secure way of rsyncing ?

hello, i have to keep three servers uptodate and i would like to do this using rsync. as far as i know there are several security concerns about rsync, so is there another tool available that can do this for me ? btw ... i am using sftp to encrypt my ftp-session ? maybe there's a similiar tool for rsync available, too ? regards, jens --------------------------------------------------------------------------- instant networks - netzwerkmanagment & internetfullservices