CN106408673A - Vehicle-mounted unit applied to path identification system and safe method of vehicle-mounted unit - Google Patents
Vehicle-mounted unit applied to path identification system and safe method of vehicle-mounted unit Download PDFInfo
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- CN106408673A CN106408673A CN201610731592.3A CN201610731592A CN106408673A CN 106408673 A CN106408673 A CN 106408673A CN 201610731592 A CN201610731592 A CN 201610731592A CN 106408673 A CN106408673 A CN 106408673A
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
- G07B15/00—Arrangements or apparatus for collecting fares, tolls or entrance fees at one or more control points
- G07B15/06—Arrangements for road pricing or congestion charging of vehicles or vehicle users, e.g. automatic toll systems
- G07B15/063—Arrangements for road pricing or congestion charging of vehicles or vehicle users, e.g. automatic toll systems using wireless information transmission between the vehicle and a fixed station
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- Computer Networks & Wireless Communication (AREA)
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Abstract
The invention discloses a vehicle-mounted unit applied to a path identification system and a safe method of the vehicle-mounted unit. The path identification system comprises the vehicle-mounted unit composed of an electronic label, a roadside unit composed of a roadside identification station and a desktop unit composed of a lane card reader and a service subsystem; the vehicle-mounted unit comprises an Msp430 microcontroller module, a PSAM safety certificate module, a GBM-DD103 positioning time service module, a CC1101 RF module, antennas and a FLASH storage module; and the GBM-DD103 positioning time service module and the PSAM safety certificate module configured in the vehicle-mounted unit provide positioning time-service and encryption functions respectively. A visitor can authorized via the encryption function, invalid access is prevented, and the legality and validity of a path identification can be determined via the positioning time-service function; and thus, the safety of the whole system is improved.
Description
Technical field
The present invention relates to the path identifying system in intelligent transportation field, particularly to a kind of application
Board units and safety method in path identifying system.
Background technology
With developing rapidly of China's economy, the construction of highway gradually tends to intelligent, and ETC electronic toll system is just
It is a Typical Representative of intelligent transportation application.Due to the complexity of China's freeway facility, some provinces are often adopted
Combined with private investment with nation-building, the operation way of income proportional assignment.With the continuous construction of highway, road
Net becomes to become increasingly complex, and from an entrance to one outlet, often there are much different paths, and these different paths
The investor that may belong to different has.The Fare Collection System of early stage cannot judge the path that vehicle passes through, and therefore interests cannot be
Fair clearing between each investor, and road network is more complicated, and problem is more serious.
For above-mentioned problem, the identified system in road comes into existence as the situation requires, and its main feature is exactly in existing Fare Collection System
On the basis of solve the problems, such as vehicle labelling through path, thus realizing the fair division of interests.Path identifying system master
To be made up of three parts：Board units（Electronic tag）, roadside unit（Road-side identification station）, table-top unit（Track card reader with
Service sub-system）Deng.The main working process of this system is：In expressway access, table-top unit writes mouth to board units
Information；On a highway, the road of board units reception roadside unit broadcast is identified（One represented in road network public at a high speed
Road, has uniqueness）And store；In expressway exit, ID of trace route path is read from board units and processes by table-top unit.
The communication of 433MHz frequency range is adopted between roadside unit and board units, table-top unit and board units.
In above-mentioned flow process, safety is a very important problem.If the ID of trace route path of board units storage is not true
Real, the interests of investor will be caused damage.Wherein, the unsafe factor related to board units includes：None- identified is non-
The legal but invalid path that illegal ID of trace route path that the table-top unit of method, None- identified receive, None- identified receive
Mark.
Content of the invention
Safety issue that the present invention is likely to occur for board units side it is proposed that a kind of with encryption and position
The novel on-vehicle unit of timing function.This board units passes through PSAM security authentication module, the GBM-DD103 time service positioning being equipped with
A series of secure interaction rules between miscellaneous equipment in module and and system, it is possible to achieve the authentication functions of visitor, road
The legitimacy of footpath mark and Effective judgement.The board units that the present invention is provided are applied to path identifying system, can improve
The safety of whole system.
