Specifications

FILE AUTHENTICATION
Introduction to File Authentication
88 VX 520 REFERENCE GUIDE
Figure 30 illustrates the certificate trees in development and deployment
terminals.
Figure 30 Certificate Trees in Development and Deployment Terminals
Permanency of the Certificate Tree
The data contained in a digital certificate is stored in the terminal’s certificate tree
when the certificate is authenticated, and the certificate file itself is erased from
RAM.
The certificate tree file is stored in a reserved area of non-volatile memory and is
therefore relatively permanent. New certificate data can be added to the existing
certificate tree (up to a maximum of 21 certificates).
Required Inputs to the File Signing Process
The required inputs to the file signing process are somewhat different for
development terminals than deployment terminals. The significant differences are
shown in Table 13.
ROOT
OPERATING
SYSTEM
APPLICATION
PARTITION
SPONSOR
CERTIFICATE
(VALIDATED
BY THE
APPLICATION
PARTITION
CERTIFICATE)
ROOT
SIGNER
CERTIFICATE
(VALIDATED BY
THE SPONSOR
CERTIFICATE)
APPLICATION
PARTITION
SPONSOR
CERTIFICATE
(VALIDATED
BY THE
APPLICATION
PARTITION
CERTIFICATE)
SIGNER
CERTIFICATE
(VALIDATED BY
THE SPONSOR
CERTIFICATE)
VERIFONE
PARTITION
OPERATING
SYSTEM
VERIFONE
PARTITION
DEVELOPMENT TERMINAL DEPLOYMENT TERMINAL