Page 8 - Security testing for USSD and STK based Digital Financial Services applications Security, Infrastructure and Trust Working Group

Abbreviations and acronyms

AuC Authentication Centre
A2P Application-to-Person
BSC Base Station Controller
BSS Base station Subsystem
BTS Base Transceiver Station
DFS Digital Financial Services
EIR Equipment Identification Register
GSM Global System for Mobile Communications
HLR Home Location Register
IMEI International Mobile Equipment Identity
IMSI International Mobile Subscriber Identity
KIc Key and algorithm Identifier for ciphering
KID Key and algorithm Identifier for Redundancy Check/CC/Digital Signature
MSC Mobile Switching Centre
MSISDN Mobile Station International Subscriber Directory Number Number.
(Note – A number used to identify a mobile phone number internationally, it includes a country code and
a National Destination Code which identifies the subscriber's operator)
MNO Mobile Network Operator
OTA Over the Air
PCB Printed Circuit Board
PCSC Personal Computer/Smart Card
PIN Personal Identification Number
SAT SIM application Toolkit
SIM Subscriber Identification Module
SMPP Short Message Peer-to-Peer Protocol
SMS Short Messaging Service
SMSC Short Message Service Centre
STK SIM Tool Kit
TAR ToolKit Application Reference
USIM Universal Subscriber Identity Module
USSD GW Unstructured Supplementary Service Data Gateway

6 Security testing for USSD and STK based Digital Financial Services applications