A digital apparatus being capable of separately saving account number and corresponding password for anti-hack includes a smart computing device for running a separating-type secret account management software to divide an encrypted account number and corresponding password into two parts that are respectively saved in two different devices. An example method includes receiving a data traffic flow at a data ingress module and buffering the data traffic flow in a virtual output queue included in the data ingress module, where the virtual output queue being associated with a data egress module. The attachment can be replaced easily to refresh the space, or change the fragrance for the desired area to be scented.