![]() ![]() PDF/A is an ISO standard for long-term preservation, these files are primarily used for archiving. If no passwords are set by the author of the document, there are no restrictions to open the PDF file and the user has the full access to the PDF file. If the author of the PDF file wants to set the Open password (for opening the PDF document or to restrict some features), the Owner password must be set first. So, the Owner password grants full access to the PDF file. ![]() If no Open password is set, a PDF viewer opens the PDF file with user privileges without asking for a password.Ī PDF viewer asks for the Owner password when the user tries to use restricted features (usually printing or copying). The Open password causes the file to be opened with user privileges and only non-restricted features of the PDF file can be used. If an Open password is set, the PDF file cannot be opened without entering the Open password. PDF files support two different passwords - Open password and Owner password. (If the PDF file is password protected, the owner password of the PDF file must be supplied to digitally sign the PDF file). pfx) format with up to 4096 bits encrypted private/public key pairs are supported Because of this, it is always possible to check whether a document has been changed or not. Once a PDF file was digitally signed, it is impossible to change the file without invalidating the signature. The signature stores information about the signer and the state of the document when it was signed. Digitally sign PDF files with document signing certificatesĪ digital signature can be used to authenticate the identity of the author and the contents of the PDF document.(If the PDF file is password protected, the owner password of the PDF file must be supplied to edit access permissions of the PDF file.) Setting access permissions of PDF files.The application is fully macOS 13 Ventura compatible, native Apple Silicon architecture of new Macs is supported. Processing of a single file or batch processing of multiple files is supported. Supported PDF documents: PDF, PDF/A and PDF/X unprotected and password-protected files (if the PDF file is password protected, the open or owner password of the PDF file must be supplied to open the file). Digitally sign PDF files with document signing certificates. Professional tool for editing metadata, file attributes and access permissions of PDF files. ![]()
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