JPH10169271A - Checking device and keyless entry device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent illegal unlocking or the like that is done by an illegal checking operation on a keyless entry' device which receives a code signal, checks the input code received with a prestored code, and performs locking or unlocking action according to the result checked. SOLUTION: A central processing unit 23 on the receiving side determines whether or not an input code received has similarity to a stored code, and, when a specified number or more of input codes received that have similarity are received within a specified time, determines that illegal checking has been done. When illegal checking has been identified, the command to operate an actuator 25 is inhibited by the central processing unit 23 to disable locking or unlocking action.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a verification device for verifying a unique code for the purpose of maintaining security and the like and a keyless entry device having such a verification function. The present invention relates to a collating device and a keyless entry device that can prevent the collation.

[0002]

2. Description of the Related Art In recent years, a so-called keyless entry device for unlocking or locking a door of a vehicle or the like by remote control using a radio signal has been known. As shown in FIGS. 10 and 11, for example, this device includes a wireless signal transmitting unit 1, a wireless signal receiving unit 2, a comparison determining unit 3, and an actuator 4 for driving a door locking device. Here, the transmission unit 1
Is a transmitter for transmitting a radio signal such as a radio signal as shown in FIG.
A wireless signal including contents for instructing unlocking or locking according to the operation of b is transmitted to the vehicle 5 provided with the receiving unit 2 and the like.

This device usually has a collation function for collating a unique code for the purpose of maintaining security or the like, and the switch 1a is provided only when the unique codes match.
Alternatively, it is configured to execute an unlocking or locking operation in accordance with the operation of 1b. That is, the same unique code as that of the comparison / determination unit 3 is stored in the transmission unit 1, and when unlocked or locked, this unique code is transmitted from the transmission unit 1 as a part of the wireless signal, and transmitted to the reception unit 2. Received. When the received code data is determined to be the same by the comparison / determination unit 3, the actuator 4 is operated by the control output of the comparison / determination unit 3 to perform the unlocking or locking operation.

[0004]

In the conventional keyless entry apparatus as described above, scanning of the unique code (operation of transmitting various codes to the receiving unit 2 one after another and collating) is not performed. Since this scanning is performed, the unlocking operation or the like can be performed at the time when the codes match in the comparison of the comparing and judging unit 3 because it has no judgment function or protection function. For this reason, there is a possibility that operation can be performed without relying on a legitimate transmitter in which the unique code is registered, or even without knowing the content of the unique code at all, and illegal acts such as unauthorized unlocking are sufficiently prevented. could not.

Accordingly, an object of the present invention is to provide a collation device and a keyless entry device which can judge an illegal collation by transmitting such an illegal code signal.

[0006]

According to a first aspect of the present invention, there is provided a verification apparatus, comprising: receiving a code signal;
In a matching device that compares received reception codes with a storage code stored in advance and outputs a signal corresponding to the comparison result to the controlled device, a plurality of reception codes received within a predetermined time are compared with the plurality of reception codes. It is characterized in that a determination is made as to whether or not there is similarity between the received codes, and based on a result of the determination of the similarity, there is provided a fraudulent judging function for judging improper collation.

A collation device according to a second aspect of the present invention receives a code signal, collates the received code with a storage code stored in advance, and outputs a signal corresponding to the collation result to the controlled device. The device determines whether there is a regularity among the plurality of received codes received within a predetermined time, and based on a result of the regularity determination, determines whether or not there is an illegal collation. It is characterized by having a judgment function.

A collation device according to a third aspect of the invention receives a code signal, collates the received code with a storage code stored in advance, and outputs a signal corresponding to the collation result to the controlled device. The apparatus determines whether there is a similarity between a plurality of received codes received continuously and determines whether or not there is a similarity between the plurality of received codes, and based on a result of the determination of the similarity, determines whether or not there is an unauthorized collation. It is characterized by having a function.

According to a fourth aspect of the present invention, a collating apparatus receives a code signal, collates the received code with a storage code stored in advance, and outputs a signal corresponding to the collation result to the controlled device. In the apparatus, for a plurality of received codes received continuously, it is determined whether there is regularity among the plurality of received codes, and based on a result of the determination of the regularity, an unauthorized determination is made to determine an illegal collation. It is characterized by having a function.

A collation device according to a fifth aspect of the present invention receives a code signal, collates the received code with a storage code stored in advance, and outputs a signal corresponding to the collation result to the controlled device. In the device, with respect to the received reception code, it is determined whether or not there is similarity to the storage code, and if a similar number of received codes is received within a prescribed time period, an incorrect check is made. It is provided with a fraudulent judging function for judging that

In the collation apparatus according to the present invention, when the illegality judging function judges that the collation is improper, the collation operation thereafter and the output of a signal corresponding to the collation result to the controlled device are prohibited. An operation prohibition function is provided.

