ABB 3BHE020356R0101 GF D233A module
Technical data of product parameters
3BHE020356R0101 GF D233A standard security handler allows access permissions and up to two
passwords to be specified for a document: an owner password and a user
password. An application’s decision to encrypt a document is based on whether
the user creating the document specifies any passwords or access restrictions 3BHE020356R0101 GF D233A
example, in a security settings dialog box that the user can invoke before saving
the PDF file). If so, the document is encrypted, and the permissions and
information required to validate the passwords are stored in the encryption
dictionary. (An application may also create an encrypted document without any
user interaction if it has some other source of information about what passwords
and 3BHE020356R0101 GF D233A
If a user attempts to open an encrypted document that has a user password, the
application should prompt for a password. Correctly supplying either password
enables the user to open the document, decrypt it, and display it on the screen. If
the document does not have a user password, no password is requested; the
application can simply open, decrypt, and display the document. Whether
additional operations are allowed on a decrypted document depends on which
password (if any) was supplied when the document was opened and on any
access restrictions that were specified when the document was created:
• Opening the document with the correct owner password (assuming it is not the
same as the user password) allows full (owner) access to the document. Thisunlimited access includes the ability to change the document’s passwords and3BHE020356R0101 GF D233A
access permissions.
• Opening the document with the correct user password (or opening a document that does not have a user password) allows additional operations to be
performed according to the user access permissions specified in the document’s encryption dictionary. 3BHE020356R0101 GF D233A
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reminder
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