CN108848089A - A kind of data ciphering method and data transmission system - Google Patents
A kind of data ciphering method and data transmission system Download PDFInfo
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- CN108848089A CN108848089A CN201810608650.2A CN201810608650A CN108848089A CN 108848089 A CN108848089 A CN 108848089A CN 201810608650 A CN201810608650 A CN 201810608650A CN 108848089 A CN108848089 A CN 108848089A
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- data
- dynamic password
- key
- encryption
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- 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
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
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- 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
- H04L63/067—Network architectures or network communication protocols for network security for supporting key management in a packet data network using one-time keys
-
- 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
- H04L63/12—Applying verification of the received information
- H04L63/123—Applying verification of the received information received data contents, e.g. message integrity
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- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Computer Hardware Design (AREA)
- Computing Systems (AREA)
- General Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Storage Device Security (AREA)
Abstract
This application discloses a kind of data ciphering method and data transmission system, data ciphering method includes：First dynamic password is generated by transaction data；First key is calculated in first dynamic password and the enumeration data currently traded；Sensitive data is encrypted using first key, forms the first encryption data；Mac is calculated to sensitive data using device keys, forms the first Mac data；Calculate using the former data that device keys collectively constitute the data not encrypted in transaction data, the first encryption data and the first Mac data and generate the second abstract, and the second abstract is attached to behind former data and is transferred to server together.Invention achieves data by different cryptographic key protections, prevents transmission data to be tampered, effective guarantee data transmission security, efficient technical effect.
Description
Technical field
The present invention relates to field of information security technology more particularly to a kind of data ciphering method and data transmission systems.
Background technique
With the improvement of living standards, bank card is largely issued, various bank card accepting terminals, including POS end are produced
End, ATM terminal, phone-payment terminal etc. and corresponding payment system.For various accepting terminals of standardizing, Chinese people
Bank has issued financial industry relevant criterion.The standard specifies the soft and hardware safety requirements of various accepting terminals, including information
The requirement of protection, system security protection, key management, access control, terminal tamper-resistant etc..
Currently, domestic financial institution's accepting terminal generally use be master key/transaction key (MK/SK) grading key
System.The loading of master key is to be carried out in security context using the physical route of safety.The publication and update of transaction key are then
It is remotely to be carried out under the encryption of master key by on-line communication.But transaction key needs often regularly update, and are otherwise easy
Whole ciphertext and plaintext are generated, and forms dictionary attack, this method was both troublesome or dangerous.
Summary of the invention
The purpose of the present invention is to provide a kind of data ciphering method and data transmission systems, to reach data by different close
Key be protected from send data be tampered, effective guarantee data transmission security, efficient technical effect.
In order to achieve the above objectives, the present invention adopts the following technical scheme that：
A kind of data ciphering method, including the first dynamic password is generated by transaction data；First dynamic password and current friendship
First key is calculated in easy enumeration data；Sensitive data is encrypted using first key, forms the first encryption data；
The data not encrypted in transaction data, the first encryption data and the first Mac data are collectively constituted using device keys
Former data, which calculate, generates the second abstract, and the second abstract is attached to behind former data and is transferred to server together.
Preferably, the method for the first dynamic password of generation is specially：It is to be protected quick according to being needed in the transaction data of selection
Feel data and generates the first dynamic password.
Preferably, the data type of sensitive data includes at least PIN, magnetic track and MAC data.
Preferably, the method for obtaining first key is specially：Use the first dynamic password and the enumeration data currently traded
One or more of be combined, and calculate combination after data first abstract, obtain digest value, obtain first by digest value
Key.
Preferably, the data type in enumeration data includes at least order number, serial number and batch number.
Preferably, the first dynamic password is the password of different types of data in the same time or same data type in difference
The password of time.
Preferably, the data not encrypted in transaction data include at least device number.
The present invention also provides a kind of data transmission systems, including accepting terminal and server；Accepting terminal utilizes above-mentioned
Data ciphering method transaction data is encrypted, and transfer data to server；Server receives accepting terminal transmission
Data, and encryption data is decrypted and is verified.
