WO2012129929A1 - Procédé, système et appareil pour la transmission sécurisée de message multimédia - Google Patents

Procédé, système et appareil pour la transmission sécurisée de message multimédia Download PDF

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Publication number
WO2012129929A1
WO2012129929A1 PCT/CN2011/083613 CN2011083613W WO2012129929A1 WO 2012129929 A1 WO2012129929 A1 WO 2012129929A1 CN 2011083613 W CN2011083613 W CN 2011083613W WO 2012129929 A1 WO2012129929 A1 WO 2012129929A1
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WO
WIPO (PCT)
Prior art keywords
encrypted information
key
message
receiver
intermediate device
Prior art date
Application number
PCT/CN2011/083613
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English (en)
Chinese (zh)
Inventor
卢艳
丁欣
陈军
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Publication of WO2012129929A1 publication Critical patent/WO2012129929A1/fr

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Classifications

    • 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
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
    • H04L9/0819—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)
    • H04L9/0825—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) using asymmetric-key encryption or public key infrastructure [PKI], e.g. key signature or public key certificates
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L51/00—User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/06—Network architectures or network communication protocols for network security for supporting key management in a packet data network
    • H04L63/062—Network architectures or network communication protocols for network security for supporting key management in a packet data network for key distribution, e.g. centrally by trusted party
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/12—Messaging; Mailboxes; Announcements

