WO2018001193A1 - Procédé, dispositif, et système de lecture sécurisée sur un canal de télévision à protocole internet - Google Patents

Procédé, dispositif, et système de lecture sécurisée sur un canal de télévision à protocole internet Download PDF

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Publication number
WO2018001193A1
WO2018001193A1 PCT/CN2017/089940 CN2017089940W WO2018001193A1 WO 2018001193 A1 WO2018001193 A1 WO 2018001193A1 CN 2017089940 W CN2017089940 W CN 2017089940W WO 2018001193 A1 WO2018001193 A1 WO 2018001193A1
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Prior art keywords
signature
public key
transmission
code stream
verification
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PCT/CN2017/089940
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English (en)
Chinese (zh)
Inventor
刘小斌
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中兴通讯股份有限公司
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Publication of WO2018001193A1 publication Critical patent/WO2018001193A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols

Definitions

  • the present invention relates to the field of information security technologies, and in particular, to a method, device and system for securely playing an interactive network television channel.
  • IPTV Internet Protocol Television
  • IPTV Internet Protocol Television
  • IPTV has made new progress in integrating broadcast control platform, technical standards and operation mode construction, and user and market expansion.
  • the industry has gradually entered a new stage of orderly and steady development.
  • the IPTV integrated broadcast control platform system is increasingly perfect, the technology is continuously improved, the business content is more abundant, and the users have reached a considerable scale. Therefore, the security problem of IPTV has become an urgent problem to be solved.
  • In the transmission process of the IPTV code stream there are many risks, and the content of the code stream is easily falsified or replaced, which may cause non-authenticated content to be played at the terminal, which is not in conformity with the national security policy.
  • DRM Digital Rights Management
  • MD5 Message Digest 5, message digest algorithm fifth edition
  • the main principle of MD5 security detection is: the source end calculates the MD5 value by using the media data and the security key, and the peer end uses the same algorithm to calculate the received media data and the MD5 of the security key, and detects whether the media stream has been tampered by comparing the MD5 value.
  • a single security key cannot guarantee the security of encryption.
  • the security key has the risk of being tampered with during transmission or other processes.
  • the insecure key is likely to affect the security of the media stream.
  • the invention provides a method, device and system for safely playing interactive network television channels, In the case that the media data does not need to be modified, the security of the media stream in the transmission process at both ends can be ensured.
  • a method for securely playing an interactive network television channel is applied to a signature server, the method comprising:
  • the method further comprises: obtaining a transmission private key.
  • obtaining the transmission private key comprises:
  • the predetermined algorithm comprises:
  • Elliptic curve ECC algorithm RSA algorithm
  • digital signal algorithm DSA algorithm digital signal algorithm
  • DH algorithm DH algorithm
  • the received interactive network television IPTV code stream is digitally signed according to a predetermined algorithm by using a transmission private key, and generating the signature information stream includes:
  • the transmission private key is obtained by the DES symmetric decryption algorithm
  • the embodiment of the invention further provides a method for securely playing an interactive network television channel, which is applied to a signature detection server, and the method includes:
  • the validity of the transmission public key is verified by a predetermined algorithm by using a digital signature of the transmission public key;
  • the verified IPTV code stream is transmitted to the terminal to be played.
  • the method further comprises: obtaining a transmission public key.
  • obtaining the transmission public key comprises:
  • the predetermined algorithm comprises:
  • Elliptic curve ECC algorithm RSA algorithm
  • digital signal algorithm DSA algorithm digital signal algorithm
  • DH algorithm DH algorithm
  • the method further includes: when the transmission public key verification fails and/or the legality verification fails, the IPTV code stream is alerted.
  • the validity verification of the transmission public key by a predetermined algorithm by using a digital signature of the transmission public key comprises:
  • the validity of the transmission public key is verified by the root public key and the digital signature information of the transmission public key.
  • performing signature verification on the interactive network television IPTV code stream by using the received signature information stream and the transmitted transmission public key comprises:
  • the calculated digest value is compared with the decrypted original digest value, and the verification is passed, otherwise the verification fails.
  • the present invention also provides an apparatus for securely playing an interactive network television channel, which is disposed on a signature server and includes:
  • the signature module is configured to digitally sign the received interactive network television IPTV code stream by using a transmission private key according to a predetermined algorithm to generate a signature information stream;
  • the first transmission module is configured to transmit the IPTV code stream and the signature information stream to the signature detection server, so that the signature detection server performs detection and verification by using the transmission public key.
  • the device further comprises: a first obtaining module, configured to obtain a transmission private key.
  • the obtaining, by the first obtaining module, the transmission private key refers to:
  • the signature module comprises:
  • a private key unit configured to obtain a transport private key by using a DES symmetric decryption algorithm
  • a digest unit configured to calculate a digest value of the IPTV code stream
