GSM Security

Introduction

In a GSM PLMN, both the users and the network operator have to be protected against undesirable
intrusion by third parties. To achieve this, the GSM recommendations describe three areas where
security measures have been implemented. These include:
· Authorising network access (authentication)
· Protecting user identity confidentiality (use of temporary identities)
· Protecting user data confidentiality (use of encryption)
· Protection of network signalling information