Finally, current mobile phones, SMS or USSD
messages, applications and their data are usually
without any privacy or security. With expanded
reach of their connectivity and expanded scope of
their applications, communication security becomes
more and more important issue. New financial,
medical and other mobile applications, handling
sensitive data and operations, also require extended
security of users and applications. So, the third
important requirement and trend in mobile
technologies and applications is the need for stronger
security algorithms, protocols, applications and
large—scale infrastructures that will provide
protection of users, communication messages,
applications, and their data