Source device, content providing method using the source device, sink device and controlling method of the sink device

A method of transmitting content from an electronic device to a display device, the method comprising:

• identifying a high-bandwidth digital content protection (HDCP) version supported by the display device;
• based on identifying that the HDCP version supported by the display device is not a first HDCP version, downscaling a content;
• encrypting the downscaled content based on a second HDCP version;
• and
• transmitting the encrypted content to the display device.

A system for processing digital content, the system comprising:

• a display device comprising at least one processor configured to:
• receive a content, and
• process and display the content;
• and
• an electronic device comprising at least one processor configured to:
• identify a high-bandwidth digital content protection (HDCP) version supported by the display device,
• based on identifying that the HDCP version supported by the display device is not a first HDCP version, downscale a content,
• encrypt the downscaled content based on a second HDCP version, and
• transmit the encrypted content to the display device.