Definitions

  • the present invention relates to the field of communications, and in particular, to a method, system and apparatus for secure transmission of media messages.
  • multimedia messaging services such as MMS, (mobile) email, and instant messaging services are becoming more and more widely used.
  • Some service systems, such as MMS, voicemail, instant messaging, etc. before the server sends the media message to the receiver, the server usually sends a notification message of the multimedia message to the receiver through other communication channels, such as the PUSH route. After receiving the notification message, the media message is received by the server according to the communication situation.
  • Figure 1 illustrates the process by which the sender sends media information to the recipient:
  • the server stores the media message M, and generates a message S, such as a notification message, and sends the message S to the receiver through the service system 2;
  • the receiver accesses the server according to the message S and obtains the media content M.
  • the above solution brings a convenient and fast user experience to the user, and at the same time brings a series of security transmission problems.
  • the notification message and the media message may be read by an illegal recipient, thereby causing the sender's information to leak.
  • the technical problem to be solved by the present invention is to provide a method, system and device for secure transmission of media messages to solve the problem of sender information leakage in case of a false alarm.
  • the present invention provides a method for secure transmission of media messages, including:
  • the sender encrypts the media message by using the first key to obtain the first encrypted information, encrypts the first key to obtain the second encrypted information, and sends the first encrypted information and the second encrypted information.
  • the intermediate device receives the first encrypted information and the second encrypted information, generates a message corresponding to the media message, and encrypts the message corresponding to the media message by using the second key to obtain a third encryption.
  • Receiving, by the receiving party, the third encrypted information and the fourth encrypted information, decrypting the fourth encrypted information by using the private key of the receiving party to obtain the second key, and decrypting the second key by using the second key Obtaining, according to the third encrypted information, the message corresponding to the media message, accessing the intermediate device according to the message corresponding to the media message, acquiring the first encrypted information and the second encrypted information, and utilizing Decrypting the second encrypted information to obtain the first key, and decrypting the first encrypted information by using the first key to obtain the media message.
  • the step of the sender encrypting the first key to obtain the second encrypted information comprises: the sending party encrypting the first key with the receiver public key to obtain the second encrypted information;
  • the step of the intermediate device encrypting the second key to obtain the fourth encrypted information comprises: the intermediate device encrypting the second key by using the receiving public key to obtain the fourth encrypted information.
  • the message corresponding to the media message is a notification message generated by the intermediate device according to the transport layer information.
  • the symmetric encryption algorithm for encrypting or decrypting the media message or the first encrypted information by the sender and the receiver is pre-negotiated by the sender and the receiver, or is temporarily sent by the sender or the receiver. of;
  • the symmetric encryption algorithm for encrypting or decrypting the message or the third encrypted information corresponding to the media message by the intermediate device and the receiving party is pre-negotiated by the intermediate device and the receiving party, or is received by the intermediate device or The party temporarily informs the other party;
  • the asymmetric encryption algorithm for encrypting or decrypting the first key or the second encrypted information by the sender and the receiver is pre-negotiated by the sender and the receiver;
  • the intermediate device and the receiver encrypt or decrypt the second key or the fourth encrypted information
  • the asymmetric encryption algorithm is pre-negotiated by the intermediate device and the receiver.
  • the invention also provides a system for secure transmission of media messages, comprising:
  • a cryptographic module of the sender configured to: encrypt the media message by using the first key to obtain the first encrypted information, and encrypt the first key to obtain the second encrypted information;
  • a sending module of the sender configured to: send the first encrypted information and the second encrypted information
  • a receiving module of the intermediate device configured to: receive the first encrypted information and the second encrypted information
  • a message generating module of the intermediate device configured to: generate a message corresponding to the media message;
  • the encryption module of the intermediate device is configured to: encrypt the message corresponding to the media message by using a second key Obtaining third encrypted information, and encrypting the second key to obtain fourth encrypted information;
  • a sending module of the intermediate device configured to: send the third encrypted information and the fourth encrypted information
  • the receiving module of the receiving end is configured to: receive the third encrypted information and the fourth encrypted information;
  • a decryption module of the receiver configured to: decrypt the fourth encrypted information by using the private key of the receiver to obtain the second key, and decrypt the third encrypted information by using the second key Obtaining the message corresponding to the media message; and decrypting the second encrypted information by using the private key to obtain the first key, and decrypting the first encrypted information by using the first key to obtain the Media message; and
  • the access module of the receiver is configured to: access the intermediate device according to the message corresponding to the media message, and acquire the first encrypted information and the second encrypted information.
  • the sender's encryption module is configured to encrypt the first key by using the receiver public key to obtain the second encrypted information
  • the encryption module of the intermediate device is configured to add the second key by using the receiver public key
  • the fourth encrypted information is obtained in a secret manner.
  • the symmetric encryption algorithm for encrypting or decrypting the media message or the first encrypted information by the encryption module or the decryption module of the sender and the receiver is pre-negotiated by the sender and the receiver, or by the sender or the receiver.
  • the party temporarily informs the other party;
  • a symmetric encryption algorithm used by the encryption module or the decryption module of the intermediate device and the receiver to encrypt or decrypt the message corresponding to the media message or the third encryption information is pre-negotiated by the intermediate device and the receiver , or, by the intermediary device or the recipient to temporarily notify the other party;
  • the asymmetric encryption algorithm for encrypting or decrypting the first key or the second encrypted information by the encryption module or the decryption module of the sender and the receiver is pre-negotiated by the sender and the receiver; the intermediate device The asymmetric encryption algorithm for encrypting or decrypting the second key or the fourth encrypted information with the encryption module or the decryption module of the receiver is pre-negotiated by the intermediate device and the receiver.
