CN104794436A - Data theft preventing device and method - Google Patents
Data theft preventing device and method Download PDFInfo
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- CN104794436A CN104794436A CN201510159222.2A CN201510159222A CN104794436A CN 104794436 A CN104794436 A CN 104794436A CN 201510159222 A CN201510159222 A CN 201510159222A CN 104794436 A CN104794436 A CN 104794436A
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F18/00—Pattern recognition
Abstract
The invention discloses a data theft preventing device and method. The method includes: acquiring a first signal transmitted by a reader; determining the attribute of the first signal; transmitting an interference signal corresponding to the attribute of the first signal and/or an interference signal corresponding to the attribute of a second signal according to the attribute of the first signal to allow the interference signals to overlap with the first signal and/or the second signal so as to interfere reader's reading of data in a radio frequency card. By the arrangement, the method has the advantages that the communication between the reader and the radio frequency card is interfered, the reader cannot read the data in the radio frequency card, the safety of the data information in the radio frequency card is protected, and the possibility of data information theft of the radio frequency card is prevented.
Description
Technical field
The present invention relates to Internet information safety technology field, be specifically related to a kind of data Anti-theft device and method.
Background technology
Radio-frequency (RF) identification (Radio Frequency Identification, be called for short RFID) be a kind of wireless communication technology, related data can be read and write by radio signals identification specific objective, and without the need to setting up machinery or optical contact between recognition system and specific objective.Its application is very extensive, and such as: library, gate control system, food security is traced to the source.The advantage of this technology is that user easily by the relevant information of contactless some radio-frequency cards of reading of reader, can read the safety that simultaneously also can reduce radio-frequency card information easily.Such as some lawless persons obtain some private radio-frequency card information when permitting without me, then some the private radio-frequency card information obtained are copied, by copying the information theft such as I.D., bank card property, cause huge economic loss to user.
A kind of radio-frequency card of current existence, which provide a kind of mechanism optionally making reader read information, such as, during the uncommitted reading of certain radio-frequency card, reader is the information that cannot read unwarranted radio-frequency card, but, of a great variety due to radio-frequency card, such as: passport, Payment Card (credit card, bank card etc.), automobile key card etc., each radio-frequency card all has this function, and its cost is very high, and all radio-frequency cards all have this mechanism be also be difficult to realize.
Summary of the invention
For defect of the prior art, the invention provides a kind of data Anti-theft device and method, by sending interfere information, the communication between interference reading device and radio-frequency card, effectively preventing the data in reader reading radio-frequency card.
First aspect, the invention provides a kind of data Anti-theft device, comprising:
Supplementary module, for obtaining the first signal that reader sends, determines the attribute of described first signal according to described first signal;
Interference module, for the attribute of described first signal determined according to described supplementary module, send the undesired signal of answering with the Attribute Relative of described first signal and/or the undesired signal of answering with the Attribute Relative of secondary signal, to make described undesired signal and described first signal and/or secondary signal superimposed, to disturb the data in described reader reading radio-frequency card;
Wherein, described secondary signal is the radio-frequency card data-signal that radio-frequency card sends in response to described first signal.
Optionally, the attribute of described first signal and the attribute of described secondary signal comprise high frequency nature and low frequency attribute;
Accordingly, described supplementary module, specifically for:
Detect the first signal of reader transmission and/or the secondary signal of radio-frequency card transmission;
Described first signal and/or described secondary signal are compared with the carrier frequency signaling of default frequency range respectively, determines the frequency range of described first signal and/or described secondary signal, obtain the attribute of described first signal and/or described secondary signal.
Optionally, the carrier frequency signaling of described default frequency range comprises: the signal of the carrier frequency signaling of high frequency nature and the carrier frequency of low frequency attribute.
Optionally, described interference module, specifically for:
The mode of load-modulate or modulated carrier frequencies is adopted to send the undesired signal of answering with the Attribute Relative of described first signal and/or the undesired signal of answering with the Attribute Relative of described secondary signal.
Optionally, described supplementary module, also for when described interference module sends undesired signal, detects the first signal that described reader sends;
Accordingly, described interference module, also for:
When described supplementary module detects the first signal that described reader sends, continue to send undesired signal;
Or
When described supplementary module does not detect the first signal that described reader sends, stop sending undesired signal.
Optionally, the bin error of described undesired signal and described first signal and/or described secondary signal is in default error range.
Second aspect, present invention also offers a kind of data Anti-theft method, comprising:
Obtain the first signal that reader sends;
The attribute of described first signal is determined according to described first signal;
According to the attribute of described first signal determined, send the undesired signal of answering with the Attribute Relative of described first signal and/or the undesired signal of answering with the Attribute Relative of secondary signal, to make described undesired signal and described first signal and/or secondary signal superimposed, to disturb the data in described reader reading radio-frequency card;
Wherein, described secondary signal is the radio-frequency card data-signal that radio-frequency card sends in response to described first signal.
Optionally, the attribute of described first signal comprises high frequency nature and low frequency attribute;
Accordingly, the described attribute determining described first signal according to described first signal, comprising:
Detect the first signal of reader transmission and/or the secondary signal of radio-frequency card transmission;
Described first signal and/or described secondary signal are compared with the carrier frequency signaling of default frequency range respectively, determines the frequency range of described first signal and/or described secondary signal, obtain the attribute of described first signal and/or described secondary signal.
Optionally, the carrier frequency signaling of described default frequency range comprises: the signal of the carrier frequency signaling of high frequency nature and the carrier frequency of low frequency attribute.
