This read-create string (0-25 characters) holds the password associated with this host entry; reading it always returns a null string to avoid exposing the password, though a null value is rejected when creating or writing the entry. An admin sets this to the password needed to authenticate to the remote host, understanding that it can be written but never read back for security reasons. Setting it to a valid password string is required to successfully create or update this host entry, since an empty password will be rejected.