User's Manual

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File Authentication Requirements
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4 Certificates are always processed first (before signature files). The processing
routine is called one time for each certificate in the list. If a certificate is
authentic, it is noted, and the next certificate is processed. This process
continues in random order until all certificates are authenticated.
When a certificate file in the processing list is authenticated, the “Authentic”
message is displayed below the corresponding filename. If it fails to be
authenticated, the “Failed” message is displayed for five seconds and the
terminal beeps three times (see Figure 31). The routine then resumes
processing and continues until all certificates are successfully processed.
The processing routine gives both visible and audible indications if a specific
certificate authenticates successfully. The file authentication module does not
halt the process if a certificate fails to authenticate, but continues to the next
step, which is authenticating signature files.
If one or more certificates fail to authenticate, the ensuing file authentication
process based on signature files probably also fails, resulting to an application
not authenticated and not allowed to execute on the terminal.
When a certificate file is authenticated, the data it contains is added to the
certificate tree and the certificate file is deleted from the I: drive. When all
required certificates are authenticated and stored in the certificate tree, the file
authentication process for signature files can proceed.
Figure 31 Display Prompts During the File Authentication Process
5 Signature files are now processed (after certificate files). The file
authentication module calls the signature checking routine once for each new
signature file it detects. Each *.p7s file is checked as it is detected; a list is
not built and multiple processing passes are not required.