  • the present invention also provides an intermediate device for transmitting a media message, including:
  • a receiving module configured to: receive the first encrypted information and the second encrypted information sent by the sender of the media message, where the first encrypted information is obtained by encrypting, by the sender, the media message by using the first key, The second encrypted information is obtained by the sender encrypting the first key;
  • a message generating module configured to: generate a message corresponding to the media message
  • An encryption module configured to: encrypt the message corresponding to the media message by using a second key to obtain third encrypted information, and encrypt the second key to obtain fourth encrypted information; and a sending module, The method is configured to: send the third encrypted information and the fourth encrypted information to a receiver of the media message;
  • the message corresponding to the media message is used to indicate a manner in which the receiver obtains the first encrypted information and the second encrypted information.
  • the second encrypted information is obtained by the sender encrypting the first key by using a receiver public key;
  • the encryption module is configured to encrypt the second key with the recipient public key to obtain the fourth encrypted information.
  • the invention also provides a media message receiver, comprising:
  • a receiving module configured to: receive third encrypted information and fourth encrypted information sent by the intermediate device;
  • a decryption module configured to: decrypt the fourth encrypted information with a recipient private key to obtain a second key, and decrypt the third encrypted information by using the second key to obtain a message corresponding to the media message; Decrypting the second encrypted information by the private key to obtain a first key, and decrypting the first encrypted information by using the first key to obtain the media message;
  • an access module configured to: access the intermediate device according to the message corresponding to the media message, and acquire the first encrypted information and the second encrypted information.
  • the above solution uses a pair of public and private keys and an encryption key to encrypt the content to be transmitted (such as a media message, a key or a notification message), and finally transmits the notification message or the media message securely to the legitimate recipient, if the error is sent or Intercepted by a third party, media messages or notification messages will not be revealed.
  • FIG. 1 is a schematic diagram of a sender sending media information to a receiver
  • FIG. 2 is a schematic diagram of an embodiment of a method for secure transmission of media messages according to the present invention
  • FIG. 3 is a schematic flowchart of a process performed by a sender in an embodiment of the present invention.
  • FIG. 4 is a schematic flowchart of execution performed by an intermediate device according to an embodiment of the present invention.
  • FIG. 5 is a schematic flowchart of a process performed by a receiver in an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a module of a system for secure transmission of media messages according to the present invention.
  • Embodiments of the present invention propose a method and system for secure transmission of media messages, using a pair of public and private keys and an encryption key to transmit content (such as media messages, keys or notification messages) Encryption is performed, and the notification message or the media message is finally transmitted to the legitimate recipient securely. If the error is sent or intercepted by a third party, the media message or the notification message will not be leaked.
  • content such as media messages, keys or notification messages
  • the method for secure transmission of media messages in the embodiment of the present invention includes:
  • Step 201 The sender encrypts the media message M by using the first key K1 to obtain the first encrypted information C, and encrypts the first key K1 by using the public key of the receiver to obtain the second encrypted information, and sends the first Encrypting information C and second encrypted information;
  • Step 202 The intermediate device receives the first and second encrypted information, generates a message S corresponding to the media message M, and encrypts the message by using the second key K2 to obtain a third encrypted information S, and uses The public key of the receiver encrypts the second key K2 to obtain the fourth encrypted information K2, and transmits the third encrypted information S, and the fourth encrypted information ⁇ 2;
  • Step 203 The receiver receives the third and fourth encrypted information, decrypts the fourth encrypted information ⁇ 2 with its private key, obtains the second key ⁇ 2, and decrypts by using the second key ⁇ 2.
  • the third encrypted information S is obtained by the message S, and the first encrypted information C and the second encrypted information are obtained by accessing the intermediate device according to the message, and the second key is decrypted by using the private key thereof.
  • the first information K1 is obtained by encrypting the information, and the first encrypted information C is decrypted by the first key K1 to obtain the media message.
  • the receiver has a pair of public and private keys
  • FIG. 3 illustrates steps performed by a sender in an embodiment of the present invention:
  • Step 301 Create media content ⁇ ;
  • the format and type of the media message are not limited.
  • the format may be data in the MIME format, including but not limited to MMS, email, voicemail, and the like.
  • Step 304 using an asymmetric encryption algorithm (for example, it is agreed to use RSA (the public key encryption algorithm) and the public key of the receiver to encrypt K1, and the result is set to ⁇ ;
  • Step 303 and step 304 are in no particular order.
  • Step 305 A sends C and ⁇ to the intermediate device.
  • Figure 4 illustrates the steps performed by the intermediate device in an embodiment of the invention:
  • Step 401 The intermediate device receives C and ⁇ ;
  • Step 402 Generate a message S corresponding to the media message M (such as a short message notification), and randomly generate a key K2;
  • the message is a notification message generated by the intermediate device according to the transport layer information, for example, the notification message carries sender information and receiver information.
  • Step 403 Obtain S by using a symmetric encryption algorithm (such as a convention using AES (Advanced Encryption Standard) algorithm) and K2 encryption S;
  • a symmetric encryption algorithm such as a convention using AES (Advanced Encryption Standard) algorithm
  • K2 encryption S K2 encryption S
  • Step 404 Encrypt K2 with the public key of the receiver to obtain K2, ;
  • Step 405 Forward S, and ⁇ 2 to the recipient through the service system (for example, a short message center).
  • the service system for example, a short message center.
  • FIG. 5 illustrates the steps performed by the recipient in an embodiment of the invention:
  • Step 501 Receive S' and ⁇ 2, ;
  • Step 502 Decrypt ⁇ 2 with the recipient's private key to obtain ⁇ 2;
  • Step 503 Decrypt S' with ⁇ 2 to obtain S;
  • Step 504 Acquire data C and ⁇ according to S accessing the intermediate device
  • Step 505 Decrypting ⁇ by using the same asymmetric encryption algorithm as the sender and the private key of the receiver;
  • Step 506 Obtain media content using the same symmetric encryption algorithm as the sender and K1 decryption C.
  • the symmetric encryption algorithm used by the sender and receiver to encrypt or decrypt ⁇ or C is The sender and the receiver pre-negotiate, or the sender or the receiver temporarily informs the other party;
  • the symmetric encryption algorithm used by the intermediate device and the receiver to encrypt or decrypt the S or S is the middle The device and the receiver pre-negotiate, or the intermediary device or the receiver temporarily informs the other party;