Optionally, according to the attribute of described first signal determined, send the undesired signal of answering with the Attribute Relative of described first signal and/or the undesired signal of answering with the Attribute Relative of secondary signal, comprising:
According to the attribute of described first signal, the mode of load-modulate or modulated carrier frequencies is adopted to send the undesired signal of answering with the Attribute Relative of described first signal and/or the undesired signal of answering with the Attribute Relative of described secondary signal.
Optionally, when the undesired signal sending the undesired signal of answering with the Attribute Relative of described first signal and/or answer with the Attribute Relative of secondary signal, described method also comprises:
Detect the first signal whether getting described reader and send,
If had, continue to send undesired signal, otherwise, terminate.
Optionally, the bin error of described undesired signal and described first signal and/or described secondary signal is in default error range.
The third aspect, present invention also offers a kind of data Anti-theft device, comprising: the first coil, the second coil and frequency modulation unit;
Described first coil, the secondary signal that the first signal and/or radio-frequency card for detecting reader transmission send;
Described frequency modulation unit, for according to the first signal of described first Coil Detector and/or secondary signal, modulate described second coil and send undesired signal, to make described undesired signal disturb communication between described reader and radio-frequency card, thus make reader cannot read data in radio-frequency card.
Optionally, described frequency modulation unit, specifically for:
Determine the described attribute of the first signal and/or the attribute of secondary signal, send undesired signal by the voltage or electric current modulating described second coil.
Optionally, described first coil is magnetic test coil, and described second coil is transmitting coil.
Optionally, described device also comprises: for the power supply of powering for described frequency modulation unit.
Optionally, described device also comprises: touch key-press unit and the display unit be connected with described touch key-press unit;
Described touch key-press unit, for when receiving the touch instruction of user, sends electricity display command to described display unit;
Described display unit, for when receiving the electricity display command that described touch key-press unit sends, shows the electricity of described power supply.
Optionally, described first coil and described second coil are also for being described power source charges.
Fourth aspect, present invention also offers a kind of data Anti-theft system, comprises above-mentioned data Anti-theft device, and with the radio-frequency card of described data Anti-theft device in preset range;
In the reading radio-frequency card that reader sends during the first signal of data, described radio-frequency card sends secondary signal, described data Anti-theft device sends undesired signal simultaneously, to make described undesired signal disturb communication between described reader and radio-frequency card, thus make reader cannot read data in radio-frequency card.
As shown from the above technical solution; device and method is stolen by a kind of data side provided by the invention; by obtaining the signal that reader sends; after determining the attribute of this signal, then send undesired signal according to this attribute, and then the communication between interference reading device and radio-frequency card; make reader cannot read data in radio-frequency card; this apparatus structure is simple, protects the safety of radio-frequency card data message, prevents the possibility that radio-frequency card data message is stolen.
In instructions of the present invention, describe a large amount of detail.But can understand, embodiments of the invention can be put into practice when not having these details.In some instances, be not shown specifically known method, structure and technology, so that not fuzzy understanding of this description.
Similarly, be to be understood that, to disclose and to help to understand in each inventive aspect one or more to simplify the present invention, in the description above to exemplary embodiment of the present invention, each feature of the present invention is grouped together in single embodiment, figure or the description to it sometimes.But, the method for the disclosure should not explained the following intention in reflection: namely the present invention for required protection requires feature more more than the feature clearly recorded in each claim.Or rather, as claims below reflect, all features of disclosed single embodiment before inventive aspect is to be less than.Therefore, the claims following embodiment are incorporated to this embodiment thus clearly, and wherein each claim itself is as independent embodiment of the present invention.
It will be understood by those skilled in the art that adaptively to change the module in the equipment in embodiment and they are arranged and be in one or more equipment that this embodiment is different.Module in embodiment or unit or assembly can be combined into a module or unit or assembly, and multiple submodule or subelement or sub-component can be put them in addition.Except at least some in such feature and/or process or unit is mutually exclusive part, any combination can be adopted to combine all processes of all features disclosed in this instructions (comprising adjoint claim, summary and accompanying drawing) and so disclosed any method or equipment or unit.Unless expressly stated otherwise, each feature disclosed in this instructions (comprising adjoint claim, summary and accompanying drawing) can by providing identical, alternative features that is equivalent or similar object replaces.
In addition, those skilled in the art can understand, although embodiments more described herein to comprise in other embodiment some included feature instead of further feature, the combination of the feature of different embodiment means and to be within scope of the present invention and to form different embodiments.Such as, in the following claims, the one of any of embodiment required for protection can use with arbitrary array mode.
All parts embodiment of the present invention with hardware implementing, or can realize with the software module run on one or more processor, or realizes with their combination.It will be understood by those of skill in the art that the some or all functions that microprocessor or digital signal processor (DSP) can be used in practice to realize according to the some or all parts in the equipment of a kind of browser terminal of the embodiment of the present invention.The present invention can also be embodied as part or all equipment for performing method as described herein or device program (such as, computer program and computer program).Realizing program of the present invention and can store on a computer-readable medium like this, or the form of one or more signal can be had.Such signal can be downloaded from internet website and obtain, or provides on carrier signal, or provides with any other form.
