Changes to alter encryption key

The syntax for alter encryption key is:

alter encryption key [database_name.[ owner ] . ] key_name
          { [ as | not default ]
               | [ with passwd 
                    'password' | system_encr_passwd | login_password ]
                    modify encryption 
                    [with passwd
                    'password' | login_passwd |
                    system_encr_passwd ]
                | with passwd 'password'
       add encryption [ with passwd 'password' ] 
                    for user user_name
                    [ for login_association | for recovery ]
                | drop encryption for
                    { user user_name | key recovery } 
                | [ with passwd 'password ']
                    recover encryption with passwd 'password'
                | modify owner user_name
}