Low Level Function
1.5.3 Detect Access violations

Overview

This Function shall be capable of providing the following facilities:

(1) The ability to register all attempts to use a service without having first fulfilled the required conditions.
(2) If attempts have been made, the ability to block on the use of the service via the block access functionality and to register the offence in the store of Fraud Data.

Functional Requirements

(a) receive a fraud detection messages
(b) sends a "block" command to the "Block Access" Function
(c) send the fraud notification to the PSLE area
(d) record the offence in the store of "fraud" Data.

Diagrams

The Diagram(s) is (are) the diagram(s) where you can find the function :
  • DFD 1.5 Control Fraud
  • Functional Tree of Area 1

    • Parent Higher Level Function

    Input logical dataflows

    Output logical dataflows

    User needs

    Number

    Description

    4.1.1.3
    The system shall not do anything to reduce the safety of either the travellers in the vehicle, or the staff close to the equipment, e.g. in toll booths.
    4.1.4.2
    The system shall be able to collect evidence of unauthorised access when payment has not been received.