The present invention will be described instead of limit the invention to it should be noted above-described embodiment, and those skilled in the art can design alternative embodiment when not departing from the scope of claims.In the claims, any reference symbol between bracket should be configured to limitations on claims.Word " comprises " not to be got rid of existence and does not arrange element in the claims or step.Word "a" or "an" before being positioned at element is not got rid of and be there is multiple such element.The present invention can by means of including the hardware of some different elements and realizing by means of the computing machine of suitably programming.In the unit claim listing some devices, several in these devices can be carry out imbody by same hardware branch.Word first, second and third-class use do not represent any order.Can be title by these word explanations.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme, it all should be encompassed in the middle of the scope of claim of the present invention and instructions.
Accompanying drawing explanation
Fig. 1 is the communication scheme that in prior art, reader reads radio-frequency card data message;
The schematic flow sheet of the data Anti-theft method that Fig. 2 provides for one embodiment of the invention;
The schematic flow sheet of the data Anti-theft method that Fig. 3 provides for another embodiment of the present invention;
The schematic flow sheet of the data Anti-theft method that Fig. 4 provides for another embodiment of the present invention;
The schematic flow sheet of the data Anti-theft method that Fig. 5 provides for another embodiment of the present invention;
The structural representation of the data Anti-theft device that Fig. 6 provides for one embodiment of the invention;
The communication scheme of the data Anti-theft device transmission undesired signal that Fig. 7 provides for one embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of invention is further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
In order to make reader cannot read the technical scheme of the data in radio-frequency card in the clearer explanation embodiment of the present invention, below the communication process of some simple concepts and reader and radio-frequency card is briefly described.
Co-channel interference in following embodiment, for the carrier frequency of garbage signal identical with the carrier frequency of useful signal time, and to receiving the interference caused with the receiver of frequently useful signal.
Magnetic coupling resonance, by the near-field coupling in magnetic field, makes receiving coil and transmitting coil produce resonance, realizes the wireless transmission of energy.
Wherein, the communication process of reader and radio-frequency card is as follows:
Reader activates radio-frequency card according to magnetic coupling harmonic technology by radio-frequency field, and now radio-frequency card can wait for the reading order of reader; Reader sends the radiofrequency signal of certain carrier frequency to radio-frequency card afterwards, after radio-frequency card receives radiofrequency signal, the energy obtained by means of induction current sends radio-frequency card data message to reader, as shown in Figure 1, such as: when to send frequency be the radiofrequency signal of the read requests of 13.56MHz to reader, then radio-frequency card can send the answer signal that subcarrier frequency is 847KHz.
On the basis that above-mentioned reader communicates with radio-frequency card, in order to prevent some lawless persons from adopting above-mentioned technology by the information in reader malice reading radio-frequency card, the present invention proposes a kind of data Anti-theft method.
Fig. 2 shows the schematic flow sheet of the data Anti-theft method that the embodiment of the present invention provides, and as shown in Figure 2, the method comprises the following steps:
201, the first signal that reader sends is obtained;
Above-mentioned first signal can be understood as reader reads radiofrequency signal from radio-frequency card data message to the request that radio-frequency card sends.
202, the attribute of described first signal is determined according to described first signal;
For example, above-mentioned first signal can be divided into high-frequency signal (as 13.56MHz), intermediate-freuqncy signal and low frequency signal (as 125KHz ~ 135KHz) according to frequency range, accordingly, the attribute of the first signal comprises high frequency nature, intermediate frequency attribute and low frequency attribute.
203, according to the attribute of described first signal determined, send the undesired signal of answering with the Attribute Relative of described first signal and/or the undesired signal of answering with the Attribute Relative of secondary signal, to make described undesired signal and described first signal and/or secondary signal superimposed, to disturb the data in described reader reading radio-frequency card;
Wherein, described secondary signal is the radio-frequency card data-signal that radio-frequency card sends in response to described first signal.
The first signal that the method sends by obtaining reader; after determining the attribute of the first signal; undesired signal is sent again according to this attribute; and then the communication between interference reading device and radio-frequency card; make reader cannot read data in radio-frequency card; protect the safety of radio-frequency card data message, prevent the possibility that radio-frequency card data message is stolen.
In above-mentioned steps 202, determine the attribute of described first signal according to described first signal, comprise unshowned following sub-step in Fig. 2:
2021, the first signal of reader transmission and/or the secondary signal of radio-frequency card transmission is detected;
2022, described first signal and/or described secondary signal are compared with the carrier frequency signaling of default frequency range respectively, determine the frequency range of described first signal and/or described secondary signal, obtain the attribute of described first signal and/or described secondary signal.
The carrier frequency signaling presetting frequency range in above-mentioned steps 2022 comprises: the signal of the carrier frequency signaling of high frequency nature, the carrier frequency of low frequency attribute.In a particular application, the carrier frequency signaling of this default frequency range can also comprise the carrier frequency signaling of intermediate frequency attribute.
Will be understood that, this step 202 is mainly in order to obtain the attribute of the signal of reader and radio-frequency card transmission, certainly, communication protocol is met during owing to communicating between reader and radio-frequency card, after the attribute getting the first signal that reader sends, just indirectly can learn the attribute of the secondary signal that radio-frequency card will send to reader.
Concrete, in above-mentioned steps 203 after the attribute learning the first signal, just can send the undesired signal corresponding with this attribute according to co-channel interference technology.In a particular application, the Attribute Relative of this undesired signal and described first signal should and/or should with the Attribute Relative of secondary signal.That is, this undesired signal can be superimposed with secondary signal, for the secondary signal preventing reader from reading radio-frequency card transmission; This undesired signal can also be superimposed with the first signal, for the first signal preventing radio-frequency card from obtaining reader transmission; This undesired signal can also simultaneously with the first signal and secondary signal superimposed, not only prevented reader from reading secondary signal that radio-frequency card sends but also the first signal preventing from radio-frequency card from obtaining reader sending.