  • An encryption unit configured to encrypt the digest using a predetermined algorithm and the transport private key
  • an encapsulating unit configured to encapsulate digest encryption information of the IPTV code stream, to generate the signature information stream.
  • the embodiment of the present invention further provides an apparatus for securely playing an interactive network television channel, which is disposed on the signature detection server, and includes:
  • a first verification module configured to perform validity verification on the transmission public key according to a predetermined algorithm by using a digital signature of the transmission public key
  • a second verification module configured to perform signature verification on the interactive network television IPTV code stream by using the received signature information stream and the transmitted transmission public key
  • the second transmission module is configured to transmit the verified IPTV code stream to the terminal to be played.
  • the device further comprises: a second obtaining module, configured to obtain a transmission public key.
  • the obtaining, by the second obtaining module, the transmission public key refers to:
  • the apparatus further includes: an alarm module, configured to alert the IPTV code stream when the transmission public key verification fails and/or the legality verification fails.
  • an alarm module configured to alert the IPTV code stream when the transmission public key verification fails and/or the legality verification fails.
  • the first verification module uses the digital signature of the transmission public key to verify the legality of the transmission public key according to a predetermined algorithm:
  • the validity of the transmission public key is verified by the root public key and the digital signature information of the transmission public key.
  • the second verification module comprises:
  • An extracting unit configured to extract encrypted data from a signature structure of the IPTV code stream
  • a calculating unit configured to calculate a digest value of the IPTV code stream
  • a decryption unit configured to decrypt the digest value by using a predetermined algorithm and a transmission public key that is verified to obtain a digest value of the original IPTV code stream
  • the comparison unit is configured to compare the calculated digest value with the decrypted original digest value, and the verification is passed, otherwise the verification fails.
  • the embodiment of the invention further provides a system for securely playing an interactive network television channel, comprising: a signature server and a signature detection server.
  • the signature server digitally signs the received interactive network television IPTV code stream by using a transmission private key according to a predetermined algorithm to generate a signature information stream;
  • the signature server transmits the IPTV code stream and the signature information stream to the signature detection server;
  • the signature detection server validates the validity of the transmission public key according to a predetermined algorithm by using a digital signature of the transmission public key;
  • the signature detection server uses the received signature information stream and the transmitted public key to verify the signature verification of the interactive network television IPTV code stream;
  • the signature detection server transmits the verified IPTV code stream to the terminal to be played.
  • the system further includes: a key management server, the signature server receives a transmission private key issued by the key management server after being symmetrically encrypted by the data encryption standard DES,
  • the signature detection server receives the transmission public key delivered by the key management server through the certificate, and the certificate includes a signature of the transmission public key and the root private key to transmit the public key.
  • the embodiment of the invention further provides a storage medium, wherein the storage medium comprises a stored program, wherein the program is executed to perform the above-mentioned method for securely playing the interactive network television channel on the signature server side.
  • the embodiment of the present invention further provides a storage medium, where the storage medium includes a stored program, wherein the program is executed to perform the above-mentioned interactive network television channel secure playing method applied to the signature detecting server side.
  • the solution provided by the present invention overcomes the problem of insufficient security in the existing IPTV code stream security transmission technology, and the signature information uses a strong security transmission of a two-level key in the IPTV network, that is, an IPTV code stream.
  • the digital signature of the digital signature and the public key certificate are generated using two different levels of keys, which achieves the IPTV live broadcast security tamper-proof effect, and the content security is effectively improved.
  • FIG. 1 is a flowchart of a method for securely playing an interactive network television channel according to the present invention
  • FIG. 2 is a flowchart of a method for securely playing an interactive network television channel according to the present invention
  • FIG. 3 is a structure of an apparatus for securely playing an interactive network television channel according to the present invention schematic diagram
  • FIG. 4 is a schematic structural diagram of an apparatus for securely playing an interactive network television channel according to the present invention.
  • FIG. 5 is a schematic structural diagram of a system for securely playing an interactive network television channel according to the present invention.
  • Embodiment 6 is a security key management diagram of Embodiment 2 of the present invention.
  • FIG. 7 is a schematic diagram of a digital signature process according to Embodiment 2 of the present invention.
  • FIG. 8 is a schematic diagram of a signature verification process according to Embodiment 2 of the present invention.
  • FIG. 9 is a diagram of a signature information format according to Embodiment 2 of the present invention.
  • an embodiment of the present invention provides a method for securely playing an interactive network television channel, which is applied to a signature server, and the method includes:
