When creating a repository location, an option is provided at the bottom of 
  the wizard to save the password between sessions. 
 
In previous releases, passwords were automatically saved between sessions whereas now you have full control over this behavior. There is a caveat to this though - the password file Eclipse uses to save the password between sessions is not very secure. It is difficult, but not impossible, for an intruder to read the file and find your passwords.
We recommend that, if you have strict security requirements, you don't save passwords using this mechanism. Instead, use keypair authentication provided by the extssh connection method.
You can manage the list of passwords that have been cached via the
 Team > CVS > Password Management
 preference page. The page displays the currently saved passwords and allows you to delete 
  them.
Team > CVS > Password Management
 preference page. The page displays the currently saved passwords and allows you to delete 
  them.

Creating a CVS repository location
Connecting and configuring CVS with SSH
Team programming with CVS