CN102404329A - Method for validating and encrypting interaction between user terminal and virtual community platform - Google Patents
Method for validating and encrypting interaction between user terminal and virtual community platform Download PDFInfo
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- CN102404329A CN102404329A CN2011103844319A CN201110384431A CN102404329A CN 102404329 A CN102404329 A CN 102404329A CN 2011103844319 A CN2011103844319 A CN 2011103844319A CN 201110384431 A CN201110384431 A CN 201110384431A CN 102404329 A CN102404329 A CN 102404329A
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Abstract
The invention discloses a method for validating and encrypting interaction between a user terminal and a virtual community platform. Uplink and downlink identities between the virtual community platform and the user terminal are firstly validated while the user terminal and the virtual community platform access, and the virtual community platform and the user terminal respectively determine the opposite legal identities and determine that the user terminal interacts after activating the services of the virtual community platform. The method comprises the following steps: when the uplink and downlink identities between the virtual community platform and the user terminal are validated and/or the virtual community platform interacts with the user terminal, obtaining the encrypted data by the data transmitter after encrypting the transmitted data through a key dispersion algorithm, and obtaining the decrypted data by the data receiver after decrypting the encrypted data through the key dispersion algorithm; validating the uplink and downlink identities between the virtual community platform and the user terminal through comparing the decrypted data with the transmitted data; and interacting the virtual community platform with the user terminal through the transmitted data which is obtained through the decrypted data. The method adopts the process key method, authorization with little calculation quantity, and encryption and decryption calculation to improve the safety of the system, so the method is suitable for the virtual community which requests high safety and privacy requirements.
Description
Technical field
The invention belongs to the data security technical field, be specifically related to mutual authentication encryption method between a kind of user terminal and virtual community platform.
Background technology
In recent years, the virtual community class that develops into of technology of Internet of things, mechanics of communication and Internet technology is used like application such as facebook, the twitter condition that provides the foundation.In virtual community was used, information gathering equipment need be shared with the mobile virtual community platform after collecting user data, and platform information is pushed to client terminals.
In the data interaction shared procedure that virtual community is used, need carry out safe handling to some data or information.Therefore, the data message of virtual community application has following characteristics:
(1) privacy: virtual community comprises business such as information service, corporations' service, friend-making, ecommerce; Relate to sensitive datas such as personal information, positional information, trading password; So information private property is particularly important, the information that prevents of should taking measures is illegally stolen.
(2) integrality of data: the integrality of Transaction Information also is the importance of virtual community traffic security requirement, prevent losing and repeating of information in the data transfer procedure, also will prevent arbitrarily distorting Transaction Information simultaneously.
(3) user is carried out authentication: the client that the virtual community system reply inserts is discerned authentication, confirms whether client is legal users, whether has opened this business.
For ensureing the Information Security in the reciprocal process, need effective security mechanism to guarantee privacy, integrality and the legitimacy of interactive information between user and the platform.The present invention therefore.
Summary of the invention
The object of the invention is to provide mutual authentication encryption method between a kind of user terminal and virtual community platform, has solved the information security issue in the user terminal and virtual community platform reciprocal process in the prior art.
In order to solve these problems of the prior art, technical scheme provided by the invention is:
Mutual authentication encryption method between a kind of user terminal and virtual community platform; Said user terminal and virtual community platform carry out the up-downgoing authentication between virtual community platform and user terminal earlier when inserting, said virtual community platform and user terminal are confirmed the other side's legal identity respectively and confirm to carry out alternately after user terminal has been opened the business of said virtual community platform; It is characterized in that said method comprise when between virtual community platform and user terminal during the up-downgoing authentication and/or virtual community platform and user terminal carry out the data after transmission side data when mutual obtains encryption to the data of transmission through the encryption of key decentralized algorithm, the data after the data of data receiver after to encryption obtain deciphering through key decentralized algorithm decryption processing; The up-downgoing authentication is relatively carried out authentication through the data after deciphering and the data of transmission between said virtual community platform and user terminal; Said virtual community platform and user terminal carry out obtaining the data of transmission through the data after the deciphering alternately.
Preferably; In the said method between virtual community platform and user terminal during the up-downgoing authentication transmission side data submit to the requesting party of authentication to adopt the identity cipher-text information after the encryption of key decentralized algorithm obtains encrypting to transmit for submitting the requesting party of authentication to user terminal identity information; The data receiver is the reciever that carries out authorization identifying, and the reciever that carries out authorization identifying carries out the identity data after decryption processing obtains deciphering through the key decentralized algorithm to the identity cipher-text information after encrypting; When the identity data after the deciphering was consistent with user terminal identity information, then authentication was passed through; Otherwise authentication is not passed through.
