CN104301334A - Matched checking system and method for high-bandwidth digital content protection technology - Google Patents
Matched checking system and method for high-bandwidth digital content protection technology Download PDFInfo
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- CN104301334A CN104301334A CN201410620571.5A CN201410620571A CN104301334A CN 104301334 A CN104301334 A CN 104301334A CN 201410620571 A CN201410620571 A CN 201410620571A CN 104301334 A CN104301334 A CN 104301334A
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- Prior art keywords
- hdcp
- module
- receiving
- nfc
- sending
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/4367—Establishing a secure communication between the client and a peripheral device or smart card
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
Abstract
The invention discloses a matched checking system and method for a high-bandwidth digital content protection technology. The system comprises a sending end and a receiving end, wherein the sending end is provided with a first NFC (near field communication) sending and receiving module and a first HDCP (high-bandwidth digital-content copy protection) checking module; the first NFC sending and receiving module is connected with the first HDCP checking module; the receiving end is provided with a second NFC sending and receiving module and a second HDCP checking module; the second NFC sending and receiving module is connected with the second HDCP checking module; the first NFC sending and receiving module of the sending end is connected with the second NFC sending and receiving module of the receiving end in an NFC manner.
Description
[technical field]
The present invention relates to a kind of pairing method of calibration, refer to the pairing method of calibration being applied to HDCP technology especially.
[background technology]
WIFI Display (WFD) technology can make mobile phone, mobile PC are connected by wireless with TV or display, and such user just can enjoy high image quality image display effect when not needing use cable to connect.Its principle is the no matter media file the need of copyright control play of mobile phone or mobile PC end, all needs the unencrypted media file being compressed into H.264 form after being decoded to send when sending.But the problems such as copyright management are also following, because the transmission of transmitting terminal and receiving terminal is based on wireless network, is easy to be intercepted copy by people from centre and goes out.If be copied away, Media Provider and service provider will be subject to huge loss.In order to address this problem, Microsoft have developed HDCP (High-bandwidth Digital Content Protection, HDCP) technology for the protection of the fail safe in the transmitting procedure from transmitting terminal to receiving terminal.But the pairing checking procedure of HDCP technology is comparatively complicated, the regular hour is needed to complete the verifying work of transmitting terminal and receiving terminal.
[summary of the invention]
A kind of HDCP technology is the object of the present invention is to provide to match check system and method, in order to solve in HDCP technology the problem of checking procedure complexity, overlong time of matching.
For achieving the above object, implement a kind of HDCP technology pairing check system of the present invention and comprise transmitting terminal and receiving terminal, wherein transmitting terminal is provided with a NFC sending/receiving module and a HDCP correction verification module, wherein a NFC sending/receiving module is connected with a HDCP correction verification module, receiving terminal has the 2nd NFC sending/receiving module and the 2nd HDCP correction verification module, wherein the 2nd NFC sending/receiving module is connected with the 2nd HDCP correction verification module, one NFC sending/receiving module of transmitting terminal is connected in the mode of NFC with the 2nd NFC sending/receiving module of receiving terminal.
According to above-mentioned principal character, a NFC sending/receiving module of transmitting terminal and the 2nd NFC sending/receiving module of receiving terminal adopt ad hoc mode to carry out communication and complete and match school and examine.
According to above-mentioned principal character, transmitting terminal and receiving terminal are also respectively equipped with the first information and calculate memory module and the second information calculates memory module, be connected with the 2nd HDCP correction verification module with a HDCP correction verification module respectively, the first information calculates memory module and the second information calculates memory module in order to store the check information of the equipment having completed verification.
For achieving the above object, the invention provides a kind of above-mentioned HDCP technology pairing check system and carry out matching the method verified, it is characterized in that the method comprises the steps:
Transmitting terminal completes WFD with receiving terminal by first and second NFC sending/receiving module and is connected;
Transmitting terminal initiates HDCP check request by a NFC sending/receiving module to receiving terminal;
2nd NFC sending/receiving module receives HDCP check request and sends the 2nd HDCP correction verification module to;
Receiving terminal relevant information is fed back to a NFC sending/receiving module by the 2nd NFC sending/receiving module by the 2nd HDCP correction verification module;
The information received sends to a HDCP correction verification module to test certification by the one NFC sending/receiving module.
