Digital Signature - ScanSoft PDF CONVERTER PROFESSIONAL 3-HELP Online Help Manual

4. Click the checkbox
overlay, if you want to put the shorter file e.g. a logo on each page of a longer
document. If you do not select this option, the shorter file will be overlaid only on
the first page of the longer document.

Digital Signature

PDF Converter Professional uses industrial standard Public-Private Keys to digitally
sign documents to prevent illegal modification or piracy. Essentially, you create a key
pair– a Public Key and a Private Key first; you keep the Private Key safely while
sending the Public Keys to others.
Important: Data encrypted by the private key can only be decrypted by the public
key, and vice versa.
Sign a document using a Private Key: Since only you own the Private key (used to
sign the document), and if your public key (distributed to the public) can decrypt the
file successfully, then it can be sure the file is signed by your Private key – in other
words by you. Once signed with the private key, any modification of the document
will break the seal.
Encrypt a document using a Public Key: You may also send a private document to
a friend (encrypting the document with your friend's public key) so that no-one else
can read it.
Undo-Redo
You have an unlimited number of Undo/Redo capabilities.
Click the buttons to undo or redo any editing steps. You may also undo or redo any
particular step in the sequence.
Repeat last page of the shorter document for page
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