An electronic device for transmitting content to a display device, the electronic device comprising: an HDMI interface; and a controller configured to: when it is determined that the display device is connected to the electronic device via the HDMI interface, determine a high-bandwidth digital content protection version supported by the display device, process a content based on the identified high-bandwidth digital content protection version supported by the display device, and transmit the processed content to the display device via the HDMI interface, wherein the controller is configured to process the content based on the identified high-bandwidth digital content protection version by: based on the identified content protection version being a first high-bandwidth digital content protection version, encrypting the content based on the first high-bandwidth digital content protection version, and based on the identified high-bandwidth digital content protection version not being the first high-bandwidth digital content protection version, downscaling the content and encrypting the downscaled content based on a second high-bandwidth digital content protection version, wherein the second high-bandwidth digital content protection version is lower than the first high-bandwidth digital content protection version. an HDMI interface; and a controller configured to: when it is determined that the display device is connected to the electronic device via the HDMI interface, determine a high-bandwidth digital content protection version supported by the display device, process a content based on the identified high-bandwidth digital content protection version supported by the display device, and transmit the processed content to the display device via the HDMI interface, when it is determined that the display device is connected to the electronic device via the HDMI interface, determine a high-bandwidth digital content protection version supported by the display device, process a content based on the identified high-bandwidth digital content protection version supported by the display device, and transmit the processed content to the display device via the HDMI interface, wherein the controller is configured to process the content based on the identified high-bandwidth digital content protection version by: based on the identified content protection version being a first high-bandwidth digital content protection version, encrypting the content based on the first high-bandwidth digital content protection version, and based on the identified high-bandwidth digital content protection version not being the first high-bandwidth digital content protection version, downscaling the content and encrypting the downscaled content based on a second high-bandwidth digital content protection version, wherein the second high-bandwidth digital content protection version is lower than the first high-bandwidth digital content protection version. based on the identified content protection version being a first high-bandwidth digital content protection version, encrypting the content based on the first high-bandwidth digital content protection version, and based on the identified high-bandwidth digital content protection version not being the first high-bandwidth digital content protection version, downscaling the content and encrypting the downscaled content based on a second high-bandwidth digital content protection version, wherein the second high-bandwidth digital content protection version is lower than the first high-bandwidth digital content protection version.