A collation device according to a seventh aspect of the present invention is characterized in that the collation device has an alarm output function for issuing an alarm when it is determined by the illegality judging function that the collation is improper.

In the collation device according to the present invention, when the illegality judging function judges that the collation is an illegal collation, the collation device sends to the controlled device an invalid signal indicating that the collation is an illegal collation. An illegal signal output function for outputting is provided.

According to a ninth aspect of the present invention, there is provided a keyless entry apparatus for receiving a code signal, collating the received code with a storage code stored in advance, and performing an unlocking or locking operation according to the collation result. In a plurality of received codes received within a predetermined time or continuously, a determination is made as to whether there is similarity or regularity among the plurality of received codes, and based on the determination result, an illegal matching is determined. It is characterized by having a fraud judgment function.

According to a tenth aspect of the present invention, there is provided a keyless entry apparatus for receiving a code signal, collating the received code with a storage code stored in advance, and performing an unlocking or locking operation according to the collation result. In the received code, it is determined whether there is a similarity to the storage code, if the received code having a similarity is received more than a specified number within a specified time, it is determined that the improper verification It is characterized by having a fraud judgment function for judging.

The keyless entry device according to claim 11, further comprising an operation prohibition function for prohibiting an unlocking or locking operation by a subsequent verification operation when the illegality determination function determines that the verification is illegal. It is characterized by.

According to a twelfth aspect of the present invention, the keyless entry device has a release function of releasing the operation of the operation inhibiting function by an unlocking operation with a mechanical lock.

A keyless entry device according to a thirteenth aspect of the present invention is characterized in that the keyless entry device has an alarm output function for issuing an alarm when it is judged by the illegality judging function that the collation is improper.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. First Example First, a first example will be described. FIG. 1 is a block diagram showing the configuration of the transmission side (transmission unit) of the radio keyless entry device of the present embodiment, and FIG. 2 is a block diagram showing the configuration of the reception side of the device. Note that the keyless entry device of this example is a device provided for a vehicle, and has a conceptually the same configuration as that shown in FIG. 11 described in the related art, and thus corresponds to the configuration shown in FIG. In the following, the same reference numerals are used.

The transmitting section 1 is a portable small transmitter as shown in FIG. 11 specifically. As shown in FIG. 1, the switches 1a and 1b, the central processing unit 11, The device includes a device 12, a modulation circuit 13, and a transmission antenna. Here, the switches 1a and 1b are provided on the surface of the body as shown in FIG. 11 described above, and are switches for the operator to input a locking or unlocking command to the central processing unit 11.

The central processing unit 11 is, for example, a CPU of a microcomputer.
Alternatively, it operates according to a program registered in a ROM (not shown), and has a unique code and a switch 1 that are different for each device.
Command codes corresponding to the contents of the commands a and 1b are called from the storage device 12, and a transmission signal (in this case, a digital signal) containing these codes is output to the modulation circuit 13. The modulation circuit 13 includes the central processing unit 1
A circuit that modulates the transmission signal output from 1 into a high-frequency radio signal, and the signal is radiated to the space via the transmission antenna 14. The modulation circuit 13
Is not particularly limited, for example, AS
K (amplitude shift keying), FSK (frequency shift keying), PS
Various digital modulation methods such as K (phase shift modulation) can be adopted.

Next, as a configuration of the receiving side mounted on the vehicle 5, as shown in FIG. 2, a receiving antenna 21, a detection circuit 22, a central processing unit 23 (collating device), and a storage device 24 ( A matching device) and an actuator 25 (controlled device). A radio signal radiated from the transmitting antenna 14 is received by the receiving antenna 21, demodulated into a signal having the above-mentioned code by a detection circuit 22 corresponding to the above-mentioned modulation method, and output to the central processing unit 23. It has become.

