Worth reading: Security on BlackBerry devices
Security firm SMobile has investigated the effectiveness of the trojan protection on BlackBerry devices. The BlackBerry platform offers various built-in security features to prevent malware from infecting and compromising devices. For instance, the operating system asks users for their approval before giving unsigned applications access to certain resources. However, Mayank Aggarwal and Troy Vennon have found that many of the relevant messages can easily be misconstrued.
To test this in practice, the authors developed several proof-of-concept trojans that, for instance, secretly try to discover a user's data. They have compiled their precise approach as well as their conclusions in a richly illustrated document entitled "Study of BlackBerry Proof-of-Concept Malicious Applications".
Study of BlackBerry Proof-of-Concept Malicious Applications, an SMobile paper by Mayank Aggarwal & Troy Vennon.