Abstract: The present application discloses an Internet of Things (IoT) system, comprising a cloud account server, configured to manage user accounts corresponding to the users respectively, wherein the users comprise a first user; a plurality of IoT devices, communicating with the cloud account server respectively, wherein the plurality of IoT devices including a first IoT device corresponding to the first user, and the first IoT device preserves a first authorization list set by the first user; and a plurality of peripheral devices, including a first peripheral device connected to or communicating with the first IoT device. The first IoT device determines whether other users possess a first authority to access the first peripheral device based on the first authorization list.

Abstract: A mail system for transmitting instant message and method of the same is disclosed. The system comprises a mail servo module, a message protocol module, and a message conversion module. When receiving a message from a client unit, the message conversion module converts the message as a message readable for the mail servo module according to the message protocol module, and transfers the converted message to the mail servo module, and the mail servo module replies an interactive operation corresponding to the converted message. When receiving a message from the mail servo module, the message conversion module converts the message as a message readable for the client unit according to the message protocol module, and transfers the converted message to the client unit.

Abstract: A mail receiving/transmitting system and method with document identification function, which is adapted to a network mailing system with a transmitting end and a receiving end, is provided. The mail receiving/transmitting system includes a bit operation unit, a watermark generator, a watermark decoder and a document identification unit. The bit operation unit generates a first padding value according to a specific part of the mail being mailed by the transmitting end using a predetermined bit operation method. The watermark generator converts the first padding value to a watermark, which is added to the mail before the mail is transmitted. The receiving end receives the mail and decodes the watermark on the mail to obtain the first padding value. Moreover, the bit operation unit in the receiving end also generates a second padding value according to the same part of the mail and the bit operation method as generating the first padding value.