Video surveillance systems using out of band key exchange
US-12177293-B2 · Dec 24, 2024 · US
Terminal device, content recording system, title key recording method, and computer program
US9106882B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9106882-B2 |
| Application number | US-201213879909-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 26, 2012 |
| Priority date | May 9, 2011 |
| Publication date | Aug 11, 2015 |
| Grant date | Aug 11, 2015 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A terminal device 500 that is connected to a key distribution device 400 via a network, and in which a recording medium device 600 is mounted, the key distribution device 400 being for distributing a title key necessary for use of content, the recording medium device 600 being for storing therein the content and the title key. The recording medium device 600 and the key distribution device 400 perform mutual authentication and share shared keys that are identical to each other. The terminal device 500 comprises: a reception unit that receives an encrypted title key from the key distribution device 400 , the encrypted title key being the title key encrypted with the shared key of the key distribution device 400 ; and a transfer unit 513 that transmits the encrypted title key to the recording medium device 600 . Upon completion of the mutual authentication between the recording medium device 600 and the key distribution device 400 , the reception unit and the transfer unit 513 refrain from any involvement with communication data except reception and transmission thereof, the communication data being exchanged between the recording medium device 600 and the key distribution device 400 with use of the shared keys.
First claim
Opening claim text (preview).
The invention claimed is: 1. A terminal device that is connected to a key distribution device via a network, and in which a recording medium device is mounted, the key distribution device being for distributing a title key necessary for use of content, the recording medium device storing therein the content and the title key, the terminal device being for transferring the title key from the recording medium device to a different recording medium device, the recording medium device…
Assignees
Inventors
Classifications
- H04L9/0825Primary
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
- H04N9/79Primary
Electricity · mapped topic
Electricity · mapped topic
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Frequently asked questions
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- What does patent US9106882B2 cover?
- A terminal device 500 that is connected to a key distribution device 400 via a network, and in which a recording medium device 600 is mounted, the key distribution device 400 being for distributing a title key necessary for use of content, the recording medium device 600 being for storing therein the content and the title key. The recording medium device 600 and the key distribution…
- Who is the assignee on this patent?
- Yamaguchi Takahiro, Nakano Toshihisa, Ohmori Motoji, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification H04L9/0825. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Aug 11 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).