- Training
- Training Live Events
- Training Without Travel
- SANS Courses
- Certified Instructors
- Career Roadmap
- Training Calendars
- SANS @Home
- SANS OnDemand
- Community SANS
- SANS Mentor Program
- SANS Onsite
- SANS SelfStudy
- SANS Partnership Series
- SANS Workshop Series
- Webcasts
- Work Study
- Events Archive
- DoD 8570
- Voucher Credit Program
- group discounts
- Certification
- Resources
- Vendor
- Portal
- Storm Center
- College
- Developer
- About
the most trusted source for computer security training, certification and research
The GSM Standard (An overview of its security)
- Abstract
- Global System for Mobile Communications (GSM) is the most popular mobile phone system in the world, accounting for 70% of the world's digital mobile phones. According to a press release by the GSM Association in May 2001, there are more than half a billion GSM mobile phones in use in over 168 countries today. The phenomenal success in mobile telecommunications is due in large to GSM. One of its key strength is its international roaming capability, giving consumers a seamless service in over 168 countries.