CN201413530Y - Information encryption device for multi-path identification station - Google Patents

Abstract

The utility model discloses an information encryption device for a multi-path identification station, which comprises an encryption module connected with a controller, wherein, the encryption module provides controller with internal numbers, obtains an internal clock from the controller and forms a mark message; the output end of the controller is connected with a radio-frequency module, and the controller receives an internal code from the encryption module and simultaneously provides the internal clock of the controller to the encryption module; and an input end of the radio-frequency moduleis connected with the controller, and the radio-frequency module sends out the received mark message. The information encryption device for the multi-path identification station increases the encryption module in the original identification station system, thereby having high safety and reliability. The information encryption device of the multi-path identification station can carry out encryption on vehicle data, prevent malignant juggling of other people and further ensure the normal operation of an electronic non-stopping toll system. For safe use, a road entrance also adopts the same technology for carrying out encryption treatment on the vehicle data of the entrance, thereby ensuring the safety of service data of the whole system.

Description

Multipath beacon station information encryption device

Technical field

The utility model relates to a kind of encryption device, specifically relates to a kind of beacon station information encryption device that is applied in the electronic charging system without parking.

Background technology

At present, non-parking charge is in China's rapid development at the startup the ITS field, and when every information interaction technology was maked rapid progress, information safe and reliable become the focus that people pay close attention to.But electronic charging system without parking does not still solve this safety problem--the secure communication problem between beacon station and the tag card.In the existing electronic charging system without parking, what adopt between beacon station and the tag card is radio communication, and the computing power of tag card itself is very limited, can't carry out the encryption and decryption computing that needs a large amount of computational resources, therefore it has been generally acknowledged that this channel is unsafe.In general, communicating by letter and will satisfy between beacon station and the tag card:

Confidentiality: the information of intercommunication is not read by unwarranted third party;

Authentication property: before the formal communication of beginning, both sides confirm the other side's identity;

Not traceable property: the assailant can't follow the tracks of its carrier according to tag identifier.

Summary of the invention

The purpose of this utility model provides a kind of multipath beacon station information encryption device that can obtain vehicle data safely and reliably.

For achieving the above object, the utility model is by the following technical solutions: the utility model comprises:

Encrypting module, it is connected with controller, and encrypting module provides internal number for controller, and obtains internal clocking in the slave controller, forms the sign message;

Controller, it is connected with encrypting module, and its output terminal is connected with radio-frequency module, and above-mentioned controller receives the in-line coding that comes from encrypting module, provides the controller internal clocking to encrypting module simultaneously;

Radio-frequency module, its input end is connected with controller, and the sign message that described radio-frequency module will receive sends.

Above-mentioned encrypting module is the SAM card module.

Adopt the utility model of technique scheme, set up encrypting module in original beacon station system, its cryptographic algorithm is Single DES, the Triple DES algorithm of People's Bank of China's approval, has the safe reliability of height.Therefore, the utility model can be maintained secrecy to vehicle data, prevents that other people from distorting mala fide, thereby has guaranteed the normal operation of electronic charging system without parking.Be safer use, the highway inlet also adopts same technology that the vehicle entry data is carried out encryption.In the highway outlet, read inlet and beacon station data from tag card, and carry out the computations checking, thereby guaranteed the security of total system service data.

Description of drawings

Fig. 1 is the circuit theory diagrams of the utility model middle controller and SAM module;

Fig. 2 is the circuit theory diagrams of radio-frequency module in the utility model.

Embodiment

As shown in Figure 1 and Figure 2, the utility model is made up of encrypting module, controller and radio-frequency module.Wherein, the output terminal of encrypting module connects controller, and the output terminal of controller connects radio frequency chip.Need to prove, above-mentioned encrypting module adopts Single DES, the Triple DES algorithm of People's Bank of China's approval, for meeting the SAM card module of " China's finance integrated circuit (IC) calliper model ", safe computation key adopts multistage dispersal mechanism in the SAM card module, and a card one is close.Above-mentioned SAM card module is a technology well known to those of ordinary skill in the art.In addition, encrypting module also can adopt other cryptographic algorithm, as HMAC module or the like, wherein, the HMAC module is the Hash computing circuit that is used for the band key of message authentication, and it mainly is made of Hash computing module and exclusive-OR operator, is similarly technology well known to those of ordinary skill in the art.

Principle of work of the present utility model is:

Encrypting module U3 provides internal number for controller U1, controller U1 gets encrypting module U3 internal number, controller U1 gets the current time formation sign message of internal clocking simultaneously, and be delivered to encrypting module U3 and encrypt the 3DES computing, form the sign message of encrypting, the sign message of Jia Miing passes to radio-frequency module U2 then, send to tag card by radio circuit then and receive, and whether the verification ciphertext is correct when outlet.

Like this, every through a car, information such as beacon station coding, current time, the numbering that is open to traffic are carried out computations, form anti-tamper information, form the beacon station message together with identification data and send to tag card.The highway inlet also adopts same technology that the vehicle entry data is carried out encryption.In the highway outlet, read inlet and beacon station data from tag card, and carry out the computations checking, thereby guaranteed the security of total system service data.

Claims (2)

1, a kind of multipath beacon station information encryption device is characterized in that it comprises:

Encrypting module, it is connected with controller, and described encrypting module provides internal number for controller, and obtains internal clocking in the slave controller, forms the sign message;

Controller, it is connected with encrypting module, and its output terminal is connected with radio-frequency module, and described controller receives the in-line coding that comes from encrypting module, provides the controller internal clocking to encrypting module simultaneously;

Radio-frequency module, its input end is connected with controller, and the sign message that described radio-frequency module will receive sends.

2, multipath beacon station information encryption device according to claim 1, it is characterized in that: described encrypting module is the SAM card module.

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