Before you configure Subversion or Dreamweaver for SVN+SSH, create an RSA key pair and configure the public key on the server. This public/private key pair is used to authenticate with the server, instead of storing and passing your password in plain text. (It is possible to configure SSH without using key pairs; however, Adobe doesn't recommend doing so because of the lack of security.)
To configure the RSA keys, create the private/public RSA key pair on the client computer. Put the public key on the server, and then authorize the key on the server. Adobe also recommends testing the SSH connection afterward to verify that it is configured correctly.
Note: Access to the client computer (that is, the one from which you connect) is required to complete these steps. These steps also require access to the server (for example, directly or via SSH/FTP). On Windows, you need access to an SSH client (for example, TortoiseSVN) and an RSA key generator application (for example PuTTYgen). Mac OS comes with an SSH client and a key generator.