The present invention is realized by such technical scheme：A kind of board units being applied to path identifying system, its
Middle path identifying system include the board units being made up of electronic tag, the roadside unit being made up of road-side identification station, by track
The table-top unit that card reader is constituted with service sub-system is it is characterised in that described board units include Msp430 microcontroller
Module, PSAM security authentication module, GBM-DD103 positioning time service module and antenna, CC1101 radio-frequency module and antenna and FLASH
Memory module；Wherein, GBM-DD103 positioning time service module is connected with Msp430 micro controller module by UART1 interface, and leads to
Cross antenna and receive satellite-signal；CC1101 radio-frequency module is connected with Msp430 micro controller module by UART2 interface, and passes through
Antenna is interacted with miscellaneous equipment in system；PSAM security authentication module passes through 7816 EBIs and Msp430 microcontroller
Module connects, responsible data encrypting and deciphering；FLASH memory module is connected with Msp430 micro controller module by SDIO interface, uses
In store path identification information.
A kind of safety method of board units being applied to path identifying system of the present invention it is characterised in that
Before path identifying system runs, in the PSAM security authentication module first board units, roadside unit, table-top unit being used
Key is initialized, and makes the key that three's encryption and decryption uses identical；Then respectively table-top unit is conducted interviews authentication, satisfy the need
Footpath mark legitimacy is judged and path is identified with effect property to judge, its step is as follows：
One. conduct interviews authentication to table-top unit
（1）. board units receive the access instruction that table-top unit sends；
（2）. board units use PSAM security authentication module to produce random parameter RAND, and using key, random parameter RAND are carried out
3DES encryption computing generates MAC, then the response message comprising random parameter RAND is passed back to table-top unit；
（3）. table-top unit reads the random parameter RAND in response, and carries out 3DES encryption using PSAM security authentication module to it
Computing, generates MAC1；
（4）. table-top unit sends other service orders to board units, carries previous action generation in these instructions
MAC1；
（5）. after board units receive service order information, the MAC1 field in information is taken out, produce with itself calculating before
Raw MAC is compared, if equal, respond this order, is otherwise not responding to；
Two. ID of trace route path legitimacy is judged
（1）. in expressway access, table-top unit writes access information to board units, and board units enter at a high speed with vehicle；
（2）. the ID of trace route path with timestamp after roadside unit broadcast enciphering, wherein ID of trace route path are designated as PA, time stamp
For T, with encryption key, 3DES encryption computing is carried out to PA+T, obtain result PAT；
（3）. board units receive the routing information PAT of roadside unit broadcast, position time service module by GBM-DD103 simultaneously
Timing function generate current time information T1, by these information Stores in FLASH；
（4）. in expressway exit, table-top unit reads the routing information PAT of storage in board units, obtains path after deciphering
Mark PA, time stamp T；Read temporal information T1 of board units itself simultaneously；
（5）. judge the legitimacy of ID of trace route path PA：Time stamp T and temporal information T1 are contrasted, if | T-T1 |<△ t, then
Think that ID of trace route path PA is legal, otherwise illegal；Wherein △ t is broadcast to the time delay of reception and board units by routing information
Processing delay estimation obtains；
Three. path is identified with effect property and judges
（1）. in expressway access, table-top unit writes access information to board units, and board units enter at a high speed with vehicle；
（2）. roadside unit broadcast route information PAT；
（3）. board units received path message PAT, itself generate the several continuous coordinate information in current driving path simultaneously
X1, X2 ..., by these information Stores in FLASH；
（4）. in expressway exit, table-top unit reads the routing information of storage in board units
PAT, and decipher and obtain ID of trace route path PA, read simultaneously coordinate information X1, X2 ...；
（5）. judge the effectiveness of ID of trace route path PA：By coordinate information X1, X2 ... intended
Close, obtain fitting routines X, the read-out path mark corresponding fitting routines of PA are Y from data base, by two fitting routines
X and Y is contrasted, if same path then it is assumed that this ID of trace route path PA effectively, otherwise for invalid.
The invention has the beneficial effects as follows：The present invention design board units be equipped with GBM-DD103 positioning time service module,
PSAM security authentication module, each provides time service positioning function and encryption function.Can be to visitor by encryption function
Being authenticated, prevented unauthorized access, being may determine that legitimacy and the effectiveness of ID of trace route path by positioning timing function, thus carrying
The high safety of whole system.
