Net.rim.crypto not found

I've been trying to use cryptography in my BlackBer开发者_Go百科ry application (using net.rim.crypto library) but when I try to run it on a 5.0 BlackBerry device, the app doesn't open and I get the message "net.rim.crypto not found".

What I need to do to use RSA encryption (of text) in my app running on a 5.0 device?

The net.rim.crypto package does not exist in the BlackBerry OS, at least as far as I am aware. If you want to do encryption/cryptography on BlackBerries, you should use the net.rim.device.api.crypto package instead.