The central processing unit 23 is, for example, a CPU of a microcomputer.
4 together with the collating device of the present invention. The central processing unit 23 includes a storage device 24 or a ROM (not shown).
In accordance with the program registered in FIG. 3, the processing shown in the flowchart of FIG. 3 described below is executed, and the same functions as those of the conventional comparison / determination unit 3 shown in FIG. And an operation prohibition function). The actuator 25 drives a door locking device (not shown) of the vehicle 5 in response to a command from the central processing unit 23 to realize a mechanical operation of unlocking or locking. Is equivalent to

Next, the operation and functions of the keyless entry device including the above-described collation device will be described. First, the function of the central processing unit 23 will be described with reference to the flowchart of FIG. The central processing unit 23 receives the code signal from the detection circuit 22 (step S2), and determines whether the received unique code matches the unique code stored in the storage device 24 (step S4). If it is determined that the unique codes match, the actuator 25 is operated to perform an operation (door unlocking or locking) according to the received command code (step S6), and then return to step S2 to repeat the processing. .

On the other hand, if the unique codes do not match in the determination in step S4, the flow advances to step S8 to analyze the received unique code, and further determine whether or not it is a similar code similar to the stored code. (Similar code determination) is performed (step S10). Here, the similar code determination is
In the process of determining whether the received unique code (corresponding to the received code of the present invention) is similar to the unique code (corresponding to the stored code of the present invention) stored in the storage device 24, for example, Do it.

That is, as shown in FIG. 4, an exclusive OR operation is performed between the received code and the registered unique code. Then, as a result of this operation, the smaller the number of bits that become “1”, the higher the similarity. For example, if the number of bits that become “1” is 50% or less of the total number of bits, “similarity” Is determined, and if it exceeds 50%, it is determined to be "not similar". The threshold value for determination is not limited to 50%, and may be appropriately set in consideration of the target performance and reliability of the fraud determination function.

If it is determined in step S10 that "not similar", the process returns to step S2 to repeat the processing. On the other hand, if it is determined that "similar", the process proceeds to step S2. Proceeding to S12, the value K of a counter for counting the number of receptions of similar reception codes (that is, similar codes) is incremented by one, and then step S1 is executed.
Proceed to 4. In step S14, it is determined from the value K of the counter whether or not a similar code equal to or more than the specified number has been received within the specified time T. If the similar code equal to or more than the specified number has not been received, the process returns to step S2 and the process returns. On the other hand, if more than the specified number of similar codes have been received, the process proceeds to step S16 to stop reception. Here, the process of stopping reception means that all the processes of steps S2 to S6 are not performed. In the process of step S16, only the unlocking or locking operation of step S6 may be prohibited, and the matching operation of steps S2 and S4 may be performed.

The specified time T at step S14 is
For example, it is set by the following equation (1). T = (N × t) ÷ A (1) Here, N is the average number of searches, and t is one code selection time. For example, if the number of code bits is n and the communication speed is 1000 bps, N = 2 ⁿ / 2 and t =
It becomes n × 10 ⁻³ . A is a coefficient, which is determined according to various situations, security level, and the like. The prescribed number in step S14 may be determined based on, for example, the following idea. That is, if the prescribed number is set to be small and strict, the possibility of malfunctioning at a place where many cars gather (a high-speed service area or the like) increases. Therefore,
Assuming extreme conditions such as trays and New Year, it is a value with some margin.

Next, the overall operation and operation of the keyless entry device of this embodiment will be described. Switch 1a of transmitting unit 1
Or, when 1b is operated, a radio signal including a command code corresponding to any of the switches and a unique code specific to the device is radiated from the transmitting antenna 14 by the function of the central processing unit 11 or the like. . The radiated radio signal is received by the receiving antenna 21, demodulated into code data via the detection circuit 22, and input to the central processing unit 23.

In the central processing unit 23, the processing shown in FIG. 3 is performed. If the received unique code is the same as that stored in the storage device 24, the received unique code is processed by the processing of steps S2 to S6. The operation (unlocking or locking operation) corresponding to the command code is performed via the actuator 25. Therefore, if a legitimate transmitter is used,
The key of the door of the vehicle 5 is unlocked or locked according to the operation of the switch 1a or 1b.

On the other hand, the received unique code is stored in the storage device 2
If it is not the same as the one stored in No. 4, the processing after step S8 is performed. Here, if the scanning of the unique code is performed for an unauthorized purpose, a large number of code signals are sequentially input via the receiving antenna 21 in a short time,
The input code signal always resembles the one stored in the storage device 24 as shown in FIG. For this reason, in the similar code discrimination in step S10, at some point in this case, code signals determined to be similar appear continuously one after another, and as a result, the number of received similar codes is defined in a short time. When the number exceeds the number, the process proceeds to step S16 with a high probability in the determination of step S14.

