDF Encrypter - 508px · 373pxPDF Encrypter: Secure your files. Screenshot of PDF Encrypter - 508px · 373px