Preferably, virtual community platform and user terminal carry out when mutual transmission side data and adopt the encryption of key decentralized algorithm to obtain the data encrypted message to the data message to transmit in the said method; The data receiver carries out the data message after decryption processing obtains deciphering through the key decentralized algorithm to the data encrypted message after the data message is carried out the message completeness check.
Preferably, virtual community platform and user terminal are provided with master key in the said method, pass through the communication of process key between virtual community platform and user terminal.
Preferably, the process key produces through the key decentralized algorithm in the said method, and its formula is:
SESKey＝DIV(DK，Data)；
Wherein SESKey is the process key; Data is the logic OR computing of the process key generation factor and random number, and the process key generates the certain number that the factor is interim generation; DIV () computing is meant and carries out the key decentralized algorithm in the formula, is meant the master key MK of two length, and separate data is handled, and derives the key DK of two length; Wherein the DK left-half be earlier with the rightest 8 bytes of separate data as the input data,, obtain as encryption key with MK through the input data being carried out the 3DES computing with MK; Wherein the DK right half part is earlier the rightest 8 bytes of separate data to be negated the back as the input data; , obtain as encryption key with MK through the input data being carried out the 3DES computing with MK.
Preferably, the process key generation factor is that length is the numeral of 6 bytes in the said method.
Preferably, the message completeness check of data message may further comprise the steps in the said method:
The data message packet that 1) will send in order is divided into several data blocks, and the length of each data block is 8 bytes
2) when the length of last data block is 8 bytes, in last data block opening 16 systems numeral ' 8000000000000000 '; When curtailment 8 bytes of last data block, after last data block from the left side successively cover 16 systems numeral ' 8000000000000000 ' reach 8 bytes until the length of last data block;
4) adopt XOR to carry out encryption according to the DEA encryption mode successively to data block and obtain result of calculation with use MAC key; The MAC of 4 byte lengths of obtaining from the result of calculation left side.
To the Information Security problem in the virtual community application, guarantee the safety of customer position information, personal information, the information content etc., ensure the Information Security in the reciprocal process; Simultaneously; Under the premise that security is guaranteed; Consider the safety assurance method feasibility and with the efficient of transfer of data; Business demand to virtual community need be worked out suitable authentication, encryption method, and the requirement that satisfied business is carried out the invention provides a kind of authentication encryption method of using towards virtual community.
The present invention relates to user terminal and the mutual authentication encryption method of virtual community platform; Purview certification and information encryption are carried out in communication between virtual community platform and user terminal; Guarantee transport process safety of data and data transmission efficiency, make that system safety mechanism is more perfect.Nover practical of the present invention, the mode of employing process key through the less authentication of amount of calculation, encryption and decryption computing, improves the fail safe of system, is applicable to the virtual community application that higher safety and privacy require.
With respect to scheme of the prior art, advantage of the present invention is:
1) designed the key decentralized algorithm, through master key, mutual time and random number generative process key, the key that is adopted in each so mutual process is all different, and the security performance of system is provided greatly.
2) adopt bidirectional authentication mechanism between client and the platform, guaranteed both sides' legal access, guaranteed the fail safe that inserts.
3) use key all in MAC verification, the encryption is removed the safety issue that unique use master key brings from.
4) employing 3DES AES is realized easy and security performance is high.
5) security mechanism of design reduces the encryption of system, the amount of calculation of MAC verification under the premise that security is guaranteed, guarantees efficiency of transmission.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is further described:
Fig. 1 is the security mechanism block diagram during virtual community is used;
Fig. 2 is the descending identifying procedure of describing between client and the platform;
Fig. 3 is the up identifying procedure of describing between client and the platform;
Fig. 4 is encryption and decryption and the MAC checking process of describing between client and the platform;
Fig. 5 is computational methods of describing the MAC verification.
Embodiment
Below in conjunction with specific embodiment such scheme is further specified.Should be understood that these embodiment are used to the present invention is described and are not limited to limit scope of the present invention.The implementation condition that adopts among the embodiment can be done further adjustment according to the condition of concrete producer, and not marked implementation condition is generally the condition in the routine techniques.
Embodiment
Be illustrated in figure 1 as the system architecture diagram in the virtual community application among the present invention; Wherein user terminal is on the client 101 operation smart mobile phones, is linked in the virtual community platform 102 through mobile communications network 103, carries out the mutual of information.Client 101 all realizes up-downgoing authentication, MAC verification and encryption mechanism with the virtual community platform.110 circuits are depicted as descending verification process, the authentication of 102 pairs of clients 101 of implementation platform; 111 circuits are depicted as up verification process, realize the authentication of 101 pairs of platforms 102 of client; Shown in 112 circuits MAC checking procedure, the message integrity verification between implementation platform 102 and the client 101; Be ciphering process shown in 113 circuits, message encryption and decrypting process between implementation platform 102 and the client 101.