According to above-mentioned principal character, if verification is passed through, the facility information of the other side and check information are then stored into this locality by transmitting terminal and receiving terminal.
Compared with prior art, the present invention is based on the carrying out contact verification of NFC, both can ensure the fail safe verified, the speed verified can be accelerated again, and solve in existing HDCP technology the problem of checking procedure complexity, overlong time of matching.
[accompanying drawing explanation]
Fig. 1 is for executing the composition frame diagram of HDCP technology of the present invention pairing check system.
Fig. 2 is the schematic flow sheet implementing HDCP technology of the present invention pairing method of calibration.
[embodiment]
For matching the problem of checking procedure complexity, overlong time in existing HDCP technology, the present invention proposes a kind of method of the contact of the carrying out based on NFC verification newly, both can ensure the fail safe verified, and can accelerate again the speed verified.
NFC is a kind of towards the in-plant means of communication, is applicable to the significant datas such as the personal information of exchange financial information or sensitivity.Radio wave is made up of quadrature field, and at the operating frequencies around antenna in about 10 wave-length coverages, electromagnetic wave is separate, and this magnetic field can be used for short distance communication.As the wireless technology of any advanced person, NFC faces safety problem equally.But NFC device is very little because of communication context, therefore hacker can be foreclosed completely, communication can be carried out overall safety.
NFC has three kinds of application models usually, specific as follows.
(1) analog card tablet mode
In such a mode, traditional contactless smart card that the mobile phone with NFC function is read by outside card reader the spitting image of.Data are read by outside card reader, and concurrent carry information is to operate further.This basis making not change existing utility just can use NFC mobile phone to carry out non-contacting payment and ticketing service business.
(2) ad hoc mode
The equipment of two band NFC functions can be exchanging data with one another in such a mode, and two equipment all participate in communication.
(3) read/write mode
Under this pattern, NFC device (as mobile phone) can read and write NFC label, and equipment can information in reading tag, to operate further.
Because equipment data interaction function each other will be realized in the present invention, be suitable for and adopt ad hoc mode.
In the present invention, NFC is as a kind of mode of closely fast transport information.In use, radio frequency (RF) the sinusoidal wave transferring energy that the reader (as mobile phone) with NFC function produces, to label, then reads data from label.After the NFC function on of reader, the centre frequency continuing the sine wave signal produced is 13.56MHz.If there is label within the scope of the disturbance of magnetic field that sine wave produces, then label obtains energy by disturbance of magnetic field, produces and primary sinusoid inverse frequency or the electromagnetic wave changing frequency attribute.Reader detects electromagnetic this change, has label near just knowing.RFID is commonly called nearly pair system in very near distance communication.The coverage of nearly pair system normally 0 to 1 centimetre, this means that label needs near reader or pastes on the reader.In-plant advantage like this is that the electromagnetic field of label can send very large energy, is enough to support communication, and does not need built-in power, and above-mentioned nearly matching method is also beneficial to highly confidential occasion.
Refer to shown in Fig. 1; for implementing the composition frame diagram of HDCP technology of the present invention pairing check system; this HDCP technology pairing check system comprises transmitting terminal and receiving terminal; wherein transmitting terminal is provided with a NFC sending/receiving module and a HDCP correction verification module, and wherein a NFC sending/receiving module is connected with a HDCP correction verification module.Receiving terminal has the 2nd NFC sending/receiving module and the 2nd HDCP correction verification module, and wherein the 2nd NFC sending/receiving module is connected with the 2nd HDCP correction verification module.One NFC sending/receiving module of transmitting terminal is connected in the mode of NFC with the 2nd NFC sending/receiving module of receiving terminal, adopts ad hoc mode to carry out communication and completes the inspection of pairing school.
In addition, transmitting terminal and receiving terminal are also respectively equipped with the first information and calculate memory module and the second information calculates memory module, be connected with the 2nd HDCP correction verification module with a HDCP correction verification module respectively, the first information calculate memory module and the second information calculate memory module primary responsibility when two equipment had completed verify after, the other side's check information is stored into this locality, namely add white list to, when verifying next time, wherein numerous and diverse flow process can be saved.The equipment such as having stored a Device ID=A when this locality once successfully matched and used.When then carrying out NFC pairing next time again, be put into white list when reading the other side Device ID, whether user can connect fast from main separation, if so, extracts the traffic encryption key stored directly encrypt from this locality.Same, certain equipment also can be drawn in blacklist by user at any time, after finding this equipment next time, directly refuses request.
