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End-to-end security of mobile data in GSM

This paper is an introduction to end-to-end security of mobile data in GSM. It concentrates on WAP security, which is problematic, because in addition to the fact that GSM and IP networks are not safe, WAP architecture presents an additional vulnerable point, the WAP gateway. Security requirements for end-to-end security are listed and explained. Different solutions are explained and analyzed whether they meet the given security requirements. The discussed solutions are WAP transport layer end-to-end security, two secure channels approach and a content provider using its own network access point. SignText function of WMLScript is also discussed.