How do I access a login through ssh when there is no password set?

How do I access a login through ssh when there is no password set?

I would like to be able to access my home machine's account over ssh from
a remote desktop. It allows me to connect when I say ssh uname@ip_addr,
but it then prompts for a password. This account has no password set up.
Is there some way to simply connect with no password? (Usually when the
need arises to do this I'm on Mac OSX or FreeBSD, occasionally Fedora.)
Any help would be appreciated. (A reference to a line on a man page or
equiv. would be an acceptable answer.)
Thanks.