Below by three kinds of schemes, undesired signal interference reading device is described in detail with the method communicated between radio-frequency card.
The first scheme as shown in Figure 3, undesired signal and secondary signal superimposed, for prevent reader read radio-frequency card send secondary signal.
Fig. 3 shows the schematic flow sheet of the data Anti-theft method that the embodiment of the present invention provides, and as shown in Figure 3, the method comprises the following steps:
301, the first signal that reader sends is obtained;
Above-mentioned first signal can be understood as reader reads radiofrequency signal from radio-frequency card data message to the request that radio-frequency card sends.
302, the attribute of described first signal is determined according to described first signal;
303, according to the attribute of the first signal, the attribute of secondary signal is obtained;
Concrete, when learning the attribute of the first signal, according to reader and radio-frequency card communication transport protocols, the attribute of secondary signal just can be learnt.
304, according to the attribute of secondary signal, the undesired signal of answering with the Attribute Relative of secondary signal is sent to reader, to make undesired signal and secondary signal superimposed, to disturb the data in described reader reading radio-frequency card;
Wherein, described secondary signal is the radio-frequency card data-signal that radio-frequency card sends in response to described first signal.
Concrete, above-mentioned steps 304 can be understood as the attribute according to described secondary signal, adopts the mode of load-modulate to send the undesired signal of answering with the Attribute Relative of secondary signal.Also namely effectively can read the data message of radio-frequency card by interference reading device after making this undesired signal superpose with secondary signal, send the undesired signal of answering with the Attribute Relative of secondary signal to reader by the electric current changing coil.How the present embodiment is not modulated it and adopted which kind of mode to modulate is described in detail.
Changing coil current can by regulating according to the beat of data stream the electrical quantity of oscillation circuit, make the error of its undesired signal and secondary signal in preset range λ (such as: λ=125KHz), such as | undesired signal-secondary signal | < λ.
In like manner, also can be modulated by modulated carrier frequencies, send the undesired signal of answering with the Attribute Relative of secondary signal.Also namely effectively can read the data message of radio-frequency card by interference reading device after making this undesired signal superpose with secondary signal, send the undesired signal of answering with the Attribute Relative of secondary signal to reader by the voltage changing coil.
The voltage changing coil mainly controls the number of times opened with turn off of device for power switching by PWM ripple, the undesired signal making it generate and the error of secondary signal in preset range λ (such as: λ=125KHz), such as | undesired signal-secondary signal | < λ.First scheme as shown in Figure 4, undesired signal and the first signal superimposed, for prevent radio-frequency card obtain reader send the first signal.
Fig. 4 shows the schematic flow sheet of the data Anti-theft method that the embodiment of the present invention provides, and as shown in Figure 4, the method comprises the following steps:
401, the first signal that reader sends is obtained;
Above-mentioned first signal can be understood as reader reads radiofrequency signal from radio-frequency card data message to the request that radio-frequency card sends.
402, the attribute of described first signal is determined according to described first signal;
403, according to the attribute of the first signal, the undesired signal of answering with the Attribute Relative of the first signal is sent to radio-frequency card, to make undesired signal and the first signal superimposed, to disturb the data in described reader reading radio-frequency card.
Concrete, above-mentioned steps 403 can be understood as the attribute according to described first signal, adopts the mode of load-modulate to send the undesired signal of answering with the Attribute Relative of the first signal.Also namely effectively can read the data message of radio-frequency card by interference reading device after making this undesired signal and the first Signal averaging, send the undesired signal of answering with the Attribute Relative of the first signal to radio-frequency card by the electric current changing coil.How the present embodiment is not modulated it and adopted which kind of mode to modulate is described in detail.
Changing coil current can by regulating according to the beat of data stream the electrical quantity of oscillation circuit, make the error of its undesired signal and the first signal in preset range λ (such as: λ=125KHz), such as | undesired signal-secondary signal | < λ.
In like manner, also can be modulated by modulated carrier frequencies, send the undesired signal of answering with the Attribute Relative of the first signal.Also namely effectively can read the data message of radio-frequency card by interference reading device after making this undesired signal and the first Signal averaging, send the undesired signal of answering with the Attribute Relative of the first signal to radio-frequency card by the voltage changing coil.
The voltage changing coil mainly controls the number of times opened with turn off of device for power switching by PWM ripple, the error of the undesired signal making it generate and the first signal in preset range λ (such as: λ=125KHz), such as | undesired signal-secondary signal | < λ.
The third scheme as shown in Figure 5, undesired signal can also simultaneously with the first signal and secondary signal superimposed, not only prevented reader from reading secondary signal that radio-frequency card sends but also the first signal preventing from radio-frequency card from obtaining reader sending.
Fig. 5 shows the schematic flow sheet of the data Anti-theft method that the embodiment of the present invention provides, and as shown in Figure 5, the method comprises the following steps:
501, the first signal that reader sends is obtained;
Above-mentioned first signal can be understood as reader reads radiofrequency signal from radio-frequency card data message to the request that radio-frequency card sends.
502, the attribute of described first signal is determined according to described first signal;
Concrete, when learning the attribute of the first signal, according to reader and radio-frequency card communication transport protocols, the attribute of secondary signal just can be learnt.
