Adobe 22002486 Digital Signature User Guide - Page 134
Changes in FDF Behavior
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Acrobat 9 Family of Products Security Feature User Guide Figure 95 Enhanced security: Configuration dialog External Content and Document Security Changes in FDF Behavior 134 9.1.2 Changes in FDF Behavior FDF files are data exchange files. Like .acrobatsecurity files, they help you move certificate, server, and other data from one machine to another. This data transfer usually involves some mechanism such as data injection into a PDF form field, installing files, executing a script, and so on. These actions represent a potential security risk, and in some environments that risk may be unacceptable. Enhanced Security disables some FDF functionality unless those FDF files originate from a specifically privileged file, folder, or server. Table 17 lists the high level rules defining FDF behavior. Tip: If you need to configure your environment for enhanced security or need to troubleshoot FDF workflows that may not be working as expected, see "Enhanced Security" on page 132. Table 17 Rules for opening a PDF via FDF Action FDF PDF location location 8.x behavior Opening a target PDF local local PDF opens and no authentication required. Opening a target PDF local http server PDF opens Opening a target PDF Opening a target PDF https server https server http server PDF opens and no authentication required. local Blocked 9.x behavior Same. User authorization required unless trusted via enhanced security feature. Same. Http hosted FDFs cannot open local files.