DFD 1.5 Control Fraud

Overview

This High-level Function shall check that the user actually is allowed to perform the required transaction.  It shall check the access rights, the presence of the user on black lists, and if no violation is detected, shall permit the transaction to take place and enable the user to continue to use the service.  The Function shall also record all the attempts to use a service without either funds or permission.

Diagrams

The Diagram(s) is(are) the Diagram(s) where you can find the function
The first diagram, if exists, is a DFD diagram which provides the context of the function The second Diagram, if exists, is a Functional Tree which provides a hierarchical description of the function into subfunctions	DFD 1 Provide Electronic Payment Facilities Functional Tree of Area 1

Parent

• 1. Provide Electronic Payment Facilities

Component lower level functions

1.5.1 Check User's rights

1.5.2 Detect Payment Violations

1.5.3 Detect Access violations

1.5.5 Block Access to Service

The Functions check users' access rights and detect payment violations, blocking access if a violation is detected. Three Data Flows enable three of these Functions to exchange data with each other. There are several other Data Flows that enable the Functions to exchange data with other parts of the Provide Electronic Payment Facilities Area, with other Areas and with the terminators. The Functions and Data Flows are contained in the DFD for Function 1.5 - DFD 1.5.

Input logical dataflows

mt.pepf_traffic_conditions

pepf_access_criteria_R

pepf_fraud_input

pepf_overdraft_notification

pepf_supplied_account

pepf_trans_fraud_input

Output logical dataflows

pepf.mt_accident_warning

pepf.psle_fraud_notification_DAV

pepf.psle_fraud_notification_DPV

pepf_fraud_output

td-pepf_fraud_detection

td-pepf_stop_command

tt-service_access_denied

User needs