503, according to the attribute of the first signal, first undesired signal of answering with the Attribute Relative of secondary signal is sent and to the second undesired signal that radio-frequency card sends and the Attribute Relative of the first signal is answered to reader, with make the first undesired signal and the second undesired signal respectively with secondary signal and the first signal superimposed, read data in radio-frequency card to disturb described reader;
Wherein, described secondary signal is the radio-frequency card data-signal that radio-frequency card sends in response to described first signal.
Concrete, above-mentioned steps 503 can be understood as the attribute according to described secondary signal, the mode of load-modulate is adopted to send first undesired signal of answering with the Attribute Relative of secondary signal, simultaneously according to the attribute of described first signal, the mode of load-modulate is adopted to send second undesired signal of answering with the Attribute Relative of the first signal.Also namely effectively the data message of radio-frequency card can be read by interference reading device after making the first undesired signal superpose with secondary signal, the undesired signal of answering with the Attribute Relative of secondary signal is sent to reader by the electric current changing coil, simultaneously, effectively can read the data message of radio-frequency card by interference reading device after making the second undesired signal and the first Signal averaging, send the undesired signal of answering with the Attribute Relative of the first signal to radio-frequency card by the electric current changing coil.How the present embodiment is not modulated it and adopted which kind of mode to modulate is described in detail.
Changing coil current can by regulating according to the beat of data stream the electrical quantity of oscillation circuit, make the error of its first undesired signal and secondary signal in preset range, the error of the second undesired signal and the first signal in preset range λ (such as: λ=125KHz), such as | undesired signal-secondary signal | < λ.
In like manner, also can pass through modulated carrier frequencies, send first undesired signal of answering with the Attribute Relative of secondary signal, and the second undesired signal that the Attribute Relative of transmission and the first signal is answered.Also namely effectively can read the data message of radio-frequency card by interference reading device after making the first undesired signal superpose with secondary signal, send first undesired signal of answering with the Attribute Relative of secondary signal to reader by the voltage changing coil; Meanwhile, also can pass through modulated carrier frequencies, send second undesired signal of answering with the Attribute Relative of the first signal.Also namely effectively can read the data message of radio-frequency card by interference reading device after making this second undesired signal and the first Signal averaging, send second undesired signal of answering with the Attribute Relative of the first signal to radio-frequency card by the voltage changing coil.
The voltage changing coil mainly controls the number of times opened with turn off of device for power switching by PWM ripple, the first undesired signal making it generate and the error of secondary signal are in preset range, the error of the second undesired signal and the first signal in preset range λ (such as: λ=125KHz), such as | undesired signal-secondary signal | < λ.
In the implementation process of above-mentioned three kinds of schemes, when sending undesired signal, timing simultaneously detects the first signal whether getting reader and send, if had, continues to send undesired signal, otherwise, terminate.
Fig. 6 shows the structural representation of the data Anti-theft device that the embodiment of the present invention provides, and as shown in Figure 6, this data Anti-theft device comprises: supplementary module 61 and interference module 62.
Supplementary module 61, for obtaining the first signal that reader sends, determines the attribute of described first signal according to described first signal;
Interference module 62, for the attribute of described first signal determined according to described supplementary module, send the undesired signal of answering with the Attribute Relative of described first signal and/or the undesired signal of answering with the Attribute Relative of secondary signal, to make described undesired signal and described first signal and/or secondary signal superimposed, to disturb the data in described reader reading radio-frequency card;
Wherein, described secondary signal is the radio-frequency card data-signal that radio-frequency card sends in response to described first signal.
Concrete, interference module is in order to better produce interference effect, and the bin error of the undesired signal that interference module produces and described first signal and/or described secondary signal is in default error range.
The first signal that this device sends by obtaining reader; after determining the attribute of the first signal; undesired signal is sent again according to this attribute; and then the communication between interference reading device and radio-frequency card; make reader cannot read data in radio-frequency card; this apparatus structure is simple, protects the safety of radio-frequency card data message, prevents the possibility that radio-frequency card data message is stolen.
In a particular application, above-mentioned interference module can send the first undesired signal can be superimposed with secondary signal, for the secondary signal (as shown in Figure 7) preventing reader from reading radio-frequency card transmission; The second undesired signal can also be sent and the first signal is superimposed, the first signal obtaining reader for preventing radio-frequency card and send; Can also send simultaneously the first undesired signal and the second undesired signal respectively with secondary signal and the first signal superimposed, not only prevented reader from reading secondary signal that radio-frequency card sends but also the first signal preventing from radio-frequency card from obtaining reader sending.
Concrete, described supplementary module 61, specifically for:
Detect the first signal of reader transmission and/or the secondary signal of radio-frequency card transmission;
Described first signal and/or described secondary signal are compared with the carrier frequency signaling of default frequency range respectively, determines the frequency range of described first signal and/or described secondary signal, obtain the attribute of described first signal and/or described secondary signal.Wherein, the carrier frequency signaling presetting frequency range comprises: the carrier frequency signaling of high frequency nature, the signal of the carrier frequency of low frequency attribute and the carrier frequency signaling of intermediate frequency attribute.Such as frequency is that 125KHz signal has dropped in the scope of 115KHz ~ 135KHz frequency range, then the attribute of this frequency is low frequency attribute.
Above-mentioned supplementary module 61 according to the communication protocol between reader and radio-frequency card, by the attribute of the first signal, can also obtain the attribute of secondary signal.The attribute of wherein said first signal and the attribute of described secondary signal comprise high frequency nature, intermediate frequency attribute and low frequency attribute; Such as: carrier frequency is the signal of 13.56MHz is high frequency nature, frequency is the signal of 125KHz is low frequency attribute.