Preferably, the method that server is decrypted encryption data and verifies is specially：Receive accepting terminal transmission
Former data and the second abstract；Verify the correctness of former data；Decrypt the first encryption data；The correctness of data after verifying decryption.
Preferably, the method for the first encryption data of decryption is specially：Second is obtained according to the device number in clear data
Dynamic password obtains identical when the method and accepting terminal the first dynamic password of acquisition of the second dynamic password；Second dynamic password
The second key is calculated after combining with enumeration data identical when calculating first key with accepting terminal；It is decrypted using the second key
First encryption data.
The beneficial effects of the invention are as follows：Reach data by different cryptographic key protections, prevent send data be tampered, effective guarantee
Data transmission security, efficient technical effect.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in application can also be obtained according to these attached drawings other for those of ordinary skill in the art
Attached drawing.
Fig. 1 is the flow chart of data transmission method；
Fig. 2 is the flow chart for the method that accepting terminal encrypts transaction data；
Fig. 3 is the flow chart for the method that server is decrypted encryption data and verifies；
Fig. 4 is the flow chart for decrypting the method for the first encryption data.
Specific embodiment
With reference to the attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on the present invention
In embodiment, those skilled in the art's every other embodiment obtained without making creative work, all
Belong to the scope of protection of the invention.
The present invention provides a kind of data transmission systems, including accepting terminal and server, and accepting terminal is to transaction data
It is encrypted, and transfers data to server；Server receives the data of accepting terminal transmission, and solves to encryption data
Close and verifying.
According to Fig. 1, carry out data transmission including the following steps using above system：
S110：Fixed device keys and dynamic password key are imported into accepting terminal.
Specifically, fixed device keys and dynamic password are imported with encryption equipment in security context before accepting terminal factory
Key can not be then exported again after the device keys and dynamic password key importing accepting terminal.The device keys are for testing
The integrality and accuracy of card transmission data, dynamic password key are used to generate dynamic mouth according to data type or time factor
It enables.
S120：Accepting terminal encrypts transaction data.
Specifically, as shown in Fig. 2, the method that the accepting terminal encrypts transaction data is：
S210：The data type for needing sensitive data to be protected in transaction data is chosen, the first dynamic password is generated；
Further, the data type of sensitive data includes the data such as PIN, magnetic track and MAC data, but be not limited only to PIN,
The data such as magnetic track and MAC data.
Further, the first dynamic password is the password of different types of data in the same time or same data type not
With the password of time.
As one embodiment, selecting the first dynamic password is the password of different types of data in the same time, specifically,
Such as under same time factor, it is dynamic to generate PIN using dynamic password key by PIN and magnetic track in selection protection sensitive data
State password and magnetic track dynamic password, using PIN dynamic password and magnetic track dynamic password as the first dynamic password, for following
One key.
As another embodiment, select same data type in the password of different time, specifically, such as selection protection
MAC data in sensitive data generates the first MAC data dynamic password in first time point using dynamic password key, the
Two time points generated the second MAC data dynamic password, generate third MAC data dynamic password etc. at third time point, by first
MAC data dynamic password, the second MAC data dynamic password and third MAC data dynamic password are used for as the first dynamic password
Following first keys.
As another embodiment, select different types of data in the password of different time, specifically, when PIN is with first
Between point (such as first second) dynamic password；The MAC dynamic password at the second time point (such as the previous year sometime)；Magnetic track is with
The dynamic password at three time points (such as latter year is sometime), using the dynamic password at these three time points as the first dynamic mouth
It enables, for following first keys.
Further, using same data type in password in different time of different time and different types of data,
Accepting terminal needs the more new equipment time.
