Implementation of an Instant Messaging Client using the OMA IMPS Protocol

This thesis covers the area of instant messaging. Some of the bigger commercial clients are discussed in respect to their protocol and capabilities. One of the goals of the report is to create an instant messaging client that implements the Instant Messaging and Presence Service, IMPS, protocol developed by the organization Open Mobile Alliance, OMA. The OMA IMPS protocol is released as an open standard, therefore free for everyone to implement. The client is implemented using Java with the configuration Connected Limited Device Configuration, CLDC, and the profile Mobile Information Device Protocol, MIDP. Connection to Internet or other data network is made through the, in java built-in, data connections. The client should be able to run on a mobile terminal and therefore it is required to use limited amount of working memory, storage space and processor cycles. In this thesis, there is also a discussion over security issues in instant messaging environments. One of the major problems with OMA IMPS is that the syste