Brief description
Fig. 1 is said path identifying system schematic diagram of the present invention；
Fig. 2 is the graph of a relation of the present invention and miscellaneous equipment in system；
Fig. 3 is the board units hardware structure figure in said system of the present invention；
Fig. 4 is roadside unit hardware structure figure in said system of the present invention；
Fig. 5 is table-top unit hardware structure figure in said system of the present invention；
Fig. 6 is the access authentication flow chart of the present invention；
Fig. 7 is the ID of trace route path validity judgement flow chart of the present invention；
Fig. 8 is the ID of trace route path Effective judgement flow chart of the present invention.
Specific embodiment
Below in conjunction with accompanying drawing, the invention will be further described：
The internal main composition of board units proposed by the present invention and connected mode are as shown in figure 3, path identifying system is included by electricity
Board units that subtab is constituted, the roadside unit being made up of road-side identification station, it is made up of track card reader and service sub-system
Table-top unit, board units include Msp430 micro controller module, PSAM security authentication module, GBM-DD103 positioning time service
Module and antenna（GPSL1 frequency, this frequency is civilian frequency）, CC1101 radio-frequency module and antenna and FLASH memory module；Its
In, GBM-DD103 positioning time service module is connected with Msp430 micro controller module by UART1 interface, and is received by antenna
Satellite-signal；CC1101 radio-frequency module is connected with Msp430 micro controller module by UART2 interface, and passes through antenna and system
Middle miscellaneous equipment interacts；PSAM security authentication module is connected with Msp430 micro controller module by 7816 EBIs,
Responsible data encrypting and deciphering；FLASH memory module is connected with Msp430 micro controller module, for store path by SDIO interface
Identification information.Board units are not equipped with any wireline interface.
Referring to figs. 1 to Fig. 8, the main operational principle of the present invention is：In expressway access, board units receive desktop list
The access instruction of unit, realizes authorizing procedure by PSAM security authentication module.After the legitimate verification of table-top unit passes through, to car
Carrier unit writes access information.Board units enter highway with vehicle, receive the road with timestamp of roadside unit broadcast
Footpath identification information.Meanwhile, board units by GBM-DD103 position time service module obtain current time information, institute through passing by one's way
The coordinate information in footpath.By these information Stores in FLASH.In expressway exit, board units receive the visit of table-top unit
Ask instruction, authorizing procedure is realized by PSAM security authentication module.The legitimacy of table-top unit, after checking, reads vehicle-mounted list
The routing information of storage, time and coordinate information in unit, and the legitimacy of execution route mark and Effective judgement.
Board units proposed by the present invention are equipped with PSAM security authentication module, GBM-DD103 positioning time service module etc., lead to
Cross the secure interaction rules between miscellaneous equipment in a series of and system, improve the safety of system.Recognized safely by PSAM
Card module, all achieves the access authentication to table-top unit in expressway access and outlet.Time service is positioned by GBM-DD103
The timing function of module, generates temporal information during RX path identification information, ID of trace route path legitimacy can be entered in outlet
Row judges.By GBM-DD103 position time service module positioning function, generate RX path identification information when through path
Coordinate information, can be judged to the effectiveness of ID of trace route path with matching vehicle running path in outlet.
Before path identifying system runs, the PSAM first board units, roadside unit, table-top unit being used recognizes safely
Key in card module is initialized, and makes the key that three's encryption and decryption uses identical；Then respectively table-top unit is visited
Ask authentication（It is complete term）, ID of trace route path legitimacy is judged and path is identified with effect property judge,
Its step is as follows：
One. conduct interviews authentication to table-top unit（As shown in Figure 6）
（1）. board units receive the access instruction that table-top unit sends；
（2）. board units use PSAM security authentication module to produce random parameter RAND, and using key, random parameter RAND are carried out
3DES encryption computing generates MAC (Message Authentication Code, Message Authentication Code), then will comprise random number
The response message of RAND is passed back to table-top unit；
（3）. table-top unit reads the random parameter RAND in response, and carries out 3DES using PSAM security authentication module to it
（Triple Data Encryption Standard, data encryption standardss）Cryptographic calculation, generates MAC1；
（4）. table-top unit sends other service orders to board units, carries previous action generation in these instructions
MAC1；
（5）. after board units receive service order information, the MAC1 field in information is taken out, produce with itself calculating before
Raw MAC is compared, if equal, respond this order, is otherwise not responding to.