Thus, according to the processing after step S8, the illegal collation by scanning the unique code is determined with high reliability, and the illegality determination function of the present invention is realized. Collation processing and unlocking or locking operation are prohibited, and the operation prohibition function of the present invention is achieved. Therefore, according to the apparatus of this example, even if the unique code is scanned for an unauthorized purpose,
By this scanning, the collation processing, unlocking or locking operation can be automatically prohibited before the unique code is decrypted, and the defense against fraudulent acts is significantly improved as compared with the related art.

Second Example Next, a second example of the present invention will be described. FIG. 5 is a flowchart showing the processing contents of the central processing unit on the receiving side of the keyless entry device of the second example. It should be noted that the keyless entry device of this example further includes an unlocking sensor 2 and an alarm means 27 as shown by a dotted line in FIG. 2 as the configuration of the receiving side, and the processing contents of the central processing unit 23 on the receiving side ( Since some of the functions have features and the other configurations are the same as those in the first example, the same components or steps will be denoted by the same reference characters and redundant description will be omitted.

The unlocking sensor 26 is, for example, a sensor for mechanically or optically detecting that the locking device of the vehicle 5 has been unlocked, and when unlocked, a signal (corresponding to the unlocked state). (Hereinafter referred to as an unlock signal) to the central processing unit 23. The alarm means 27 also informs that the illegal collation is being performed under the control of the central processing unit 23.
Means for notifying the driver or the passenger of the vehicle 5 or the operator of the transmission unit 1 by sound, display, light, or the like, and specifically includes, for example, a speaker, a display, a display lamp, and the like.
The alarm means 27 is not limited to the vehicle 5 (receiving side), but may be provided in the transmitting unit 1 (transmitter). In this case, it is necessary to configure so that a radio signal can be transmitted from the receiving side to the transmitting side according to a command from the central processing unit 23 (that is, bidirectional communication is possible).

In the central processing unit 23, as shown in FIG. 5, if the unique codes do not match in the determination in step S4, the process proceeds to step S20, where the received unique code is analyzed, and the code is further stored (step S20). S20).
Next, the process proceeds to step S22, and it is determined whether or not a predetermined time has elapsed since the time when it was determined that the unique codes do not match in the determination of step S4. If it is determined that the time has not elapsed, the process returns to step S2 to repeat the process, and if it is determined that the time has elapsed, the process proceeds to step S24. The predetermined time here may be determined, for example, in the same manner as the above-mentioned specified time T.

In step S24, each time the process proceeds to step S20, the similarity between a plurality of stored unique codes is determined. This similarity determination is performed, for example, as follows, similarly to the similar code determination of the first example (step S10 in FIG. 3).

That is, of the plurality of unique codes stored in step S20, for example, two unique codes are selected at random, and an exclusive OR operation is performed between these unique codes. As a result of this operation, the similarity increases as the number of bits of “1” decreases, and therefore, for example, if the number of bits of “1” is 50% or less of the total number of bits, “similar” Is determined, and if it exceeds 50%, it is determined that "not similar". Or,
Among the plurality of unique codes stored in step S20,
Select a combination of multiple unique codes at random,
The exclusive OR operation is performed for each of these sets,
For example, when the number of bits that have become “1” is 50% or less, for example, when the majority is more than half, it may be determined that “similar”.

Further alternatively, among the plurality of unique codes stored in step S20, the exclusive OR operation is performed between each of the plurality of adjacent codes having the received order (stored order) adjacent to each other. Is 50.
For example, when the number of sets that are less than the percentage is more than the majority, it may be determined that “similar”. The threshold value for the above determination is not limited to 50% or a majority, but may be appropriately set in consideration of the target performance and reliability of the fraud determination function.

If it is determined in the step S24 that "they are not similar", a step S34 is executed.
And returns to step S2 to repeat the processing. On the other hand, if it is determined that they are "similar", the process proceeds to step S26 to stop reception, prohibits subsequent signal input and collation, or unlocking or locking operation, and proceeds to step S28. To output an alarm. Here, the alarm output means that the alarm means 27 is actuated to notify a driver or the like of the fact that the illegal collation has been performed, and the central processing unit 23 may use another system (for example, an engine control system) if necessary. Output a signal (illegal signal) notifying that there has been an illegal collation.

Next, at step S30, the lock sensor 2
It is determined based on the detection output of step 6 whether or not there is an unlocking operation by a mechanical lock. If there is no unlocking operation, the process of this step (step S30) is repeated. Returns to step S2 via steps S32 and S34 to repeat the processing. In step S32, the reception stop state in step S26,
The alarm output state by 28 is released. In step S34, the value of the clock that measures the time determined in step S22 is reset to zero, and the unique code data stored in step S20 is erased as necessary.