Below to the specific descriptions of 110～113 each steps:
Be illustrated in figure 2 as the descending identifying procedure that employing process key carries out.Descending identifying procedure is: client reads client identification CustomerID, and generates random number R nd; Utilize random number R nd, temporary key generation factor K ey_factor inner authenticate key to be done key disperse to obtain process cipher key T emp_Key1; With process cipher key T emp_Key1 CustomerID is 3DES and encrypts, obtain ciphertext En_Customer ID; With uploading behind packet (En_CustomerID+CustomerID+Key_factor+Rnd) the group bag; After platform receives that receiving packet resolves, utilize random number R nd, process key generation factor K ey_factor the internal authentication master key to be done key disperse to obtain process cipher key T emp_Key1; Of process cipher key T emp_Key1 EN_Customer ID is made and En_Cardnum to be done 3DE S deciphering obtain expressly data; Relatively whether data consistent with CustomerID, if unanimity then descending authentication pass through, if inconsistent then descending authentification failure.
Be illustrated in figure 3 as the up identifying procedure that employing process key carries out.Up identifying procedure is similar with descending identifying procedure, and its difference is that up identifying procedure is to send authentication data packet to client by platform, is judged the legitimacy of platform by client.And descending identifying procedure is to send authentication data packet to platform by client, is judged the legitimacy of client by platform.
Be illustrated in figure 4 as encryption and decryption and MAC checking process between client and the platform.Client is carried out key to the encryption key of working out and is disperseed to obtain interim encryption key Temp_Key1; Temp_Key1 encrypts message with the process encryption key, obtains ciphertext EN_Data; The MAC key is carried out key disperse to obtain interim MAC cipher key T emp_Key2; Client will be organized packet (En_Data+MAC) and upload; After platform receives packet and parsing, the MAC key of appointment is done key disperse to obtain process MAC cipher key T emp_Key2; With Temp_Key2 En_Data is calculated MAC1; Whether checking MAC1 equals MAC, like unequal then MAC verification failure, points out to client error; The encryption key of appointment is done key disperse to obtain process cipher key T emp_Key1 if MAC1 equals MAC; Temp_Key1 deciphers EN_Data with the process encryption key, obtains expressly accomplishing decrypting process.
All adopt the process key to guarantee the fail safe of system in authentication between the subscription client of virtual community system and the platform in the present embodiment, MAC verification, the encryption.Client and platform utilize the key decentralized algorithm, generate the factor according to key and guarantee that with random number each process key is different, guarantee the fail safe of master key.The process key disappears after client-side program breaks link automatically, does not allow to read the validity that other instructions can the influence process key.The decentralized algorithm of process key is:
SESKey：＝DIV(DK，Data)；
Wherein Data:=process key generates the factor || random number, and the process key generates the factor 6 bytes (this factor is used for the generation of participation process key, can be real-time time YYMMDDHHMMSS)
DIV (DK, Data) or DIV or DIV () be meant and carry out key decentralized algorithm (Diversify), be meant the master key MK of two length, separate data is handled, derive the key DK of two length.
The method of the DK left-half of wherein deriving is:
1) with the rightest 16 numerals of separate data as importing data;
2) with MK as encryption key;
3) make MK the input data are carried out the 3DES computing.
The method of DK right half part of wherein deriving is:
1) the rightest 16 numerals of separate data is negated, as the input data;
2) with MK as encryption key;
3) with MK the input data are carried out the 3DES computing.
Be illustrated in figure 5 as the MAC checking algorithm.The flow process of MAC checking algorithm is:
The packet that 1) will send in order forms data block:
2) this data block is divided into the data block that 8 bytes are unit, label is D1, D2, D3, D4 etc.Last data block might be a 1-8 byte.
3), then add to forward the 4th in 16 systems numeral ' 8000000000000000 ' thereafter if last data block length is 8 bytes) step.
If last data block length less than 8 bytes then add thereafter if reach 8 byte lengths, then to change the 4th in 16 systems numeral ' 80 ') step; Otherwise reach 8 bytes up to length adding 16 systems numeral ' 0 ' thereafter.
4) use the MAC key to encrypt to these data blocks.
5) finally obtaining is the MAC of 4 byte lengths obtained from result of calculation left side.
