TRANSMISSION OF DIGITAL CONTENT TO SELECT DEVICES

• US 20140325554A1
• Filed: 04/29/2014
• Published: 10/30/2014
• Est. Priority Date: 04/29/2013
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: PARK, Hyunho, PARK, Sangmi, HONG, Jupyo
• Granted Patent: US 9,794,606 B2
• Time in Patent Office: Days
• US Class Current: 725/31
• CPC Class Codes: G06F 21/10 Protecting distributed programs or content, e.g. vending or licensing of copyrighted material protection in video systems or pay television H04N7/16 ; Digital rights management [DRM]
• CPC Class Codes: H04L 63/061 for key exchange, e.g. in peer-to-peer networks cryptographic mechanisms or cryptographic arrangements for key agreement H04L9/0838
• CPC Class Codes: H04L 63/10 for controlling access to devices or network resources
• CPC Class Codes: H04N 21/25816 involving client authentication restricting access to computer systems by authenticating users using a predetermined code G06F21/33; cryptographic authentication protocols H04L9/32; networks authentication protocols H04L63/08; authentication in wireless network security H04W12/06
• CPC Class Codes: H04N 21/26613 for generating or managing keys in general key distribution for secret or secure communication involving central third party, e.g. key distribution center [KDC] or trusted third party [TTP] H04L9/083; network support of key management H04L63/06; key management for network security in communication control or processing H04W12/04
• CPC Class Codes: H04N 21/4353 involving decryption of additional data arrangements using cryptography for the use of broadcast information or broadcast-related information H04H60/23
• CPC Class Codes: H04N 21/4405 involving video stream decryption
• CPC Class Codes: H04N 21/4408 involving video stream encryption, e.g. re-encrypting a decrypted video stream for redistribution in a home network
• CPC Class Codes: H04N 21/6334 for authorisation, e.g. by transmitting a key wireless communications network key management H04W12/04; wireless communications network access security H04W12/08
• CPC Class Codes: H04N 21/835 Generation of protective data, e.g. certificates protecting software against unauthorised usage in a vending or licensing environment G06F21/10

Abstract

Disclosed herein are a method and device for transmitting digital content. A selection of at least one device authorized to receive digital content is detected. It is identified whether each selected device contains a session key that corresponds to a local session key. Digital content is transmitted to each device whose session key corresponds to the local key. Digital content is prevented from transmission to unselected devices not having a corresponding session key.

Claims

1. A method for transmitting digital content, the method comprising:

displaying a list of devices authorized to receive digital content, the devices being within a predetermined radius of a sender device;

detecting a selection of at least one of the devices authorized to receive digital content;

identifying whether each selected device contains a session key that corresponds to a local session key, in response to the selection;

transmitting digital content to each device whose session key corresponds to the local session key; and

preventing transmission of digital content to each device not containing a corresponding session key.

2. The method of claim 1, further comprising executing security key exchange authentication and Round Trip Time (RTT) signal authentication to identify which devices are authorized to receive digital content.

3. The method of claim 1, further comprising receiving identity information associated with each device authorized to receive digital content, the identity information comprising Extended Display Identification Data (EDID).

4. The method of claim 3, wherein displaying the list of devices further comprises:

displaying the identity information associated with each device; and

displaying a message asking to connect to a device authorized to receive digital content.

5. The method of claim 1, wherein the list of devices comprises a list of information items associated with the devices authorized to receive digital content.

6. The method of claim 1, further comprising identifying which device has a highest priority according to a predetermined rule.

7. The method of claim 1, wherein identifying whether each selected device contains the session key comprises:

generating the local session key based on a public key and a private key;

transmitting the local session key to each selected device;

receiving a response message from each selected device, the response message comprising a received session key; and

establishing a session with a given selected device, when the received session key from the given selected device corresponds to the local session key.

8. The method of claim 1, wherein each device not containing the session key is authorized to receive digital content but is not a selected device.

9. An electronic device comprising:

a communication unit;

a display unit;

a control unit to;

display, on the display unit, a list of devices authorized to receive digital content, the devices being within a predetermined radius of the electronic device;

detect a selection on the display unit of at least one of the devices authorized to receive digital content;

identify whether each selected device contains a session key that corresponds to a local session key, in response to the selection;

transmit, using the communication unit, digital content to each device whose session key corresponds to the local session key; and

prevent transmission of the digital content to each device not containing a corresponding session key.

10. The electronic device of claim 9, wherein the control unit to further:

detect the devices authorized to receive digital content using a security key authentication module, the security key authentication module to execute security key exchange authentication and Round Trip Time (RTT) signal authentication in compliance with High-bandwidth Digital Content Protection (HDCP) protocol;

collect information associated with the devices authorized to receive digital content using a session management module; and

generate the session key using a session key management module.

11. The electronic device of claim 9, wherein the control unit to further detect the devices authorized to receive digital content using security key exchange authentication and Round Trip Time (RTT) signal authentication.

12. The electronic device of claim 9, wherein the control unit to further receive Extended Display Identification Data (EDID) from each device authorized to receive digital content.

13. The electronic device of claim 9, wherein the control unit to further:

display, using the display unit, information items associated with the devices authorized to receive digital content; and

display a message, using the display unit, the message asking to connect to a device authorized to receive digital content.

14. The electronic device of claim 9, wherein the list of devices comprises a list of information items associated with the devices authorized to receive digital content.

15. The electronic device of claim 9, wherein the control unit to further:

identify whether a given device authorized to receive digital content has a highest priority in accordance with a predetermined rule; and

display, using the display unit, information associated with the given device having the highest priority.

16. The electronic device of claim 9, wherein the control unit to further:

generate the local session key based on a public key and a private key;

transmit the local session key to each selected device;

receive a response message from each selected device, the response message comprising a received session key; and

establish a session with a given selected device, when the received session key from the given selected device corresponds to the local session key.

17. The electronic device of claim 9, wherein each device not containing the session key is authorized to receive digital content but is not a selected device.