Next, the operation of the present embodiment configured as described above will be described. If the unique code is scanned for an unauthorized purpose, a large number of code signals are sequentially input via the receiving antenna 21 in a short time as described above, and the input code signal has a value Normally, the data is sequentially input so as to change continuously. For this reason, in the apparatus of this example, immediately after the scanning of the unique code is started and a predetermined time has elapsed, the similarity determination in step S24 is determined to be “similar” with a high probability.

Thus, according to the processing after step S20, the illegal collation by scanning of such a unique code is determined with a high probability, thereby realizing the illegality determining function of the present invention, and the subsequent processing in step S26 is performed. Verification processing, unlocking or locking operation is prohibited, and the operation prohibition function of the present invention is achieved. Therefore, according to the apparatus of this example, when the unique code is scanned for an unauthorized purpose,
The collation processing, unlocking or locking operation can be automatically prohibited immediately, and the defense against fraudulent acts is significantly improved as compared with the related art.

In addition, in the process of step S28, the driver or the like is notified that the illegal collation is being performed, and an illegal signal is output to another system (for example, an engine control system) if necessary. Thus, the alarm output function and the illegal signal output function of the present invention are achieved. Therefore, it is possible to immediately inform the driver or the like that the wrongdoing is being performed, and it is also possible to take measures such as prohibiting the engine start by the illegal signal, thereby further improving the crime prevention. Step S30,
By the unlocking operation by the mechanical lock in the process 32, the prohibition of the collation and the unlocking operation is released, and the release function of the present invention is achieved. This makes it easy for the user to return to the normal operation without performing complicated procedures when the illegal collation is determined and the subsequent collation operation or the like is prohibited, thereby improving the usability. .

Third Example Next, a third example of the present invention will be described. FIG. 6 is a flowchart showing the processing contents of the central processing unit on the receiving side of the keyless entry device of the third example. Note that the keyless entry device of this example has a feature in a part of the processing content (function) of the central processing unit on the receiving side, and the other configuration is the same as that of the second example. , The same reference numerals are used, and redundant description is omitted.

In the central processing unit 23, instead of the processing in step S24 in the second example, the following step S
24a is performed. That is, in step S24a,
Each time the process proceeds to step S20, the regularity between a plurality of stored unique codes is determined. This regularity determination is performed, for example, as follows.

That is, it is determined whether or not the plurality of unique codes stored in step S20 have some regularity in the order in which they are received. It is determined whether it has increased or decreased. If there is such regularity, it is determined that there is regularity, and if not, it is determined that there is no regularity. If it is determined in step S24a that "there is no regularity", the process returns to step S2 via step S34 and repeats the process. On the other hand, when it is determined that “there is regularity”, the process proceeds to step S26.

Next, the operation of the present embodiment configured as described above will be described. If the unique code is scanned for an unauthorized purpose, a large number of code signals are sequentially input via the receiving antenna 21 in a short time as described above, and the input code signal has a value Normally, the data is sequentially input with regularity so as to change continuously. For this reason, in the apparatus of the present example, immediately after the scanning of the unique code is started and a predetermined time has elapsed, it is determined with high probability that “regularity exists” in the regularity determination in step S24a.

Therefore, according to the apparatus of the present embodiment, when the unique code is scanned for an unauthorized purpose, the collation processing and the unlocking or locking operation can be automatically and promptly prohibited with high reliability. The same effect as that of the second example, such as the defensive property against impropriety is significantly improved as compared with the related art, can be obtained.

Fourth Example Next, a fourth example of the present invention will be described. FIG. 7 is a flowchart showing the processing contents of the central processing unit on the receiving side of the keyless entry device of the fourth example. Note that the keyless entry device of this example has a feature in a part of the processing content (function) of the central processing unit on the receiving side, and the other configuration is the same as that of the second example. , The same reference numerals are used, and redundant description is omitted.

The central processing unit 23 performs the following step S21 after the processing of step S20 in the second example, and performs the following processing of step S22a instead of the processing of step S22 in the second example. . That is, in step S21, after incrementing the value K1 of the counter for counting the number of received unique codes (the number stored in step S20) by one, the process proceeds to step S2.
Proceed to 2a.

In step S22a, it is determined whether or not the value of the counter value K1 has exceeded a prescribed number. If it is determined that the number is not equal to or more than the specified number, the process returns to step S2 to repeat the processing. If it is determined that the number is equal to or more than the specified number, the process proceeds to step S24. In this case, the process of step S34a is performed instead of the process of step S34 in the second example. This step S
At 34a, the value K1 of the counter determined at step S22a is reset to zero, and the unique code data stored at step S20 is erased as necessary.