Authentication realizes the authentication on cell-phone customer terminal and virtual community backstage in the present embodiment, comprises descending authentication and up authentication.Descending authentication is the legal identity that platform is confirmed client, and up authentication is the legal identity that client is confirmed platform.Through the up-downgoing authentication, platform and client are confirmed the other side's legal identity respectively, guarantee the legitimacy of both sides' information interaction, and guarantee that client opened this business; MAC (message integrality) verification prevents losing of information in the reciprocal process of client and virtual community platform and repeats, also prevents arbitrarily distorting information simultaneously.Present embodiment is involved key use key all in authentication, MAC verification, encryption.Client and platform adopt the 3DES AES, with two length (16 byte) keys 8 byte block of plaintext data are encrypted to ciphertext block data, have good fail safe and realizability.
Above-mentioned instance only is explanation technical conceive of the present invention and characteristics, and its purpose is to let the people who is familiar with this technology can understand content of the present invention and enforcement according to this, can not limit protection scope of the present invention with this.All equivalent transformations that spirit is done according to the present invention or modification all should be encompassed within protection scope of the present invention.
Claims (7)
1. mutual authentication encryption method between user terminal and virtual community platform; Said user terminal and virtual community platform carry out the up-downgoing authentication between virtual community platform and user terminal earlier when inserting, said virtual community platform and user terminal are confirmed the other side's legal identity respectively and confirm to carry out alternately after user terminal has been opened the business of said virtual community platform; It is characterized in that said method comprise when between virtual community platform and user terminal during the up-downgoing authentication and/or virtual community platform and user terminal carry out the data after transmission side data when mutual obtains encryption to the data of transmission through the encryption of key decentralized algorithm, the data after the data of data receiver after to encryption obtain deciphering through key decentralized algorithm decryption processing; The up-downgoing authentication is relatively carried out authentication through the data after deciphering and the data of transmission between said virtual community platform and user terminal; Said virtual community platform and user terminal carry out obtaining the data of transmission through the data after the deciphering alternately.
2. method according to claim 1; Transmission side data submits to the requesting party of authentication to adopt the identity cipher-text information after the encryption of key decentralized algorithm obtains encrypting to transmit to user terminal identity information for submitting the requesting party of authentication to when it is characterized in that in the said method between virtual community platform and user terminal the up-downgoing authentication; The data receiver is the reciever that carries out authorization identifying, and the reciever that carries out authorization identifying carries out the identity data after decryption processing obtains deciphering through the key decentralized algorithm to the identity cipher-text information after encrypting; When the identity data after the deciphering was consistent with user terminal identity information, then authentication was passed through; Otherwise authentication is not passed through.
3. method according to claim 1 is characterized in that in the said method that virtual community platform and user terminal carry out when mutual transmission side data and adopt the encryption of key decentralized algorithm to obtain the data encrypted message to the data message to transmit; The data receiver carries out the data message after decryption processing obtains deciphering through the key decentralized algorithm to the data encrypted message after the data message is carried out the message completeness check.
4. according to claim 2 or 3 described methods, it is characterized in that virtual community platform and user terminal are provided with master key in the said method, between virtual community platform and user terminal through the communication of process key.
5. method according to claim 4 is characterized in that the process key produces through the key decentralized algorithm in the said method, and its formula is:
SESKey?=?DIV（DK，Data）；
Wherein SESKey is the process key; Data is the logic OR computing of the process key generation factor and random number, and the process key generates the certain number that the factor is interim generation; DIV () computing is meant and carries out the key decentralized algorithm in the formula, is meant the master key MK of two length, and separate data is handled, and derives the key DK of two length; Wherein the DK left-half be earlier with the rightest 8 bytes of separate data as the input data,, obtain as encryption key with MK through the input data being carried out the 3DES computing with MK; Wherein the DK right half part is earlier the rightest 8 bytes of separate data to be negated the back as the input data; , obtain as encryption key with MK through the input data being carried out the 3DES computing with MK.
6. method according to claim 5 is characterized in that the process key generation factor is that length is the numeral of 6 bytes in the said method.
7. method according to claim 3 is characterized in that the message completeness check of data message in the said method may further comprise the steps:
The data message packet that 1) will send in order is divided into several data blocks, and the length of each data block is 8 bytes
2) when the length of last data block is 8 bytes, in last data block opening 16 systems numeral ' 80 00 00 00 00 00 00 00 '; When curtailment 8 bytes of last data block, after last data block from the left side successively cover 16 systems numeral ' 80 00 00 00 00 00 00 00 ' reach 8 bytes until the length of last data block;
4) adopt XOR to carry out encryption according to the DEA encryption mode successively to data block and obtain result of calculation with use MAC key; The MAC of 4 byte lengths of obtaining from the result of calculation left side.
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Application publication date: 20120404 |