  • the method further comprises: obtaining a transmission private key.
  • obtaining the transmission private key includes:
  • Received key management server transmitted through the data encryption standard DES symmetrically encrypted transmission Private key.
  • the predetermined algorithm includes: an elliptic curve ECC algorithm, an RSA algorithm, a digital signal algorithm DSA (Digital Signature Algorithm) algorithm, and a DH algorithm.
  • the received interactive network television IPTV code stream is digitally signed according to a predetermined algorithm by using a transmission private key, and generating the signature information flow includes:
  • the transmission private key is obtained by the DES symmetric decryption algorithm
  • an embodiment of the present invention further provides a method for securely playing an interactive network television channel, which is applied to a signature detection server, and the method includes:
  • the validity of the transmission public key is verified by a predetermined algorithm by using a digital signature of the transmission public key;
  • the verified IPTV code stream is transmitted to the terminal to be played.
  • the two verifications in the embodiment of the present invention respectively verify the transmission public key required for decryption, and verify the IPTV code stream; first verify the validity of the transmission public key, and then use the legal transmission public key to verify the IPTV code stream. .
  • the method further comprises: obtaining a transmission public key.
  • obtaining the transmission public key includes:
  • the predetermined algorithm includes: an elliptic curve ECC algorithm, an RSA algorithm, a digital signal algorithm DSA algorithm, and a DH algorithm.
  • the method further includes: when the transmission public key verification fails and/or the legality verification fails, the IPTV code stream is alerted.
  • the legality verification of the transmission public key by using a digital signature of the transmission public key according to a predetermined algorithm includes:
  • the validity of the transmission public key is verified by the root public key and the digital signature information of the transmission public key.
  • the signature verification of the interactive network television IPTV code stream by using the received signature information stream and the transmitted transmission public key includes:
  • the calculated digest value is compared with the decrypted original digest value, and the verification is passed, otherwise the verification fails.
  • the IPTV code stream is transmitted by using a transmission private key according to a specific algorithm, and the media stream and the signature information are transmitted to the opposite end; the opposite end of the code stream and the signature information are verified by a specific algorithm using the transmission public key, and the verification is successfully played. IPTV code stream.
  • an embodiment of the present invention provides an apparatus for securely playing an interactive network television channel, which is installed in a signature server, and includes:
  • the signature module is configured to digitally sign the received interactive network television IPTV code stream by using a transmission private key according to a predetermined algorithm to generate a signature information stream;
  • the first transmission module is configured to transmit the IPTV code stream and the signature information stream to the signature detection server, so that the signature detection server performs detection and verification by using the transmission public key.
  • the device further includes: a first obtaining module configured to obtain a transmission private key.
  • the signature module includes:
  • a private key unit configured to obtain a transport private key by using a DES symmetric decryption algorithm
  • a digest unit configured to calculate a digest value of the IPTV code stream
  • An encryption unit configured to encrypt the digest using a predetermined algorithm and the transport private key
  • an encapsulating unit configured to encapsulate digest encryption information of the IPTV code stream, to generate the signature information stream.
  • an apparatus for securely playing an interactive network television channel is provided in a signature detection server, including:
  • a first verification module configured to perform validity verification on the transmission public key according to a predetermined algorithm by using a digital signature of the transmission public key
  • a second verification module configured to perform signature verification on the interactive network television IPTV code stream by using the received signature information stream and the transmitted transmission public key
  • the second transmission module is configured to transmit the verified IPTV code stream to the terminal to be played.
  • the device further includes: a second obtaining module configured to obtain a transmission public key.
  • the obtaining the public key by the second obtaining module refers to:
  • the device further includes: an alarm module configured to alert the IPTV code stream when the transmission public key verification fails and/or the legality verification fails.
  • the first verification module uses the digital signature of the transmission public key to verify the legality of the transmission public key according to a predetermined algorithm:
  • the validity of the transmission public key is verified by the root public key and the digital signature information of the transmission public key.
  • the second verification module includes:
  • An extracting unit configured to extract encrypted data from a signature structure of the IPTV code stream
  • a calculating unit configured to calculate a digest value of the IPTV code stream
  • a decryption unit configured to decrypt the digest value by using a predetermined algorithm and a transmission public key that is verified to obtain a digest value of the original IPTV code stream
  • the comparison unit is configured to compare the calculated digest value with the decrypted original digest value, and the verification is passed, otherwise the verification fails.
  • a system for securely playing an interactive network television channel includes: a signature server and a signature detection server.