According to the apparatus of this embodiment, when the unique code is scanned for an unauthorized purpose, the collation processing and the unlocking or locking operation are immediately performed when the number of received unique codes exceeds the specified number. The same effect as that of the second example can be obtained such that the prohibition can be automatically performed, and the defensive property against fraudulent acts is significantly improved as compared with the related art.

Fifth Example Next, a fifth example of the present invention will be described. FIG. 8 is a flowchart showing the processing content of the central processing unit on the receiving side of the keyless entry device of the fifth example. Note that the keyless entry apparatus of this example has a feature in a part of the processing content (function) of the central processing unit on the receiving side, and the other configuration is the same as that of the third example. , The same reference numerals are used, and redundant description is omitted.

In the central processing unit 23, after the processing of step S20 in the third example, step S20 is performed in the same manner as in the fourth example.
21 and the process of step S22a is performed in the same manner as in the fourth example, instead of the process of step S22 in the third example. Also, in this case, step S34 in the second example
Instead of the process of step S34a, the process of step S34a is performed as in the fourth example.

According to the apparatus of the present embodiment, when the unique code is scanned for an unauthorized purpose, the collation processing and the unlocking or locking operation are immediately performed when the number of received unique codes exceeds the specified number. The same effect as that of the second example can be obtained such that the prohibition can be automatically performed, and the defensive property against fraudulent acts is significantly improved as compared with the related art.

It should be noted that the present invention is not limited to the embodiment described above, but may have various other embodiments. For example, as a wireless signal, an optical signal such as an infrared ray may be used in addition to a radio wave. In this case, as shown in FIG. 9, the central processing unit 11 on the transmitting side transmits the light emitting element 3 via a driving circuit (not shown).
1 to radiate an optical signal containing a command code and a unique code into space, and transmit this optical signal via the light receiving element 32 and a receiving circuit (not shown) to the central processing unit 23 on the receiving side.
Should be input.

Further, a rolling code function for adding a rolling code to the unique code to be transmitted may be provided. That is, the transmitting side is provided with a counter function, and a value obtained by adding the value to the unique code is transmitted. The receiving side stores the previously received counter value, and if the counter value is different from the currently received counter value, the signal is determined to be a valid signal. In this case, the operation is not performed when the transmission signal is simply dead-copied, and the security is further improved in this respect. Furthermore, parity check, checksum, C
If an error detection function such as an RC code is provided, scanning for the purpose of analyzing this part has a high similarity, so that it is easy to judge fraud and security is enhanced.

The collation device of the present invention can be applied to any device or system that requires collation of unique information (for example, an ID number or a password) other than the keyless entry device. Needless to say, the controlled devices of the present invention are various devices that operate in accordance with the result of collation. Further, signals transmitted and received by the collation device of the present invention are not necessarily limited to wireless signals, and may be wired communications. In addition, it goes without saying that the keyless entry device of the present invention is not limited to vehicles, but can be applied to, for example, door keys of houses.

[0059]

According to the first aspect of the present invention, it is determined whether or not there is similarity between a plurality of received codes received within a predetermined time, and the similarity of the plurality of received codes is determined. It has a fraudulent judgment function that judges fraudulent collation based on the judgment result, so it can detect the scanning of the unique code made for the purpose of fraud which could not be detected conventionally, with high reliability, and the crime prevention property against fraudulent acts is remarkable improves.

That is, if the scanning of the unique code is performed for an unauthorized purpose, a large number of code signals are input one after another in a short time, and the value of the input code signal changes continuously. It is usual that they are input sequentially and have similarity. For this reason, in the device of the present example that determines unauthorized collation based on the similarity of the plurality of received codes, immediately after a scan of the unique code is started and a predetermined time elapses, such unauthorized access is highly likely. Can be detected.

According to the second aspect of the present invention, it is determined whether or not a plurality of received codes received within a predetermined time period have regularity. Based on the above, a fraudulent judgment function for judging an improper collation can be provided, so that scanning of a unique code performed for an improper purpose, which could not be detected conventionally, can be detected with high reliability, and the security against fraudulent acts is significantly improved. .

That is, if the scanning of the unique code is performed for an unauthorized purpose, a large number of code signals are sequentially input in a short time as described above, and the input code signal has a continuous value. Normally, they are sequentially input with regularity so as to change. For this reason, even in the device of the present invention that determines unauthorized collation based on the regularity of the plurality of received codes, immediately after a scan of the unique code is started and a predetermined time elapses, such illegal unauthorized collation is performed with a high probability. Matching can be detected.