By above-mentioned flow process, can prevent board units from being accessed by illegal table-top unit, lead to the road in board units
The information such as footpath mark are tampered or destroy.
Two. ID of trace route path legitimacy is judged（As shown in Figure 7）
（1）. in expressway access, table-top unit writes access information to board units, and board units enter at a high speed with vehicle；
（2）. the ID of trace route path with timestamp after roadside unit broadcast enciphering, wherein ID of trace route path are designated as PA, time stamp
For T, with encryption key, 3DES encryption computing is carried out to PA+T, obtain result PAT；
（3）. board units receive the routing information PAT of roadside unit broadcast, position time service module by GBM-DD103 simultaneously
Timing function generate current time information T1, by these information Stores in FLASH；
（4）. in expressway exit, table-top unit reads the routing information PAT of storage in board units, obtains path after deciphering
Mark PA, time stamp T；Read temporal information T1 of board units itself simultaneously；
（5）. judge the legitimacy of ID of trace route path PA：Time stamp T and temporal information T1 are contrasted, if | T-T1 |<△ t, then
Think that ID of trace route path PA is legal, otherwise illegal；Wherein △ t is broadcast to the time delay of reception and board units by routing information
Processing delay estimation obtains.
Because the broadcast of routing information uses one-way communication, may be supervised therefore during radio wave transmissions
Listen, attacker, after the routing information intercepting and capturing roadside unit broadcast, can launch identical routing information on other paths, real
Apply Replay Attack, thus leading to the routing information that board units receive untrue.By above-mentioned flow process, board units are receiving road
Generate current temporal information while the identification information of footpath, and the legitimacy carrying out temporal information to routing information in outlet is tested
Card, can greatly increase the difficulty of Replay Attack, thus being effectively improved the reliability of routing information.
Three. path is identified with effect property and judges（As shown in Figure 8）
（1）. in expressway access, table-top unit writes access information to board units, and board units enter at a high speed with vehicle；
（2）. roadside unit broadcast route information PAT；
（3）. board units received path message PAT, itself generate the several continuous coordinate information in current driving path simultaneously
X1, X2 ..., by these information Stores in FLASH；
（4）. in expressway exit, table-top unit reads the routing information of storage in board units
PAT, and decipher and obtain ID of trace route path PA, read simultaneously coordinate information X1, X2 ...；
（5）. judge the effectiveness of ID of trace route path PA：By coordinate information X1, X2 ... intended
Close, obtain fitting routines X, the read-out path mark corresponding fitting routines of PA are Y from data base, by two fitting routines
X and Y is contrasted, if same path then it is assumed that this ID of trace route path PA effectively, otherwise for invalid.
If vehicle drives to certain region, covered by the broadcast singal of more than one legal roadside unit simultaneously, then can
Cause monkey chatter.This situation belongs to non-malicious interference, is primarily due to two paths and intersects or close together, roadside unit
Addressing is not good enough to be caused.The corresponding fitting routines of ID of trace route path of interference are differed greatly with true path, can by above-mentioned flow process
Easily to be excluded.
Claims (2)
1. a kind of board units being applied to path identifying system, wherein path identifying system include the car being made up of electronic tag
Carrier unit, the roadside unit being made up of road-side identification station, the table-top unit being made up of track card reader and service sub-system, it is special
Levy and be, described board units include Msp430 micro controller module, PSAM security authentication module, GBM-DD103 positioning award
When module and antenna, CC1101 radio-frequency module and antenna and FLASH memory module；Wherein, GBM-DD103 positioning time service module is led to
Cross UART1 interface to be connected with Msp430 micro controller module, and satellite-signal is received by antenna；CC1101 radio-frequency module passes through
UART2 interface is connected with Msp430 micro controller module, and is interacted with miscellaneous equipment in system by antenna；PSAM safety
Authentication module is connected with Msp430 micro controller module by 7816 EBIs, responsible data encrypting and deciphering；FLASH memory module
It is connected with Msp430 micro controller module by SDIO interface, for store path identification information.
