Reception device, reception method, and transmission method

1. A reception device, comprising:

a central processing unit (CPU) configured to:

for one of a plurality of channels,

determine whether an electronic certificate corresponding to the one of the plurality of channels is stored in the reception device; and

receive a broadcast signal on the one of the plurality of channels and acquire, when the electronic certificate is determined to not be stored in the reception device, the electronic certificate from the broadcast signal received on the one of the plurality of channels;

receive an audio-video (AV) content on the one of the plurality of channels transmitted via the broadcast signal;

acquire at least a first application attached with information and a second application not attached with the information;

list the first application and the second application for a user to select; and

execute the first application when selected by the user and output the AV content concurrently based on a verification of the information, wherein

the CPU verifies the information based on the electronic certificate corresponding to the one of the plurality of channels on which the AV content is received.

2. The reception device according to claim 1 , wherein

the information corresponds to an electronic signature.

3. The reception device according to claim 2 , wherein

the CPU is further configured to launch and execute the first application based on a determination that the first application is trustworthy, and

the CPU determines whether the first application is trustworthy based on whether the information is verified by the CPU.

4. The reception device according to claim 1 , wherein each channel of the plurality of channels is associated with a different certificate.

5. The reception device according to claim 1 , wherein an electronic program guide transmitted via the broadcast signal includes an identifier of the electronic certificate for the one of the plurality of channels.

6. The reception device according to claim 1 , wherein the CPU is further configured to share the electronic certificate with an electronic device connected to the reception device via a network.

7. The reception device according to claim 1 , wherein the CPU is further configured to acquire the first application from a server via a network.

8. A reception method, comprising:

for one of a plurality of channels,

determining, by a central processing unit (CPU) of a reception device, whether an electronic certificate corresponding to the one of the plurality of channels is stored in the reception device;

receiving a broadcast signal on the one of the plurality of channels and acquiring, when the electronic certificate is determined to not be stored in the reception device, the electronic certificate from the broadcast signal received on the one of the plurality of channels;

receiving audio-video (AV) content on the one of the plurality of channels transmitted via the broadcast signal;

acquiring at least a first application attached with information and a second application not attached with the information;

listing the first application and the second application for a user to select; and

executing, by the CPU, the first application when selected by the user and outputting the AV content concurrently based on a verification of the information, wherein

the CPU verifies the information based on the electronic certificate corresponding to the one of the plurality of channels on which the AV content is received.

9. A transmission method, comprising:

acquiring, by a transmission device, an electronic certificate for one of a plurality of channels, the electronic certificate being used by a reception device to verify an electronic signature attached to a first application executed by the reception device concurrently with an output of an audio-video (AV) content;

transmitting the electronic certificate on a broadcast signal of the one of the plurality of channels;

transmitting the AV content on the one of the plurality of channels via the broadcast signal;

acquiring the first application with the electronic signature attached and a second application without the electronic signature attached; and

transmitting the first application and the second application, wherein

the reception device determines, for the one of the plurality of channels, whether the electronic certificate corresponding to the one of the plurality of channels is stored in the reception device, and

the reception device receives the broadcast signal on the one of the plurality of channels, acquires, when the electronic certificate is not stored in the reception device, the electronic certificate from the broadcast signal received on the one of the plurality of channels transmitted by the transmission device, lists the first application and the second application for a user to select, executes the first application when selected by the user, and outputs the AV content concurrently based on a verification of the electronic signature.

10. The transmission method according to claim 9 , wherein the first application is transmitted via a network based on a request received from a receiver.

11. The reception device according to claim 1 , wherein

the electronic certificate includes a first identifier,

the information corresponds to an electronic signature attached to the first application, and

the electronic signature comprises a second identifier of a second electronic certificate.

12. The reception device according to claim 11 , wherein the CPU is further configured to:

acquire the first identifier from the electronic certificate;

acquire the second identifier of the second electronic certificate included in the electronic signature;

compare the first identifier and the second identifier; and

verify the electronic signature attached with the first application based on the comparison.

13. The reception method of claim 8 , wherein the information corresponds to an electronic signature.

14. The reception method of claim 13 , wherein executing the first application comprises launching and executing the first application based on a determination that the first application is trustworthy, wherein the CPU determines whether the first application is trustworthy based on whether the information is verified by the CPU.

15. The reception method of claim 8 , further comprising:

transmitting an electronic program guide via the broadcast signal, the electronic program guide including an identifier of the electronic certificate for the one of the plurality of channels.

16. The reception method of claim 8 , further comprising:

sharing the electronic certificate with an electronic device connected to the reception device via a network.

17. The reception method of claim 8 , further comprising:

acquiring the first application from a server via a network.

18. The reception method of claim 8 , further comprising:

associating each channel of the plurality of channels with a different certificate.