| A3 | Authentication Algorithm |
| A5 | Ciphering Algorithm |
| A8 | Ciphering Key Generating Algorithm |
| ADMF | Administrative Function |
| AoC | Advice of Charge |
| AUC | Authentication Center |
| AKA | Authentication and Key Agreement |
| AN | Access Network |
| BSC | Base Station Controller |
| BSS | Base Station System |
| BSSAP | Base Station Subsystem Application Part |
| BTS | Base Tranceiver Station |
| CAMEL | Customized Application for Mobile Enhanced Logic |
| CBC | Cipher Block Chaining |
| CC | Content of Communication |
| CCBS | Customer Care and Billing System |
| CDMA | CDMA Division Multiple Access |
| CDR | Call Data Record |
| CEIR | Central Equipment Identity Register |
| CEPT | European Conference of Post and Telecommunication Administrations |
| CFB | Cipher Feedback |
| CGI | Cell Global Identity |
| CKSN | Cipher Key Sequence Number |
| CMEA | Cellular Message Encryption Algorithm |
| CUG | Closed User Group |
| DIMSI | Dual International Mobile Subscriber Identity |
| DES | Data Encryption Standard |
| DSA | Digital Signature Algorithm |
| ECB | Electronic Code Book |
| EIR | Equipment Identity Register |
| EDGE | Enhanced Data GSM Environment |
| EIR | Equipment Identity Register |
| EMS | Enhanced Messaging Service |
| ETSI | European Telecommunications Standards Institute |
| GERAN | GSM EDGE Radio Access Network |
| GIWU | GSM Interworking Unit |
| GMSC | Gateway Mobile Services Switching Center |
| GMSK | Gaussian Minimum Shift Keying |
| GPRS | General Packet Radio System |
| GSM | Global System for Mobile communication |
| GTT | Global Title Translation |
| HCSD | High-Speed Circuit-Switched Data |
| HE | Home Environment |
| HLR | Home Location Register |
| IMEI | International Mobile Equipment Identifier |
| IMSI | International Mobile Subscriber Identity |
| IN | Intelligent Network |
| INAP | Intelligent Network Application Part |
| IRI | Intercept Related Information |
| ISAAC | Internet Security, Applications, Authentication and Cryptography group at the University of California, Berkeley |
| Kc | Ciphering Key |
| Ki | Individual Subscriber Authentication Key |
| LA | Location Area |
| LAI | Location Area Identity |
| LEA | Law Enforcement Agency |
| LFSR | Linear Feedback Shift Register |
| LI | Lawful Interception |
| LPC | Linear Predictive Coding |
| MAP | Mobile Application Part |
| MML | Man-Machine Language |
| MMS | Mobile Multimedia Services |
| MNC | Mobile Network Code |
| MoU | Memorandum of Understanding |
| MSC | Mobile Services Switching Center |
| MS | Mobile Station |
| MSE | Mobile Station Equipment |
| MSIN | Mobile Subscriber Identity Number |
| MSISDN | Mobile Subscriber ISDN |
| MSN | Mobile Service Node |
| MSRN | Mobile Station Roaming Number |
| MTP | Message Transfer Part |
| MXE | Message Center |
| MExE | Mobile Execution Environment |
| NIST | National Institute of Standards and Technology |
| NSS | Network and Switching Subsystem |
| OMC | Operations and Maintenance Center |
| OSS | Operation and Support System |
| OTA | Over The Air |
| PCS | Personal Communications Service |
| PDP | Packet Data Protocol |
| PKCS | Public Key Cryptography System |
| PLMN | Public Land Mobile Network |
| PSTN | Public Switched Telephone Network |
| RFM | Remote Files Management |
| RSA | Rivest, Shamir, Adleman |
| SAGE | Security Algorithms Group of Experts |
| SAS | Security Accreditation Scheme |
| SCI | Subscriber Controlled Input |
| SHA | Secure Hash Algorithm |
| SIM | Subscriber Identification Module |
| SMS | Short Message Service |
| SMSC | Short Message Service Center |
| SN | Serving Network |
| SO | Service Order |
| SRES | Signed Response |
| SS | Switching System |
| SS7 | Signaling System 7 |
| TCAP | Transaction Capabilities Application Part |
| TDMA | Time Division Multiple Access |
| TMSI | Temporary Mobile Subscriber Identity |
| UMTS | Universal Mobile Telecommunications Service |
| USIM | User Services Identity Module |
| VLR | Visitor Location Register |
| VMS | Voice Mail Service / Voice Messaging Service |
| WAP | Wireless Application Protocol |
Network System Architects, Inc.