  • the asymmetric encryption algorithm used by the sender and the receiver to encrypt or decrypt the K1 or ⁇ is pre-negotiated by the sender and the receiver;
  • the asymmetric encryption algorithm used by the intermediate device and the receiver to encrypt or decrypt the K2 or K2 is pre-negotiated by the intermediate device and the recipient.
  • the notification message may be an "in-band" notification message mode, that is, the transmission path and the media message are the same, and the embodiment of the present invention is also applicable to the case.
  • the embodiment of the present invention is also applicable to media message delivery across service types, that is, the media message service type sent by the sender is different from the media message service type received by the receiver.
  • the intermediate device may be the sender.
  • the service server can also be the service server of the receiver, and can also implement gateway devices for converting two service types.
  • the embodiment of the present invention does not limit the specific implementation entity of the intermediate device.
  • the embodiment of the invention further provides an intermediate device for transmitting a media message, which includes:
  • a receiving module configured to: receive the first encrypted information and the second encrypted information sent by the sender of the media message, where the first encrypted information is obtained by encrypting, by the sender, the media message by using the first key, The second encrypted information is obtained by the sender encrypting the first key;
  • a message generating module configured to: generate a message corresponding to the media message
  • An encryption module configured to: encrypt the message corresponding to the media message by using a second key to obtain third encrypted information, and encrypt the second key to obtain fourth encrypted information; and a sending module, The method is configured to: send the third encrypted information and the fourth encrypted information to a receiver of the media message; The message corresponding to the media message is used to indicate a manner in which the receiver acquires the first encrypted information and the second encrypted information.
  • the second encrypted information may be obtained by the sender encrypting the first key by using a receiver public key
  • the encryption module may be configured to encrypt the second key with the recipient public key to obtain the fourth encrypted information.
  • the embodiment of the invention provides a media message receiver, which includes:
  • a receiving module configured to: receive third encrypted information and fourth encrypted information sent by the intermediate device;
  • a decryption module configured to: decrypt the fourth encrypted information with a recipient private key to obtain a second key, and decrypt the third encrypted information by using the second key to obtain a message corresponding to the media message; Decrypting the second encrypted information by the private key to obtain a first key, and decrypting the first encrypted information by using the first key to obtain the media message;
  • an access module configured to: access the intermediate device according to the message corresponding to the media message, and acquire the first encrypted information and the second encrypted information.
  • the embodiment of the present invention further provides a system for secure transmission of media messages.
  • the system includes but is not limited to:
  • the encryption module of the sender is configured to encrypt the media message by using the first key to obtain the first encrypted information, and encrypt the first key to obtain the second encrypted information;
  • the sending module of the sender is configured to send the first and second encrypted information
  • the receiving module of the intermediate device is configured to receive the first and second encrypted information
  • a message generating module of the intermediate device configured to generate a message corresponding to the media message
  • the encryption module of the intermediate device is configured to encrypt the message by using a second key to obtain third encrypted information, and to The second key encryption obtains the fourth encrypted information
  • the sending module of the intermediate device is configured to send the third and fourth encrypted information;
  • the receiving module of the receiving party is configured to receive the third and fourth encrypted information;
  • Decrypting module of the receiving party configured to decrypt the fourth encrypted information with its private key to obtain the second key, and decrypt the third encrypted information by using the second key to obtain the message; Decrypting the second encrypted information with the private key to obtain the first key, and decrypting the first encrypted information by using the first key to obtain the media message;
  • the access module of the receiver is configured to access the intermediate device according to the message, and acquire the first encrypted information and the second encrypted information.
  • the cryptographic module of the sender obtains the public key of the receiver by using a secure method before encrypting the first key, and encrypts the first key by using the public key of the receiver.
  • the encryption module of the intermediate device obtains the public key of the receiver by using a secure method before encrypting the second key, and then using the public key of the receiver to The second key encryption obtains the fourth encrypted information.
  • the symmetric encryption algorithm used by the encryption module or the decryption module of the sender and the receiver to encrypt or decrypt the media message or the first encrypted information is pre-negotiated by the sender and the receiver, or , the sender or the receiver temporarily informs the other party;
  • the symmetric encryption algorithm used by the intermediate device and the encryption module or the decryption module of the receiver to encrypt or decrypt the message or the third encrypted information is pre-negotiated by the intermediate device and the receiver, or by an intermediate device or The receiving party temporarily notifies the other party; the asymmetric encryption algorithm used by the encryption module or the decryption module of the sender and the receiver to encrypt or decrypt the first key or the second encrypted information is the sender and the receiver. Pre-negotiated;
  • the asymmetric encryption algorithm used by the intermediate device and the recipient's encryption module or decryption module to encrypt or decrypt the second or fourth encrypted information is pre-negotiated by the intermediate device and the recipient.
  • the intermediate device since the intermediate device cannot know K1, the media content is opaque to the intermediate device, and the security is increased; when the intermediate device forwards S and K2 to the ⁇ through the service system, considering the content length problem, It can be sent separately in two.
  • a program that instructs the associated hardware, such as a read-only memory, a magnetic disk, or an optical disk.
  • all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits.
  • each module/unit in the foregoing embodiment may be implemented in the form of hardware, or may be implemented in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.
  • the above method and system use a pair of public and private keys and an encryption key to encrypt the content to be transmitted (such as a media message, a key or a notification message), and finally transmit the notification message or the media message to the legitimate recipient securely. Sended or intercepted by a third party, media messages or notification messages will not be revealed.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Information Transfer Between Computers (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

