Automating file copies

[Duncan Hill]

Greetings,

I'm in a situation where I need to copy files from one host to another
via a cron job.  Automated FTP is out, due to the need for the
communication to be encrypted.  Is it possible to automate scp or sftp
to do this?  The only problem I can see so far is having to spec the
password somehow, and I'd rather not have a password or passphrase
stored in a file..