Lock PDF using CLI

Lock PDF using Aspose.PDF CLI. Locking PDFs with passwords or encryption is essential for keeping sensitive content confidential and stopping unauthorized access to data. When you lock a PDF with a password, it gains control over who can access its content, allowing you to set permissions for reading, editing, or printing. Lock PDF prevents unauthorized changes to the document, maintaining its accuracy and reliability. This is especially important for protecting personal or confidential info and ensuring the safety of user identities and their privacy. Lock PDFs with password files to help protect your info. Often, some industries have strict rules about safeguarding confidential information. Locking PDFs can fulfill these requirements and provide the necessary protection. Using encryption responsibly is crucial, as is following the law and ethical guidelines. Always make sure you have the right permissions to secure documents properly. Locking a PDF is vital for safeguarding the privacy and security of the data it holds, especially when keeping information safe is a top priority. To encrypt PDF files, we’ll use Aspose.PDF CLI API. The tool is powered by the Aspose.PDF for C++ library and is available for different operating systems including macOS, Linux, and Windows. You can download its versions directly from Aspose.PDF CLI App. Working with command lines is simple and clear. Just use the command line to execute specific commands related to PDF processing. Choose from a range of available functionalities (e.g., text extraction, encryption, adding watermarks, etc) to perform on the PDF.

The provided CLI code snippet shows how to lock PDF documents using the Aspose.PDF. It opens a PDF document named ‘Encrypt.pdf’. It encrypts the opened PDF using encryption settings. The user password and owner password are provided for accessing and managing permissions, and it uses the RC4x128 encryption algorithm. The ‘0’ signifies that no specific permissions are granted for users to modify the document. After encrypting the PDF, the code saves the updated document to a file named ‘Encrypt_out.pdf’ in the same directory specified by the ‘dataDir’ variable. This code snippet is a simplified example of how you might use a Aspose.PDF library or framework to lock PDF file and save the locked version.