According to the third aspect of the present invention, it is determined whether or not there is a similarity between a plurality of consecutively received codes, and the similarity determination result is obtained. A function for judging an improper collation based on the above is provided, so that scanning of a unique code for an improper purpose, which was also impossible in the past, can be detected with high reliability by the same operation as the device according to claim 1. As a result, the security against fraudulent acts is significantly improved.

According to the collation apparatus of the fourth aspect, it is determined whether or not there is a regularity among the plurality of received codes continuously received, and the result of the determination of the regularity is determined. A function for judging an improper collation based on the above is provided, so that scanning of a unique code for an improper purpose, which was also impossible in the past, can be detected with high reliability by the same operation as the device described in claim 2. As a result, the security against fraudulent acts is significantly improved.

According to the fifth aspect of the present invention, it is determined whether or not the received received code has similarity to the stored code, and the received code having similarity is received more than a prescribed number within a prescribed time. In the event that the verification is made, an improper judging function for judging the improper collation is provided. Therefore, it is possible to reliably detect the scanning of the unique code performed for an illegal purpose, which cannot be detected conventionally, and the security against fraudulent acts is remarkably improved.

That is, if the scanning of the unique code is performed for an unauthorized purpose, a large number of code signals are successively input in a short time as described above, and the input code signal can be decoded by scanning. As you move in the direction, it always resembles the stored code. For this reason, in the device of the present example that determines unauthorized collation based on the similarity between the received code and the stored code, at some point after the illegal scanning is started,
Code signals determined to be similar appear successively one after another. As a result, the number of received similar codes becomes a prescribed number or more in a short period of time, and such an illegal collation can be detected with a high probability.

According to the collation device of the present invention, when the illegality is judged by the illegality judging function, the subsequent collation operation or the output of the signal corresponding to the collation result to the controlled device is prohibited. With an operation prohibition function. For this reason, when the unique code is scanned for an unauthorized purpose, the collation operation and the like can be automatically prohibited immediately, and the defensive property against the illegal action is significantly improved as compared with the related art.

According to the collation apparatus of the seventh aspect, an alarm output function is provided for issuing an alarm when it is judged by the illegality judging function that the collation is improper. For this reason, it becomes possible to immediately notify the authorized user or the administrator of the improper conduct, and the security is further improved.

According to the collating apparatus of the present invention, when the illegal collation is judged by the illegality judging function, an illegal signal having the content of the illegal collation is sent to the controlled device. Equipped with an illegal signal output function. For this reason, when there is an incorrect collation, for example, measures such as disabling the operation of the controlled device and the scanning can be performed, and the security is further improved.

According to the keyless entry device of the ninth aspect, for a plurality of received codes received within a predetermined time or continuously, it is determined whether or not there is similarity or regularity among the plurality of received codes. In addition, a fraudulent judging function for judging improper collation based on this judgment result is provided. Therefore, by the same operation as the collating device described in claims 1 to 4, scanning of a unique code performed for an illegal purpose, which has also been impossible to detect in the past, can be detected with high reliability, and security against fraudulent acts is improved. Significantly improved.

According to the keyless entry device of the present invention, it is determined whether or not the received received code has similarity to the storage code, and the number of similar received codes is equal to or greater than a specified number within a specified time. An improper judgment function for judging an improper collation when received is provided. For this reason, by the same operation as the collation device described in claim 5, it is possible to reliably detect the scanning of the unique code which has been impossible to detect in the past and is performed for the purpose of fraud, and the security against fraud is remarkably improved. I do.

The keyless entry device according to the eleventh aspect has an operation prohibition function for prohibiting an unlocking or locking operation by a subsequent verification operation when an illegal verification is determined by the fraud determination function. . For this reason, when the scanning of the unique code is performed for an unauthorized purpose, the unlocking or locking operation can be immediately and automatically prohibited, and the protection against unauthorized actions is significantly improved as compared with the related art.

According to the keyless entry device of the twelfth aspect, there is provided a release function for releasing the function of the operation inhibition function by an unlocking operation with a mechanical lock. For this reason, when the illegal collation is determined and the unlocking or locking operation by the subsequent collation operation is prohibited, the user can easily return to the normal operation without performing a complicated procedure, and the ease of use is reduced. There is an effect of improving.

According to the keyless entry device of the thirteenth aspect, an alarm output function for issuing an alarm when an improper collation is judged by the improper judgment function is provided.
It is possible to immediately notify the authorized user or the administrator of the improper conduct, and the security is further improved.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration example of a transmission side of a keyless entry device of the present invention.

