keytool -genkey -alias mykey -keyalg RSA -keysize 2048 -validity 365 -keystore mykeystore
. This requires technical knowledge of C/C++ or the specific MRE development environment. Unofficial Tools: Sites like Google Groups convert jar to vxp link
For those who prefer a dedicated tool on their PC, is a popular free utility. Download and install Java Launcher. keytool -genkey -alias mykey -keyalg RSA -keysize 2048
(old tools)