Described interference module 62, specifically for:
The mode of load-modulate or modulated carrier frequencies is adopted to send the undesired signal of answering with the Attribute Relative of described first signal and/or the undesired signal of answering with the Attribute Relative of described secondary signal.
Described supplementary module 61, also for when described interference module sends undesired signal, detects the first signal that described reader sends;
Described interference module 62, also for:
When described supplementary module detects the first signal that described reader sends, continue to send undesired signal;
Or
When described supplementary module does not detect the first signal that described reader sends, stop sending undesired signal.
Will be understood that, above-mentioned supplementary module is mainly used for waking this data Anti-theft device up, and auxiliary interference module work.
The embodiment of the present invention additionally provides a kind of data Anti-theft device, this data Anti-theft device can have any shape, in order to carry and place conveniently, also the shape similar with bank card can be made, also can be connected in series with automobile key etc. as key chain, the present embodiment does not limit the shape of this data Anti-theft device.
This data Anti-theft device comprises: the first coil 81, second coil 82 and frequency modulation unit 83;
Described first coil 81, the secondary signal that the first signal and/or radio-frequency card for detecting reader transmission send;
Described frequency modulation unit 83, for according to the first signal of described first Coil Detector and/or secondary signal, modulate described second coil 82 and send undesired signal, to make described undesired signal disturb communication between described reader and radio-frequency card, thus make reader cannot read data in radio-frequency card.
Concrete, above-mentioned first coil can be understood as magnetic test coil, and the second coil can be understood as transmitting coil.
This frequency modulation unit can be launched mode that is high-power and load-modulate and be carried out data encoding, then by the second coil, reader or the consistent undesired signal of radio-frequency card carrier frequency are disturbed, to prevent radio-frequency card information leakage, in specific implementation process, first coil is in state to be triggered, pass through electromagnetic induction, when the first coil detects the radiofrequency signal that reader launches, then frequency modulation unit sends with radiofrequency signal with undesired signal frequently according to the radiofrequency signal of the first Coil Detector.
Wherein radiofrequency signal correspondence comprises high-frequency signal, intermediate-freuqncy signal and low frequency signal, and bank card is paid in general sudden strain of a muscle, and work card etc. use high-frequency signal and reader to carry out data communication, and community access card etc. use low frequency signal and reader to carry out data communication.The information such as radio-frequency card can be prevented to be stolen by above-mentioned interference, in a particular application, this data Anti-theft device can also be applied to automobile key information stealth etc., and the present embodiment no longer carries out illustrated in greater detail.
Described frequency modulation unit 83, specifically for:
Determine the described attribute of the first signal and/or the attribute of secondary signal, send undesired signal by the voltage or electric current modulating described second coil.
Changing coil current can by regulating according to the beat of data stream the electrical quantity of oscillation circuit, make the error of its first undesired signal and secondary signal in preset range, the error of the second undesired signal and the first signal in preset range λ (such as: λ=125KHz), such as | undesired signal-secondary signal | < λ.
The voltage changing coil mainly controls the number of times opened with turn off of device for power switching by PWM ripple, the first undesired signal making it generate and the error of secondary signal are in preset range, the error of the second undesired signal and the first signal in preset range λ (such as: λ=125KHz), such as | undesired signal-secondary signal | < λ.
In a particular application, in this data Anti-theft device, radio-frequency coil, low-frequency coil, intermediate frequency coil can be set, concrete, radio-frequency coil can be two and comprise high-frequency detection coil and high-frequency emission coil, high-frequency detection coil can pass through parallel resonance or series resonance, for when detecting the radiofrequency signal that reader is launched, doing induction and triggering; High-frequency emission coil is after high-frequency detection coil triggers, and send undesired signal, high-frequency emission coil can pass through parallel resonance or series resonance, and send undesired signal, its interference effect is comparatively remarkable.
High-frequency detection coil and the high-frequency emission coil of this radio-frequency coil can work simultaneously, can be two coils separately, also can be reduced to one, it is identical with radio-frequency coil principle to take into account inspection and the effect low-frequency coil disturbed, and the present embodiment is no longer described in detail.
Said apparatus also comprises: for power supply 84, touch key-press unit 85 and the display unit 86 that is connected with described touch key-press unit of powering for described frequency modulation unit;
Touch key-press unit, for when receiving the touch instruction of user, sends electricity display command to described display unit;
Display unit, for when receiving the electricity display command that touch key-press unit sends, shows the electricity of described power supply.When dump energy is lower than preset value, can warning reminding.
Concrete, above-mentioned display unit can be led pilot lamp, and by the height of the effect instruction electricity such as flicker, also can be display screen, directly show the number percent of dump energy, can also adopt other display modes, the present embodiment be no longer described in detail.
Above-mentioned first coil and described second coil can also use as wireless charging interface.
Present invention also offers a kind of data Anti-theft system, dotted box part as shown in Figure 7, comprise above-mentioned data Anti-theft device, and with the radio-frequency card of described data Anti-theft device in preset range;
In the reading radio-frequency card that reader sends during the first signal of data, described radio-frequency card sends secondary signal, described data Anti-theft device sends undesired signal simultaneously, to make described undesired signal disturb communication between described reader and radio-frequency card, thus make reader cannot read data in radio-frequency card.
