need help with key generation

[Pollywog]

I installed OpenZaurus on my Zaurus SL-5500 (the GPE version) and instead of 
OpenSSH, it has Dropbear.  I am able to ssh to the Zaurus from my desktop 
machine, but I am unable to figure out how to generate user keys (I was able 
to generate only the secret key id_rsa but not a public key to go in my home 
directory and to be added to the keys on the desktop machine in ~/.ssh/
authorized_keys

My disktop machine uses OpenSSH protocol 2 and it is configured not to accept 
password logins, it only accepts passphrases, either with dsa or rsa type 
keys.

Is there a HowTo or a place where I can find this info or is it best for me to 
use OpenSSH if I want to connect to my desktop machine running sshd as 
described?


thanks