La présente invention concerne un procédé, un système, et un appareil destinés à la transmission sécurisée d'un message multimédia. Ce procédé fait intervenir un émetteur, un logiciel intermédiaire, et un récepteur. L'émetteur obtient une première information au moyen d'une première clé pour crypter un message multimédia, obtient une deuxième information cryptée en cryptant la première clé, et transmet ces deux informations cryptées. Le logiciel intermédiaire génère un message correspondant au message multimédia, obtient une troisième information cryptée au moyen d'une deuxième clé permettant de crypter le message, obtient une quatrième information cryptée par cryptage de la deuxième clé, et transmet la troisième et la quatrième des informations cryptées. Le récepteur obtient la deuxième clé au moyen d'une clé privée qui lui est propre pour décrypter la quatrième information cryptée, obtient le message au moyen de la deuxième clé pour décrypter la troisième information cryptée, accède au dispositif intermédiaire conformément au message, obtient la première et la deuxième des informations cryptées, obtient la première clé au moyen de la clé privée qui lui est propre pour décrypter la deuxième information cryptée, et obtient le message multimédia au moyen de la première clé pour décrypter la première information cryptée. Le procédé et le système de l'invention permettent de garantir la sécurité de l'information de l'émetteur.
PCT/CN2011/083613 2011-03-31 2011-12-07 Procédé, système et appareil pour la transmission sécurisée de message multimédia WO2012129929A1 (fr)

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CN201110080720.XA CN102740239B (zh) 2011-03-31 2011-03-31 媒体消息安全传输的方法和系统
CN201110080720.X 2011-03-31

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CN116233767B (zh) * 2023-03-20 2024-04-30 中国联合网络通信集团有限公司 集群对讲通信方法、装置、设备及存储介质

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