AN ENCRYPTION METHOD AND SYSTEM FOR MOBILE TELEPHONES

摘要

This invention relates to a method and system for transfer of secure messages to and from a mobile telephone. More specifically, this invention relates to a method of providing encrypted messaging on primitive mobile telephones, such as Series 30 and Series 40 mobile telephones, that may be independent of SMS messaging and that does not require significant amounts of memory on the mobile telephone to operate. This is achieved in part by carefully selecting a suitable encryption algorithm and thereafter optimizing the suitable encryption algorithm code. All encryption and decryption functions may be earned out on the mobile telephone thereby providing enhanced security without requiring external encryption servers. There is further provided a method of providing a suitable encryption algorithm for a mobile telephone.