Abstract: A wearable device includes a user information obtainer configured to obtain user information, a controller configured to selectively generate, in response to a user being authenticated based on the user information, an encryption key for encryption of content of an external device; and a communicator configured to transmit the encryption key to the external device.

Abstract: An example electronic apparatus includes an information generator configured to generate information used to one function of a user terminal, a communicator configured to communicate with the user terminal, the server and a plurality of external apparatuses having a plurality of operation modes, and a controller configured to control the communicator: to attempt an access to the server at a first operation mode; in response to determining that the server is in a normal communication state based on the access attempt, to provide information generated by the information generator to the user terminal via the server; and in response to determining that the server is in a communication pending state based on the access attempt, to transmit a first mode changing signal for operating in a second operation mode, which restricts the access to the server, to at least one of the plurality of external apparatuses.

Abstract: A method of transmitting data via a data transmitting device in a wireless network environment is provided. The method includes determining whether traffic is saturated or not based on an access category (AC) into which the data is classified according to a type of application that transmits the data, a queue size, and a predetermined threshold value and determining a transmission scheme according to a determination result of whether traffic is saturated or not and the AC of the data.

Abstract: An electronic apparatus having a plurality of operation modes with respect to an access to a server is provided. The electronic apparatus includes an information generator configured to generate information used to one function of a user terminal, a communicator configured to communicate with the user terminal, the server and a plurality of external apparatuses having the plurality of operation modes, and a controller configured to control the communicator: to attempt an access to the server at a first operation mode; in response to determining that the server is in a normal communication state based on the access attempt, to provide information generated by the information generator to the user terminal via the server; and in response to determining that the server is in a communication pending state based on the access attempt, to transmit a first mode changing signal for operating in a second operation mode, which restricts the access to the server, to at least one of the plurality of external apparatuses.

Abstract: A wearable device includes a user information obtainer configured to obtain user information, a controller configured to selectively generate, in response to a user being authenticated based on the user information, an encryption key for encryption of content of an external device; and a communicator configured to transmit the encryption key to the external device.

Abstract: A wearable device includes a user information obtainer configured to obtain user information, a controller configured to selectively generate, in response to a user being authenticated based on the user information, an encryption key for encryption of content of an external device; and a communicator configured to transmit the encryption key to the external device.

Abstract: A wearable device includes a user information obtainer configured to obtain user information, a controller configured to selectively generate, in response to a user being authenticated based on the user information, an encryption key for encryption of content of an external device; and a communicator configured to transmit the encryption key to the external device.

Abstract: A method of transmitting data via a data transmitting device in a wireless network environment is provided. The method includes determining whether traffic is saturated or not based on an access category (AC) into which the data is classified according to a type of application that transmits the data, a queue size, and a predetermined threshold value and determining a transmission scheme according to a determination result of whether traffic is saturated or not and the AC of the data.