CONTENT VIEWING METHOD AND MOBILE INFORMATION TERMINAL USED FOR SAME

• US 20200137439A1
• Filed: 06/08/2017
• Published: 04/30/2020
• Est. Priority Date: 06/08/2017
• Status: Active Grant

• Current Assignee: Maxell, Ltd.
• Original Assignee: Maxell, Ltd.
• Inventors: YOSHIZAWA, Kazuhiko, HASHIMOTO, Yasunobu, SHIMIZU, Hiroshi, OKADA, Yoshinori
• Granted Patent: US 11,223,865 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 13/00 Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units interface circuits for specific input/output devices G06F3/00 ; multiprogram control therefor G06F9/46; multiprocessor systems G06F15/16
• 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 2209/80 Wireless
• CPC Class Codes: H04L 9/0819 Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s) network architectures or network communication protocols for key distribution in a packet data network H04L63/062
• CPC Class Codes: H04L 9/0894 Escrow, recovery or storing of secret information, e.g. secret key escrow or cryptographic key storage
• CPC Class Codes: H04L 9/3226 using a predetermined code, e.g. password, passphrase or PIN network architectures or network communication protocols for supporting authentication of entities using passwords in a packet data network H04L63/083
• CPC Class Codes: H04N 21/2347 involving video stream encryption
• CPC Class Codes: H04N 21/2541 Rights Management protecting software against unauthorised usage in a vending or licensing environment G06F21/10; security in data switching network management H04L41/28; security management or policies for network security H04L63/20; access security in wireless networks H04W12/08
• 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 21/4122 additional display device, e.g. video projector digital output for controlling a plurality of local displays G06F3/1423
• CPC Class Codes: H04N 21/4126 The peripheral being portable, e.g. PDAs or mobile phones
• CPC Class Codes: H04N 21/43615 Interfacing a Home Network, e.g. for connecting the client to a plurality of peripherals home Audio Video Interoperability [HAVI] data switching networks H04L12/2805
• CPC Class Codes: H04N 21/43853 involving multiplex stream decryption arrangements using cryptography for the use of broadcast information or broadcast-related information H04H60/23
• CPC Class Codes: H04N 21/44227 Monitoring of local network, e.g. connection or bandwidth variations; Detecting new devices in the local network configuring of peripheral devices in general G06F9/4411; monitoring connectivity in data switched networks H04L43/0811
• CPC Class Codes: H04N 21/4753 for user identification, e.g. by entering a PIN or password cryptographic authentication protocols H04L9/32; networks authentication protocols H04L63/08
• CPC Class Codes: H04N 21/63345 by transmitting keys key distribution for secret or secure communication H04L9/08; network support of key management H04L63/06

Abstract

A content viewing method uses a viewing system including a content distribution server distributing contents, a mobile information terminal, and a viewing device reproducing a content. The mobile information terminal transmits user identification information and a user password to the content distribution server. The content distribution server authenticates the mobile information terminal based on the user identification information and the user password. The mobile information terminal transmits an account issue request requesting an account for reproducing a desired content to the content distribution server. The content distribution server issues the account based on the account issue request and transmits the account to the mobile information terminal. The mobile information terminal stores the account. The mobile information terminal transmits the account by short-range wireless communication. The viewing device stores the account received by short-range wireless communication. The viewing device reproduces the desired content using the stored account.

Claims

1. A content viewing method using a viewing system including a content distribution server that distributes contents, a mobile information terminal, and a viewing device that reproduces a content, comprising:

a first step in which the mobile information terminal transmits user identification information and a user password to the content distribution server;

a second step in which the content distribution server authenticates the mobile information terminal on the basis of the received user identification information and the received user password;

a third step in which the mobile information terminal transmits an account issue request for requesting an account for reproducing a desired content to the content distribution server;

a fourth step in which the content distribution server issues the account on the basis of the received account issue request and transmits the issued account to the mobile information terminal;

a fifth step in which the mobile information terminal stores the received account;

a sixth step in which the mobile information terminal transmits the stored account by short-range wireless communication;

a seventh step in which the viewing device stores the account received by the short-range wireless communication; and

an eighth step in which the viewing device reproduces the desired content using the stored account.

2. The content viewing method according to claim 1,

wherein the content distribution server, the mobile information terminal, and the viewing device are connected via a network;

and

in the eighth step, the viewing device transmits the account to the content distribution server via the network so as to request viewing, receives the desired content transmitted by the content distribution server according to the viewing request, and reproduces the desired content.

3. The content viewing method according to claim 2,

wherein in the sixth step, the mobile information terminal continuously transmits the stored account by short-range wireless communication;

and

the viewing device executes a ninth step in which the viewing device transmits a viewing halt request to the content distribution server via the network when the reception of the account continuously transmitted is interrupted during execution of the eighth step and the viewing device interrupts reproduction of the desired content when the content distribution server halts transmission of the desired content according to the viewing halt request.

4. The content viewing method according to claim 3,

wherein the viewing device executes a tenth step in which the viewing device transmits the account to the content distribution server via the network so as to request viewing when reception of the account is resumed after the reception of the continuously transmitted account is interrupted and the ninth step is executed, receives the desired content transmitted by the content distribution server according to the viewing request, and resumes the interrupted reproduction of the desired content.