  • the signature server digitally signs the received interactive network television IPTV code stream by using a transmission private key according to a predetermined algorithm to generate a signature information stream;
  • the signature server transmits the IPTV code stream and the signature information stream to the signature detection server;
  • the signature detection server validates the validity of the transmission public key according to a predetermined algorithm by using a digital signature of the transmission public key;
  • the signature detection server uses the received signature information stream and the transmitted public key to verify the signature verification of the interactive network television IPTV code stream;
  • the signature detection server transmits the verified IPTV code stream to the terminal to be played.
  • the system further includes: a key management server, the signature server receives a transmission private key that is sent by the key management server after being symmetrically encrypted by the data encryption standard DES, and the signature detection server receives the key management server and sends the certificate through the certificate.
  • the transmission public key, the certificate includes a signature of the transmission public key and the root private key to transmit the public key.
  • the format of the transport public key certificate is:
  • the method for safely broadcasting an IPTV channel includes the following steps:
  • the source provides an IPTV media stream, such as an RTP stream output by the IPTV server;
  • the signature server receives the RTP stream and signs it according to a specific algorithm.
  • the signature information stream is strongly transmitted in the IPTV network using a two-level key, that is, the digital signature of the media stream and the digital signature of the public key certificate are used in two levels. Key generation; output RTP stream and signature information by unicast or multicast;
  • the signature detection server receives the RTP stream and the signature information, performs signature verification according to a specific algorithm, and alerts the code stream that fails verification;
  • the IPTV terminal plays the media stream that is verified by the IPTV terminal.
  • the signature object, the IPTV channel code stream in this embodiment is the media data encapsulated in the RTP (Real-time Transport Protocol) format, for example, the IPTV content provider outputs the TS (Transport Stream) through the encoder. Then, through the transcoding server, find the key frame output RTP stream.
  • RTP Real-time Transport Protocol
  • this embodiment uses a strong secure transmission of a two-level key, and the digital signature of the IPTV stream and the digital signature of the public key certificate are generated using two different levels of keys, and the IPTV stream is generated.
  • the digital signature uses the transport private key to verify the use of the transport public key.
  • the transmission private key is symmetrically encrypted by the key management server and sent to the signature server by the DES, and the transmission public key is sent to the signature detection server in the form of a certificate (the certificate includes the secure transmission public key and the root private key to securely transmit the public key. Signature)
  • the signature detection server receives the secure transmission public key certificate and the root public key, it needs to use the root public key to verify the validity of the secure transmission public key.
  • the signature server receives the media RTP stream, and uses the elliptic curve ECC algorithm to sign, because finally the media data is displayed in the terminal, so only the TS data is signed, the flow is as follows:
  • Signature information transmission is divided into two types: in-band transmission and out-of-band transmission;
  • Out-of-band transmission is to separately transmit media data and signature data, monitor the content of the transmission, and find that after the content has been tampered with, it can promptly alert and not modify the original media stream.
  • the signature information is separately encapsulated into an RTP: the PT field is modified to 99, and the remaining RTP header data is consistent with the corresponding media RTP packet, and the signature information structure is placed in the payload.
  • the verification of the code stream signature is performed according to the difference of the signature transmission mode, and the deployment of the signature detection module is correspondingly distinguished;
  • the terminal needs to integrate the signature verification module, receive the IPTV media stream, perform signature verification on an RTP-by-RT packet, and alarm the code stream that fails verification.
  • the signature detection server is separately deployed in front of the terminal, and the IPTV media stream and the signature information stream are received at the same time, and the IPTV source stream data is buffered.
  • the signature packet is received, according to the RTP packet header (Seq+Timestamp) and The RTP extension header searches for the source data packet of the IPTV, and then performs signature verification to alert the code stream source that fails verification; as shown in FIG. 9, the header is an RTP extension header, followed by the header of the signature information, and then Plus signature information.
  • the signature verification also uses the elliptic curve ECC algorithm.
  • the flow is as follows:
  • Verification summary comparing the calculated digest value with the decrypted original media summary, and agreeing that the verification is passed, otherwise the verification fails;
  • the terminal plays, and the terminal plays the media data that has passed the verification, and the media data that does not meet the signature, that is, the verification fails, is refused to play.
  • the signature information is strongly transmitted in the IPTV network using two levels of keys, that is, the digital signature of the IPTV code stream and the digital signature of the public key certificate are used in two levels.
  • the key generation achieves the IPTV live broadcast security anti-tamper effect, and the content security is effectively improved, thereby solving the problem of insufficient security in the existing IPTV code stream security transmission technology.

