password protect existing pdf without acrobat

Save ( dataDir ) Decrypt PDF File using Owner Password

RC4x128 ) dataDir = dataDir + 'Encrypt_out.pdf' // Save updated PDFĭocument. Encrypt ( 'user', 'owner', 0, CryptoAlgorithm. GetDataDir_AsposePdf_SecuritySignatures () // Open documentĭocument document = new Document ( dataDir + 'Encrypt.pdf' ) // Encrypt PDFĭocument. The following code snippet shows you how to encrypt PDF files.

Acrobat will require this password if you want to set/change permissions. Acrobat/Reader will disallow these things based on the permission settings.

The Owner password, if set, controls permissions, such as printing, editing, extracting, commenting, etc.

If it’s not correct, the document will not open. Acrobat/Reader will prompt a user to enter the user password.

The User password, if set, is what you need to provide in order to open a PDF.

Please specify different user and owner passwords while encrypting the PDF file. Finally, save the encrypted PDF file using Save method of the Document object. This enum provides different combinations of encryption algorithms and key sizes. In addition to that, you can pass any value of the CryptoAlgorithm enum. You can pass the user password, owner password, and permissions to the Encrypt method. You can use the Encrypt method of the Document object to encrypt a PDF file.

Using ( Document document = new Document ( dataDir + 'input.pdf' )) Encrypt PDF File using Different Encryption Types and Algorithms GetDataDir_AsposePdf_SecuritySignatures () // Load a source PDF file Import .// For complete examples and data files, please go to It's working fine But it wipe out all the data which is already there in my pdf after i secure pdf using below given code.Ĭode to secure PDF : import I just goolge it for the same and find a good solution given below. I want to make pdf file password protected.

Password protect existing pdf without acrobat