SCP put files

[Prog]

How can I use SCP to put files on a remote server? I can't figure out any way to pass a password using SCP and it would also seem like a security risk to include my password in a script. Any ideas?

[Wanch]

I've read that you can use an SSH key to authenticate. Basically, make the key have no passphrase and when you connect via SSH it will login.

[Hektor]

What command are you issuing to SCP put files?