Embodiments of the invention disclose:
A1, a kind of data Anti-theft device, comprising:
Supplementary module, for obtaining the first signal that reader sends, determines the attribute of described first signal according to described first signal;
Interference module, for the attribute of described first signal determined according to described supplementary module, send the undesired signal of answering with the Attribute Relative of described first signal and/or the undesired signal of answering with the Attribute Relative of secondary signal, to make described undesired signal and described first signal and/or secondary signal superimposed, to disturb the data in described reader reading radio-frequency card;
Wherein, described secondary signal is the radio-frequency card data-signal that radio-frequency card sends in response to described first signal.
A2, device according to A1, the attribute of described first signal and the attribute of described secondary signal comprise high frequency nature and low frequency attribute;
Accordingly, described supplementary module, specifically for:
Detect the first signal of reader transmission and/or the secondary signal of radio-frequency card transmission;
Described first signal and/or described secondary signal are compared with the carrier frequency signaling of default frequency range respectively, determines the frequency range of described first signal and/or described secondary signal, obtain the attribute of described first signal and/or described secondary signal.
A3, device according to A2, the carrier frequency signaling of described default frequency range comprises: the signal of the carrier frequency signaling of high frequency nature and the carrier frequency of low frequency attribute.
A4, device according to A1, described interference module, specifically for:
The mode of load-modulate or modulated carrier frequencies is adopted to send the undesired signal of answering with the Attribute Relative of described first signal and/or the undesired signal of answering with the Attribute Relative of described secondary signal.
A5, device according to any one of A1-A4,
Described supplementary module, also for when described interference module sends undesired signal, detects the first signal that described reader sends;
Accordingly, described interference module, also for:
When described supplementary module detects the first signal that described reader sends, continue to send undesired signal;
Or
When described supplementary module does not detect the first signal that described reader sends, stop sending undesired signal.
A6, device according to any one of A1-A5, the bin error of described undesired signal and described first signal and/or described secondary signal is in default error range.
B7, a kind of data Anti-theft method, comprising:
Obtain the first signal that reader sends;
The attribute of described first signal is determined according to described first signal;
According to the attribute of described first signal determined, send the undesired signal of answering with the Attribute Relative of described first signal and/or the undesired signal of answering with the Attribute Relative of secondary signal, to make described undesired signal and described first signal and/or secondary signal superimposed, to disturb the data in described reader reading radio-frequency card;
Wherein, described secondary signal is the radio-frequency card data-signal that radio-frequency card sends in response to described first signal.
B8, method according to B7, the attribute of described first signal comprises high frequency nature and low frequency attribute;
Accordingly, the described attribute determining described first signal according to described first signal, comprising:
Detect the first signal of reader transmission and/or the secondary signal of radio-frequency card transmission;
Described first signal and/or described secondary signal are compared with the carrier frequency signaling of default frequency range respectively, determines the frequency range of described first signal and/or described secondary signal, obtain the attribute of described first signal and/or described secondary signal.
B9, method according to B8, the carrier frequency signaling of described default frequency range comprises: the signal of the carrier frequency signaling of high frequency nature, the carrier frequency of low frequency attribute.
B10, method according to B7, according to the attribute of described first signal determined, send the undesired signal of answering with the Attribute Relative of described first signal and/or the undesired signal of answering with the Attribute Relative of secondary signal, comprising:
According to the attribute of described first signal, the mode of load-modulate or modulated carrier frequencies is adopted to send the undesired signal of answering with the Attribute Relative of described first signal and/or the undesired signal of answering with the Attribute Relative of described secondary signal.
B11, method according to any one of B7-B10, when the undesired signal sending the undesired signal of answering with the Attribute Relative of described first signal and/or answer with the Attribute Relative of secondary signal, described method also comprises:
Detect the first signal whether getting described reader and send,
If had, continue to send undesired signal, otherwise, terminate.
B12, method according to any one of B7-B11, the bin error of described undesired signal and described first signal and/or described secondary signal is in default error range.
C13, a kind of data Anti-theft device, comprising: the first coil, the second coil and frequency modulation unit;
Described first coil, the secondary signal that the first signal and/or radio-frequency card for detecting reader transmission send;
Described frequency modulation unit, for according to the first signal of described first Coil Detector and/or secondary signal, modulate described second coil and send undesired signal, to make described undesired signal disturb communication between described reader and radio-frequency card, thus make reader cannot read data in radio-frequency card.
C14, device according to C13, described frequency modulation unit, specifically for:
Determine the described attribute of the first signal and/or the attribute of secondary signal, send undesired signal by the voltage or electric current modulating described second coil.
C15, device according to C13, described first coil is magnetic test coil, and described second coil is transmitting coil.
C16, device according to C13, described device also comprises: for the power supply of powering for described frequency modulation unit.
C17, device according to C16, described device also comprises: touch key-press unit and the display unit be connected with described touch key-press unit;
Described touch key-press unit, for when receiving the touch instruction of user, sends electricity display command to described display unit;
Described display unit, for when receiving the electricity display command that described touch key-press unit sends, shows the electricity of described power supply.
C18, device according to C17, described first coil and described second coil are also for being described power source charges.
D19, a kind of data Anti-theft system, comprise the data Anti-theft device according to any one of claim 13-18, and with the radio-frequency card of described data Anti-theft device in preset range;
In the reading radio-frequency card that reader sends during the first signal of data, described radio-frequency card sends secondary signal, described data Anti-theft device sends undesired signal simultaneously, to make described undesired signal disturb communication between described reader and radio-frequency card, thus make reader cannot read data in radio-frequency card.