Specifically, the abstract that the device keys that server by utilizing is obtained from the device number in clear data calculate encrypts clothes
The current time factor T1 of business device obtains encryption data T2, and the MAC value Tm of time factor T1 is calculated with device keys, will
MAC value Tm is transferred to accepting terminal after being attached to encryption data T2 together.After accepting terminal receives encryption data T2 and MAC value Tm,
Encryption data T2 is decrypted using device keys to obtain time factor T3, MAC value is carried out to time factor T3 and is calculated
Ts.Whether consistent compare Tm and Ts, if unanimously, transmitting that data are accurate, and accepting terminal is according to time factor T3 to time factor
It is updated.
Further, using same data type in password in different time of different time and different types of data,
Accepting terminal does not need the more new equipment time.
Specifically, server needs if accepting terminal does not receive the time factor T1 for update of server transmission
The error information for recording the time factor T4 and time factor T1 of this accepting terminal, for use next time when equipment, service
Device can use the time factor T5 after being checked according to error information to work automatically, reduce and verify ciphertext data according to time factor
Number of attempt when accuracy.
S220：First dynamic password is combined with one or more of the enumeration data currently traded, and calculating group
The first abstract of data, obtains digest value, obtains first key by the digest value after conjunction；
Further, the data type of enumeration data includes the data such as order number, serial number and batch number, but is not limited only to
The data such as order number, serial number and batch number.
Specifically, digest value is calculated after can combining with order number in the first dynamic password, can also with order number and
Digest value is calculated after batch number combination.Digest value can be calculated by well known digest calculations mode.
S230：Sensitive data is encrypted using first key, forms the first encryption data；
Further, the sensitive data encrypted by digest value can be only to need sensitive data to be protected, can also
Think all sensitive datas, preferably only needs sensitive data to be protected in the present embodiment.
S240：Mac is calculated to sensitive data using device keys, forms the first Mac data.
S250；Using device keys to the data not encrypted in transaction data, the first encryption data and the first Mac number
Calculate according to the former data collectively constituted and generate the second abstract, and the second abstract is attached to behind former data and is transferred to clothes together
Business device.
Further, the data not encrypted in transaction data include at least device number.
Specifically, when encrypted sensitive data is data A1, former data include unencryption as one embodiment
The Mac data A3 of encryption data A2 and data A1 after data, data A1 are encrypted.When encrypted sensitive data is multiple
When, such as when encrypted sensitive data is data A, data B, data C；Former data include the data of unencryption, data A1 quilt
The Mac of encryption data B2 and data B1 after Mac data A3, the data B1 of encrypted encryption data A2 and data A1 is encrypted
The Mac data C3 of encryption data C2 and data C1 after data B3, data C1 are encrypted.
S130：Server is decrypted and verifies to encryption data.
Specifically, as shown in figure 3, the method that the server is decrypted encryption data and verifies is specially：
S310；Receive the former data and the second abstract of accepting terminal transmission.
S320：Verify the correctness of the former data after transmitting.
Specifically, server obtains equipment identical with the accepting terminal equipment according to the device number in the data of unencryption
Key calculates Mac to the former data received using the device keys, obtains third abstract, and comparison third abstract is plucked with second
It wants, when third abstract is identical as the second abstract, judges that the former data after transmitting are complete and correct.
S330：Decrypt the first encryption data.
Further, the method for the first encryption data of decryption is specially：
S410：The second dynamic password is obtained according to the device number in clear data, the method for obtaining the second dynamic password
It is identical when with accepting terminal the first dynamic password of acquisition.
S420：Second dynamic password and identical enumeration data calculates after combining when calculating first key with accepting terminal
Second key.
S430：The first encryption data is decrypted using the second key.
S340：Verify the correctness of data after the first encryption data is decrypted.
Specifically, using data and the worth 2nd Mac data of device keys calculating Mac after the decryption of the first encryption data,
2nd Mac data are compared with the first Mac data, when the 2nd Mac data are consistent with the first Mac data, judge to decrypt
Data afterwards are complete and correct.
Further, based on the dynamic password of time factor, when the 2nd Mac data and the first Mac data are inconsistent, also
The data obtained after the corresponding decryption of corresponding dynamic password key of more adjacent several time points are needed, data are effectively reduced
Error.