Invention introduces NFC closely interconnection technique match, thus can complete instantaneously pairing verification.
Refer to shown in Fig. 2, for implementing the schematic flow sheet of HDCP technology of the present invention pairing method of calibration, the method comprises the steps:
Transmitting terminal completes WFD with receiving terminal by first and second NFC sending/receiving module and is connected;
Transmitting terminal initiates HDCP check request by a NFC sending/receiving module to receiving terminal;
2nd NFC sending/receiving module receives HDCP check request and sends the 2nd HDCP correction verification module to;
Receiving terminal relevant information is fed back to a NFC sending/receiving module by the 2nd NFC sending/receiving module by the 2nd HDCP correction verification module;
The information received sends to a HDCP correction verification module to test certification by the one NFC sending/receiving module.
In the specific implementation, first the message event in HDCP is added to respectively in the NFC analytical function of a NFC sending/receiving module of transmitting terminal and the 2nd NFC sending/receiving module of receiving terminal, complete WFD by NFC and connect, transmitting terminal initiates HDCP check request afterwards, first transmitting terminal sends authenticate key exchange message AKE_Init (AKE (Authenticated Key Exchange), authenticate key exchanges, authenticate key exchange message AKE_Init is the first step of HDCP verification, specify in the RFC4186 required in HDCP verification), this authenticate key exchange message AKE_Init comprises a random number R tx and authenticate key exchange message sends message (AKE_Transmitter_Info), above-mentioned data encapsulate by the one NFC sending/receiving module, send to receiving terminal.Afterwards, the 2nd NFC sending/receiving module is decoded after receiving the data of transmitting terminal transmission, if find message event authenticate key exchange message AKE_Init, this event is sent to the 2nd HDCP correction verification module process.2nd HDCP correction verification module is after the authenticate key exchange message AKE_Init receiving the 2nd NFC sending/receiving module forwarding, feed back to the 2nd NFC sending/receiving module authenticate key exchange message receipt message AKE_Receiver_Info, this authenticate key exchange message receipt message AKE_Receiver_Info encapsulates by the 2nd NFC sending/receiving module, sends to a NFC sending/receiving module.After transmitting terminal resolves the message of receiving terminal return, judge that whether the authenticate key exchange message receipt message AKE_Receiver_Info that the 2nd NFC sending/receiving module sends is registered in first information computing module.Authenticate key exchange message receipt message AKE_Receiver_Info in this way, just sends to a HDCP correction verification module process of transmitting terminal.One HDCP correction verification module judges whether transmitting terminal is stored in Km, if Sender side Storage crosses Km, be the facility information in white list and information matches as determined through comparison, then directly connect, as no, then transmitting terminal sends authenticate key exchange message and does not store the message AKE_No_Store_Km of KM to receiving terminal, and incidentally adds overstocked Km '; The Rrx (numerical value claimed in HDCP checking procedure) produced is packaged into NFC message and sends to transmitting terminal by receiving terminal, then the more packaged H ' (whether successfully HDCP verification is used for verification check value) calculated is sent to transmitting terminal; The HDCP correction verification module of transmitting terminal calculates check results H; And the H ' comparison sent with receiving terminal, if identical, then verification is passed through, and this facility information then joins in white list by transmitting terminal and receiving terminal, and the other side's check information is stored into this locality.
In above-mentioned step, transmitting terminal all can preserve a value Km, if never connected to the terminal once connected in the past, then there is no corresponding Km, then send AKE_No_Store_Km message to receiving terminal, and incidentally add overstocked Km ', this is an interim numerical value.
The process of foregoing description is complete HDCP verification process, from the past transmit different based on WIFI, set up HDCP connect before be the checking procedure be transmitted by NFC, the framework of HDCP certification specifies in RFC4186, no longer describes in detail herein.The present invention, by original certification based on WIFI, becomes the process that the HDCP certification based on NFC is set up, thus makes fail safe obtain great raising.