5. The content viewing method according to claim 3, further comprising, after the viewing device executes the ninth step using a second viewing device apart from the viewing device:

an eleventh step in which the mobile information terminal transmits the stored account by short-range wireless communication;

a twelfth step in which the second viewing device stores the account received by short-range wireless communication; and

a thirteenth step in which the second viewing device transmits the account to the content distribution server via the network so as to request viewing, receives the desired content transmitted by the content distribution server according to the viewing request, and resumes interrupted reproduction of the desired content.

6. The content viewing method according to claim 5,

wherein in the ninth step, further, the viewing device transmits viewing interruption information showing a viewing interrupted position or viewing interrupted time of the desired content to the mobile information terminal when reception of the continuously transmitted account is interrupted and the mobile information terminal stores the viewing interruption information;

in the eleventh step, further, the mobile information terminal transmits the stored viewing interruption information to the second viewing device by the short-range wireless communication; and

in the thirteenth step, further, the second viewing device resumes the interrupted reproduction of the desired content from the viewing interrupted position or the viewing interrupted time on the basis of the received viewing interruption information.

7. The content viewing method according to claim 3,

wherein the mobile information terminal starts or halts transmitting the stored account by the short-range wireless communication according to operation of a user.

8. The content viewing method according to claim 1,

wherein the content distribution server and the mobile information terminal are connected via a network;

the content is encrypted and is wirelessly broadcast from the content distribution server to the viewing device;

the account includes key information for decrypting the wirelessly broadcast content; and

in the eighth step, the viewing device receives the desired content wirelessly broadcast from the content distribution server, decrypts the desired content using the key information, and reproduces the desired content.

9. The content viewing method according to claim 8,

wherein in the eighth step, the viewing device receives encrypted related information including a scrambling key for decrypting the desired content from the content distribution server, decrypts the related information by the key information, decrypts the desired content using the scrambling key extracted by decrypting the related information, and reproduces the desired content.

10. The content viewing method according to claim 9,

wherein the related information is configured by encrypted first and second related information respectively including first and second keys respectively required for decrypting the desired content;

and

the viewing device decrypts the first related information by the key information, decrypts the second related information using the first key extracted by decrypting the first related information, decrypts the desired content using the second key extracted by decrypting the second related information, and reproduces the desired content.

11. The content viewing method according to claim 1,

wherein the content distribution server and the mobile information terminal are connected via a network;

the content is encrypted and is wirelessly broadcast from the content distribution server to the viewing device used for a second viewing device and a first viewing device different from the viewing device;

a wireless broadcast transmits encrypted first related information including a first key required for decrypting the content and encrypted second related information including a second key together with the content;

the first viewing device and the second viewing device can utilize a first device and a second device installed in each viewing device;

the first device stores first ID linked with the user identification information and a first master key unique to the first device;

the content distribution server stores the first ID and the first master key beforehand;

in the fourth step, the content distribution server issues the first ID and the first master key on the basis of the received account issue request as an account and transmits the issued account to the mobile information terminal;

in the fifth step, the mobile information terminal stores the first ID and the first master key as the account;

in the sixth step, the mobile information terminal transmits the first ID and the first master key by short-range wireless communication as the account;

in the seventh step, the second viewing device stores the first ID and the first master key as the account; and

in the eighth step, the second viewing device decrypts the first related information by the first master key included in the account, decrypts the second related information using the first key extracted by decrypting the first related information, decrypts the content using the second key extracted by decrypting the second related information, and enables reproduction of the content.

12. A mobile information terminal used for a content viewing method using a viewing system including a content distribution server that distributes contents, the mobile information terminal, and a viewing device that reproduces a content, comprising:

a control unit;

a memory unit;

a first communication unit for communicating with the content distribution server;

a second communication unit having shorter communication distance than the first communication unit for communicating with the viewing device; and

an input unit,

wherein the memory unit stores user identification information and a user password;

the control unit instructs the first communication unit to transmit the user identification information and the user password to the content distribution server;

the control unit instructs the first communication unit to transmit an account issue request for requesting an account for reproducing a desired content to the content distribution server;

the control unit instructs the first communication unit to store the account received from the content distribution server in the memory unit; and

the control unit instructs the second communication unit to continuously or periodically transmit the account.

13. The mobile information terminal according to claim 12,

wherein at least one of start, continuation, interruption and resumption of continuous or periodic transmission of the account by the second communication unit is enabled by operation of a user via the input unit.

14. The mobile information terminal according to claim 12,

wherein the control unit instructs the second communication unit to store viewing interruption information showing a viewing interrupted position or viewing interrupted time of the desired content in the memory unit when the second communication unit receives the viewing interruption information from the viewing device.

15. The mobile information terminal according to claim 12,

wherein a content distributed from the content distribution server is broadcast on a first viewing device and a second viewing device via broadcast-side equipment after the content is encrypted, and the first viewing device and the second viewing device decode the content using first key information and second key information respectively stored;

the control unit instructs the first communication unit to receive the same information as the first key information stored in the first viewing device from the content distribution server via the first control unit and to store the information in the memory unit as an account; and

the control unit instructs the second communication unit to transmit the first key information to the second viewing device by continuously or periodically transmitting the account.