Claims (10)
1. a data Anti-theft device, is characterized in that, comprising:
Supplementary module, for obtaining the first signal that reader sends, determines the attribute of described first signal according to described first signal;
Interference module, for the attribute of described first signal determined according to described supplementary module, send the undesired signal of answering with the Attribute Relative of described first signal and/or the undesired signal of answering with the Attribute Relative of secondary signal, to make described undesired signal and described first signal and/or secondary signal superimposed, to disturb the data in described reader reading radio-frequency card;
Wherein, described secondary signal is the radio-frequency card data-signal that radio-frequency card sends in response to described first signal.
2. device according to claim 1, is characterized in that, the attribute of described first signal and the attribute of described secondary signal comprise high frequency nature and low frequency attribute;
Accordingly, described supplementary module, specifically for:
Detect the first signal of reader transmission and/or the secondary signal of radio-frequency card transmission;
Described first signal and/or described secondary signal are compared with the carrier frequency signaling of default frequency range respectively, determines the frequency range of described first signal and/or described secondary signal, obtain the attribute of described first signal and/or described secondary signal.
3. device according to claim 2, is characterized in that, the carrier frequency signaling of described default frequency range comprises: the signal of the carrier frequency signaling of high frequency nature and the carrier frequency of low frequency attribute.
4. device according to claim 1, is characterized in that, described interference module, specifically for:
The mode of load-modulate or modulated carrier frequencies is adopted to send the undesired signal of answering with the Attribute Relative of described first signal and/or the undesired signal of answering with the Attribute Relative of described secondary signal.
5. the device according to any one of claim 1-4, is characterized in that,
Described supplementary module, also for when described interference module sends undesired signal, detects the first signal that described reader sends;
Accordingly, described interference module, also for:
When described supplementary module detects the first signal that described reader sends, continue to send undesired signal;
Or
When described supplementary module does not detect the first signal that described reader sends, stop sending undesired signal.
6. the device according to any one of claim 1-5, is characterized in that, the bin error of described undesired signal and described first signal and/or described secondary signal is in default error range.
7. a data Anti-theft method, is characterized in that, comprising:
Obtain the first signal that reader sends;
The attribute of described first signal is determined according to described first signal;
According to the attribute of described first signal determined, send the undesired signal of answering with the Attribute Relative of described first signal and/or the undesired signal of answering with the Attribute Relative of secondary signal, to make described undesired signal and described first signal and/or secondary signal superimposed, to disturb the data in described reader reading radio-frequency card;
Wherein, described secondary signal is the radio-frequency card data-signal that radio-frequency card sends in response to described first signal.
8. a data Anti-theft device, is characterized in that, comprising: the first coil, the second coil and frequency modulation unit;
Described first coil, the secondary signal that the first signal and/or radio-frequency card for detecting reader transmission send;
Described frequency modulation unit, for according to the first signal of described first Coil Detector and/or secondary signal, modulate described second coil and send undesired signal, to make described undesired signal disturb communication between described reader and radio-frequency card, thus make reader cannot read data in radio-frequency card.
9. device according to claim 8, is characterized in that, described frequency modulation unit, specifically for:
Determine the described attribute of the first signal and/or the attribute of secondary signal, send undesired signal by the voltage or electric current modulating described second coil.
10. a data Anti-theft system, is characterized in that, comprises the data Anti-theft device according to any one of claim 13-18, and with the radio-frequency card of described data Anti-theft device in preset range;
In the reading radio-frequency card that reader sends during the first signal of data, described radio-frequency card sends secondary signal, described data Anti-theft device sends undesired signal simultaneously, to make described undesired signal disturb communication between described reader and radio-frequency card, thus make reader cannot read data in radio-frequency card.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510159222.2A CN104794436A (en) | 2015-04-03 | 2015-04-03 | Data theft preventing device and method |
| CN201811535948.1A CN109598159A (en) | 2015-04-03 | 2015-04-03 | Data Anti-theft device and method |
| PCT/CN2015/099008 WO2016155374A1 (en) | 2015-04-03 | 2015-12-25 | Data theft prevention device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510159222.2A CN104794436A (en) | 2015-04-03 | 2015-04-03 | Data theft preventing device and method |
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| CN201811535948.1A Division CN109598159A (en) | 2015-04-03 | 2015-04-03 | Data Anti-theft device and method |
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| CN104794436A true CN104794436A (en) | 2015-07-22 |
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| CN201811535948.1A Pending CN109598159A (en) | 2015-04-03 | 2015-04-03 | Data Anti-theft device and method |
| CN201510159222.2A Pending CN104794436A (en) | 2015-04-03 | 2015-04-03 | Data theft preventing device and method |
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| CN201811535948.1A Pending CN109598159A (en) | 2015-04-03 | 2015-04-03 | Data Anti-theft device and method |
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| WO (1) | WO2016155374A1 (en) |
Cited By (3)
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| WO2016155374A1 (en) * | 2015-04-03 | 2016-10-06 | 北京奇虎科技有限公司 | Data theft prevention device and method |
| CN106919875A (en) * | 2015-12-24 | 2017-07-04 | 北京奇虎科技有限公司 | A kind of method and apparatus of data protection |
| CN106919874A (en) * | 2015-12-24 | 2017-07-04 | 北京奇虎科技有限公司 | A kind of method and apparatus of data protection |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111654352A (en) * | 2020-05-28 | 2020-09-11 | 上海飞聚微电子有限公司 | Shielded radio frequency communication method and device |
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| CN109598159A (en) | 2019-04-09 |
| WO2016155374A1 (en) | 2016-10-06 |
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