VL6522c/VL5522c/VL4522c 7-57.3 Encrypting PDF document and adding digital signature 77.3 Encrypting PDF document and adding digital signatureSelecting [PDF] or [Compact PDF] as a file type when distributing a scanned document or document savedin a User Box allows you to enhance security for the PDF document by encrypting it using a password or thedigital ID of a user (public key).When a device certificate is registered in the MFP, a PDF document can be distributed with a digital signatureadded. Adding a digital signature certifies the author (MFP) of the sent document and guarantees that thedocument has not been modified after being signed.Reference- Using Web Connection, you can encrypt and add a digital signature to send a document in a User Boxto another device in the PDF format.- To add a digital signature, it is necessary to encrypt the PDF document using a password or digital ID.7.3.1 Password-based encryptionTo encrypt a document using a password, configure the following settings.Item Description[Encryption Target] Select an encryption target.Selecting [Other than Metadata] excludes the item specified in [PDF DocumentProperties] from the encryption target.Selecting [Other than Metadata] does not allow you to select [Low Level] forEncryption Level.[Encryption Type] Select [Password].[Signature] When a device certificate has been registered in the MFP, specify whether toadd a digital signature.For details on registering a device certificate in the MFP, refer to the [User'sGuide Network Administrator].[Encryption Level] Select an encryption level.• [Low Level]: RC4 encoding method (40-bit key length), supported by Acro-bat 3.0 or later• [High Level 1]: RC4 encoding method (128-bit key length), supported byAcrobat 5.0 or later• [High Level 2]: AES encoding method (128-bit key length), supported byAcrobat 7.0 or later[Password] Enter the password required to open a PDF document.Enter the password twice for confirmation.[Document Permis-sions]Enter the password required to change the document permissions. Enter thepassword twice for confirmation. You cannot use the same password as thatspecified in [Password].After you have configured document permissions, press [Detail Settings] toconfigure the detailed permission settings. The set values vary depending onthe encryption level.