If transmitting terminal and receiving terminal user determine this equipment to add in local white list, then mean, during verification next time, first want the facility information in comparison white list, if coupling, then directly connect.
In order to avoid potential safety hazard, after first time successfully connects, transmission and receiving terminal will record two ends hash algorithm separately respectively.Certainly also have other algorithms in the specific implementation, only illustrate herein.
Such as transmitting terminal Device ID=a, receiving terminal Device ID=b
And transmitting terminal Hash b=1, and receiving terminal Hash a=2.
And result of calculation is kept on opposite equip., as at receiving terminal record a and 1, and at transmitting terminal record b and 2
Such next time, at transmitting terminal, if finding is receiving terminal b, the result that the Hash simultaneously receiving the other end calculates was 1, and the result that the Hash b of receiving terminal calculates also is 1 when using rapid verification method.Then prove that the result that receiving terminal provides is correct.
Simultaneously at receiving terminal, discovery is transmitting terminal a, and receive result that transmitting terminal Hash calculates is 2. in this locality simultaneously, and the result that receiving terminal Hash calculates also equals 2, then prove that transmitting terminal is also the equipment added to last time in white list really.
Be understandable that, for those of ordinary skills, can be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, and all these change or replace the protection range that all should belong to the claim appended by the present invention.
Claims (5)
1. a HDCP technology pairing check system; comprise transmitting terminal and receiving terminal; wherein transmitting terminal is provided with a NFC sending/receiving module and a HDCP correction verification module; wherein a NFC sending/receiving module is connected with a HDCP correction verification module; receiving terminal has the 2nd NFC sending/receiving module and the 2nd HDCP correction verification module; wherein the 2nd NFC sending/receiving module is connected with the 2nd HDCP correction verification module, and a NFC sending/receiving module of transmitting terminal is connected in the mode of NFC with the 2nd NFC sending/receiving module of receiving terminal.
2. HDCP technology pairing check system as claimed in claim 1, is characterized in that: a NFC sending/receiving module of transmitting terminal and the 2nd NFC sending/receiving module of receiving terminal adopt ad hoc mode to carry out communication and complete and match school and examine.
3. HDCP technology pairing check system as claimed in claim 1; it is characterized in that: transmitting terminal and receiving terminal are also respectively equipped with the first information and calculate memory module and the second information calculates memory module; be connected with the 2nd HDCP correction verification module with a HDCP correction verification module respectively, the first information calculates memory module and the second information calculates memory module in order to store the check information of the equipment having completed verification.
4. utilize the pairing of the HDCP technology described in claim 1 check system to carry out matching the method verified, it is characterized in that the method comprises the steps:
Transmitting terminal completes WFD with receiving terminal by first and second NFC sending/receiving module and is connected;
Transmitting terminal initiates HDCP check request by a NFC sending/receiving module to receiving terminal;
2nd NFC sending/receiving module receives HDCP check request and sends the 2nd HDCP correction verification module to;
Receiving terminal relevant information is fed back to a NFC sending/receiving module by the 2nd NFC sending/receiving module by the 2nd HDCP correction verification module;
The information received sends to a HDCP correction verification module to test certification by the one NFC sending/receiving module.
5. the method for pairing verification as claimed in claim 4, is characterized in that: if verification is passed through, the facility information of the other side and check information are then stored into this locality by transmitting terminal and receiving terminal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410620571.5A CN104301334A (en) | 2014-11-06 | 2014-11-06 | Matched checking system and method for high-bandwidth digital content protection technology |
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| CN201410620571.5A CN104301334A (en) | 2014-11-06 | 2014-11-06 | Matched checking system and method for high-bandwidth digital content protection technology |
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| CN103457724A (en) * | 2012-06-05 | 2013-12-18 | 中兴通讯股份有限公司 | Method and system for point-to-point data safe transmission |
| CN103533542A (en) * | 2012-07-04 | 2014-01-22 | 中兴通讯股份有限公司 | Method and apparatus for establishing wireless connection between electronic devices |
| US20140096165A1 (en) * | 2012-09-28 | 2014-04-03 | Marvell World Trade Ltd. | Enhanced user experience for miracast devices |
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Application publication date: 20150121 |