FIG. 2 is a block diagram illustrating a configuration example of a receiving side of the device.

FIG. 3 is a flowchart showing a first example of processing of the same device.

FIG. 4 is a diagram for explaining a process (an injustice judging function) of the apparatus.

FIG. 5 is a flowchart showing a second example of the process of the device.

FIG. 6 is a flowchart showing a third example of the processing of the same device.

FIG. 7 is a flowchart showing a fourth example of the process of the same device.

FIG. 8 is a flowchart showing a fifth example of the processing of the same device.

FIG. 9 is a block diagram showing another configuration example of the device.

FIG. 10 is a block diagram showing a general configuration of a keyless entry device.

FIG. 11 is a conceptual diagram of a keyless entry device for a vehicle.

[Explanation of symbols]

 23 Central Processing Unit (Verification Device) 24 Storage Device (Verification Device) 14 Transmitting Antenna 21 Receiving Antenna 25 Actuator (Controlled Device) 26 Unlock Sensor 27 Alarm Means

Continued on the front page (51) Int.Cl. ⁶ Identification code FI H04Q 9/00 311 H04Q 9/00 311N

Claims (13)

[Claims] 1. A collating device for receiving a code signal, collating the received code with a storage code stored in advance, and outputting a signal corresponding to the collation result to a controlled device, within a predetermined time period. A judgment is made as to whether there is a similarity between the received codes with respect to the received codes, and based on a result of the judgment of the similarity, an improper judgment function for judging an improper collation is provided. Matching device featuring. 2. A collating device for receiving a code signal, collating the received code with a storage code stored in advance, and outputting a signal corresponding to the collation result to a controlled device, wherein the collating device outputs For the received codes received, it is determined whether there is a regularity among the received codes, and based on the result of the determination of the regularity, it is provided with a fraudulent judgment function for judging an improper collation. Matching device featuring. 3. A collating device for receiving a code signal, collating the received code with a storage code stored in advance, and outputting a signal corresponding to the collation result to a controlled device. It is characterized in that it has a fraudulent judgment function for judging whether or not there is similarity between the plurality of received codes, and judging an improper collation based on the similarity judgment result. Collating device. 4. A collating apparatus for receiving a code signal, collating the received code with a stored code stored in advance, and outputting a signal corresponding to the collation result to a controlled device. It is characterized by having a fraudulent judgment function for judging whether or not there is a regularity among the plurality of received codes, and judging an improper collation based on a result of the regularity judgment. Collating device. 5. A collating apparatus for receiving a code signal, collating the received code with a storage code stored in advance, and outputting a signal corresponding to the collation result to a controlled device. With respect to the above, a determination is made as to whether or not there is similarity to the stored code, and when a received code having similarity is received for a specified number or more within a specified time, a fraud determination function for determining an improper verification is provided. A collation device, comprising: 6. An operation prohibition function for prohibiting a subsequent collation operation or outputting a signal in accordance with a collation result to the controlled device when an illegal collation is determined by the illegality determination function. The collation device according to claim 1, wherein: 7. The collating apparatus according to claim 1, further comprising an alarm output function for issuing an alarm when the illegal judging function determines that the collation is an illegal collation. 8. An illegal signal output function for outputting an illegal signal to the controlled device when the illegal judgment is made by the illegal judgment function to the controlled device. 6. The device according to claim 1, wherein
The collation device according to any one of the above. 9. A keyless entry device for receiving a code signal, collating the received code with a stored code stored in advance, and performing an unlocking or locking operation according to the collation result. A plurality of received codes received in the same manner, determine whether there is similarity or regularity among the plurality of received codes, and, based on the result of this determination, provide an unauthorized Keyless entry device characterized by the following. 10. A keyless entry device for receiving a code signal, collating the received code with a storage code stored in advance, and performing an unlocking or locking operation according to the collation result. It has a fraudulent judgment function for judging whether or not there is similarity to the stored code, and when a received code having similarity is received for a specified number or more within a specified time, it is determined to be an illegal collation. A keyless entry device characterized in that: 11. An operation prohibition function for prohibiting unlocking or locking operation by a subsequent collation operation when the illegality judging function judges that the collation is illegal. 10. The keyless entry device according to 10. 12. The keyless entry device according to claim 11, further comprising a release function for releasing the operation of the operation inhibition function by an unlocking operation by a mechanical lock. 13. The keyless entry device according to claim 9, further comprising an alarm output function for issuing an alarm when the illegal judgment is made by the illegal judgment function.