Graphics Programs Reference
In-Depth Information
A similar dialog is presented upon opening the file if the document has a non-blank
user password, as shown in
Figure 8-4
. If the password is not known, the file cannot
be opened, even for viewing.
Figure 8-4. Opening a file with a non-blank user password in Adobe Reader
Example 8-1
shows the content of our new file. See if you can spot the differences from
the standard
hello.pdf
file in
Example 2-2
.
Example 8-1. An encrypted file
%PDF-1.1
%âãÏÓ
1 0 obj
<< /Kids [2 0 R] /Type /Pages /Count 1 >>
endobj
3 0 obj
<< /Length 72 >>
stream
(72 bytes of encrypted data)
endstream