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

La présente invention concerne un procédé, un dispositif, et un système de lecture sécurisée sur un canal de télévision à protocole Internet. Le procédé consiste à : signer numériquement un flux codé de télévision sur IP (IPTV) reçu à l'aide d'une clé privée de transmission selon un algorithme prédéterminé, afin de générer un flux d'informations de signature ; et transmettre le flux codé IPTV et le flux d'informations de signature à un serveur de détection de signature de sorte que le serveur de détection de signature exécute un contrôle de détection à l'aide d'une clé publique de transmission. Les informations de signature de la présente invention utilisent une transmission extrêmement sécurisée, avec des clés secrètes de deux étages dans un réseau IPTV. En d'autres termes, la signature numérique du flux codé IPTV et la signature numérique d'un certificat de clé publique sont générées à l'aide des clés secrètes de deux étages différents, ce qui permet de garantir une diffusion IPTV en direct sûre et anti-falsification, et d'améliorer la sécurité du contenu.
PCT/CN2017/089940 2016-06-28 2017-06-26 Procédé, dispositif, et système de lecture sécurisée sur un canal de télévision à protocole internet WO2018001193A1 (fr)

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CN201610486957.0A CN107547918A (zh) 2016-06-28 2016-06-28 一种交互式网络电视频道安全播放的方法、装置和系统
CN201610486957.0 2016-06-28

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CN114640487A (zh) * 2020-12-16 2022-06-17 慧盾信息安全科技(北京)有限公司 一种避免中断视频监控设备运行的gb35114标准实时检测系统和方法
CN114640487B (zh) * 2020-12-16 2024-03-12 慧盾信息安全科技(北京)有限公司 一种避免中断视频监控设备运行的gb35114标准实时检测系统和方法
CN115914677A (zh) * 2022-09-19 2023-04-04 上海辰锐信息科技有限公司 一种智能视频安全联网装置、服务器

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