The beneficial effects of the invention are as follows：Reach data by different cryptographic key protections, prevent send data be tampered, effective guarantee
Data transmission security, efficient technical effect.
Although the preferred embodiment of the application has been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the application range.Obviously, those skilled in the art can be to the application
Various modification and variations are carried out without departing from spirit and scope.If in this way, these modifications and variations of the application
Belong within the scope of the claim of this application and its equivalent technologies, then the application is also intended to encompass these modification and variations and exists
It is interior.
Claims (10)
1. a kind of data ciphering method, which is characterized in that including：
First dynamic password is generated by transaction data；
First key is calculated in first dynamic password and the enumeration data currently traded；
Sensitive data is encrypted using the first key, forms the first encryption data；
Mac is calculated to sensitive data using device keys, forms the first Mac data；
Using device keys to the data not encrypted in transaction data, the first encryption data and common group of the first Mac data
At former data carry out calculate generate second abstract, and by it is described second abstract be attached to behind former data the service that is transferred to together
Device.
2. data ciphering method according to claim 1, which is characterized in that the method for generating the first dynamic password is specific
For：According to needing sensitive data to be protected to generate the first dynamic password in the transaction data of selection.
3. data ciphering method according to claim 2, which is characterized in that the data type of the sensitive data is at least wrapped
Include PIN, magnetic track and MAC data.
4. data ciphering method according to claim 3, which is characterized in that the method for obtaining first key is specially：Make
It is combined with first dynamic password with one or more of the enumeration data currently traded, and calculates data after combination
First abstract, obtain digest value, first key obtained by the digest value.
5. data ciphering method according to claim 4, which is characterized in that the data type in the enumeration data is at least
Including order number, serial number and batch number.
6. data ciphering method according to claim 5, which is characterized in that first dynamic password is in the same time
The password of the password of different types of data or same data type in different time.
7. data ciphering method according to claim 1, which is characterized in that the number not encrypted in the transaction data
According to including at least device number.
8. a kind of data transmission system, which is characterized in that including accepting terminal and server；
The accepting terminal encrypts transaction data using data ciphering method described in claim 1-7, and by data
It is transferred to server；
The server receives the data of the accepting terminal transmission, and encryption data is decrypted and is verified.
9. data transmission system according to claim 8, which is characterized in that encryption data is decrypted in the server
Method with verifying is specially：
Receive the former data and the second abstract of accepting terminal transmission；
Verify the correctness of the former data；
Decrypt first encryption data；
The correctness of data after verifying decryption.
10. data transmission system according to claim 9, which is characterized in that the method for the first encryption data of decryption is specific
For：
According in clear data device number obtain the second dynamic password, it is described obtain the second dynamic password method with accept
Terminal obtains identical when the first dynamic password；
Second dynamic password and identical enumeration data calculates second after combining when calculating first key with accepting terminal
Key；
First encryption data is decrypted using second key.
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| CN201810608650.2A CN108848089B (en) | 2018-06-13 | 2018-06-13 | Data encryption method and data transmission system |
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| CN201810608650.2A CN108848089B (en) | 2018-06-13 | 2018-06-13 | Data encryption method and data transmission system |
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Cited By (1)
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| CN114650151A (en) * | 2020-12-15 | 2022-06-21 | 宝能汽车集团有限公司 | Data transmission method, device and system based on vehicle CAN bus and storage medium |
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Address after: 801, 8 / F, building 4a, international R & D headquarters park, No. 68, Aoti street, Jianye District, Nanjing, Jiangsu Province, 210019 Patentee after: JIANGSU HENGBAO INTELLIGENT SYSTEM TECHNOLOGY Co.,Ltd. Address before: 212355 Hengtang Industrial Park, Yunyang Town, Danyang City, Zhenjiang City, Jiangsu Province Patentee before: JIANGSU HENGBAO INTELLIGENT SYSTEM TECHNOLOGY Co.,Ltd. |