2. a kind of safety method using the board units being applied to path identifying system as claimed in claim 1, its feature
Be, path identifying system run before, first to board units, roadside unit, table-top unit use PSAM safety certification
Key in module is initialized, and makes the key that three's encryption and decryption uses identical；Then respectively table-top unit is conducted interviews
Authenticate, ID of trace route path legitimacy is judged and path is identified with effect property and judge, its step is as follows：
One. conduct interviews authentication to table-top unit
（1）. board units receive the access instruction that table-top unit sends；
（2）. board units use PSAM security authentication module to produce random parameter RAND, and using key, random parameter RAND are carried out
3DES encryption computing generates MAC, then the response message comprising random parameter RAND is passed back to table-top unit；
（3）. table-top unit reads the random parameter RAND in response, and carries out 3DES encryption using PSAM security authentication module to it
Computing, generates MAC1；
（4）. table-top unit sends other service orders to board units, carries previous action generation in these instructions
MAC1；
（5）. after board units receive service order information, the MAC1 field in information is taken out, produce with itself calculating before
Raw MAC is compared, if equal, respond this order, is otherwise not responding to；
Two. ID of trace route path legitimacy is judged
（1）. in expressway access, table-top unit writes access information to board units, and board units enter at a high speed with vehicle；
（2）. the ID of trace route path with timestamp after roadside unit broadcast enciphering, wherein ID of trace route path are designated as PA, time stamp
For T, with encryption key, 3DES encryption computing is carried out to PA+T, obtain result PAT；
（3）. board units receive the routing information PAT of roadside unit broadcast, position time service module by GBM-DD103 simultaneously
Timing function generate current time information T1, by these information Stores in FLASH；
（4）. in expressway exit, table-top unit reads the routing information PAT of storage in board units, obtains path after deciphering
Mark PA, time stamp T；Read temporal information T1 of board units itself simultaneously；
（5）. judge the legitimacy of ID of trace route path PA：Time stamp T and temporal information T1 are contrasted, if | T-T1 |<△ t, then
Think that ID of trace route path PA is legal, otherwise illegal；Wherein △ t is broadcast to the time delay of reception and board units by routing information
Processing delay estimation obtains；
Three. path is identified with effect property and judges
（1）. in expressway access, table-top unit writes access information to board units, and board units enter at a high speed with vehicle；
（2）. roadside unit broadcast route information PAT；
（3）. board units received path message PAT, itself generate the several continuous coordinate information in current driving path simultaneously
X1, X2 ..., by these information Stores in FLASH；
（4）. in expressway exit, table-top unit reads the routing information of storage in board units
PAT, and decipher and obtain ID of trace route path PA, read simultaneously coordinate information X1, X2 ...；
（5）. judge the effectiveness of ID of trace route path PA：By coordinate information X1, X2 ... intended
Close, obtain fitting routines X, the read-out path mark corresponding fitting routines of PA are Y from data base, by two fitting routines
X and Y is contrasted, if same path then it is assumed that this ID of trace route path PA effectively, otherwise for invalid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610731592.3A CN106408673A (en) | 2016-08-26 | 2016-08-26 | Vehicle-mounted unit applied to path identification system and safe method of vehicle-mounted unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610731592.3A CN106408673A (en) | 2016-08-26 | 2016-08-26 | Vehicle-mounted unit applied to path identification system and safe method of vehicle-mounted unit |
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| Publication Number | Publication Date |
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| CN106408673A true CN106408673A (en) | 2017-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610731592.3A Pending CN106408673A (en) | 2016-08-26 | 2016-08-26 | Vehicle-mounted unit applied to path identification system and safe method of vehicle-mounted unit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111047724A (en) * | 2019-11-11 | 2020-04-21 | 深圳市金溢科技股份有限公司 | Readable storage medium, path identification system, vehicle-mounted unit and transaction method |
| CN111899368A (en) * | 2020-08-28 | 2020-11-06 | 华宇智联(广州)信息科技有限公司 | ETC fee deduction system fee deduction method based on remote deployment of PSAM card, ETC fee deduction control device and system |
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