CN108182777B - Alarm method, device and system based on laser correlation technology - Google Patents
Alarm method, device and system based on laser correlation technology Download PDFInfo
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- CN108182777B CN108182777B CN201711471840.6A CN201711471840A CN108182777B CN 108182777 B CN108182777 B CN 108182777B CN 201711471840 A CN201711471840 A CN 201711471840A CN 108182777 B CN108182777 B CN 108182777B
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
- G08B13/181—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems
Abstract
The invention discloses an alarm method, device and system based on a laser correlation technique, relates to the technical field of safety, and can solve the problem that an intruder uses another laser transmitting end to irradiate a laser receiving end to cause the failure of an intrusion detection function. The method mainly comprises the following steps: a laser receiving end receives a laser signal; decrypting the laser signal according to a decryption algorithm corresponding to an encryption algorithm used by the laser transmitting end for encrypting the laser signal to obtain a decrypted laser signal; judging whether the decrypted laser signal conforms to a preset format or not; and if the preset format is not met, sending out alarm prompt information. The invention is mainly suitable for the scene of realizing intrusion detection based on the laser correlation technology.
Description
Technical Field
The invention relates to the technical field of safety, in particular to an alarm method, device and system based on a laser correlation technique.
Background
The laser correlation alarm system belongs to an active intrusion alarm system. A laser transmitting end and a laser receiving end are arranged in the warning area, and a laser fence is formed in the precaution area by the laser transmitting end and the laser receiving end which receive and send laser. The laser emitting end can emit a plurality of parallel invisible laser beams to a laser receiving end which is hundreds of meters away, and the laser receiving end and the laser emitting end form a complete optical path after receiving laser signals. When an intruder intrudes, the laser receiving in the optical path is blocked, so that the terminal alarm is realized.
However, when the intruder irradiates the laser receiving end with another laser emitting end, the laser receiving end still can receive the laser, so that an alarm is not given, and the intrusion detection function is further cracked.
Disclosure of Invention
In view of this, the present invention provides an alarm method, device and system based on laser correlation technique, which aims to solve the problem that an intruder uses another laser emitting end to irradiate a laser receiving end, which results in failure of intrusion detection function.
The purpose of the invention is realized by adopting the following technical scheme:
in a first aspect, the present invention provides an alarm method based on a laser correlation technique, where the method includes:
a laser receiving end receives a laser signal;
decrypting the laser signal according to a decryption algorithm corresponding to an encryption algorithm used by the laser transmitting end for encrypting the laser signal to obtain a decrypted laser signal;
judging whether the decrypted laser signal conforms to a preset format or not;
and if the preset format is not met, sending out alarm prompt information.
In a second aspect, the present invention provides an alarm device based on laser correlation technique, the device comprising:
a receiving unit for receiving a laser signal;
the decryption unit is used for decrypting the laser signal according to a decryption algorithm corresponding to an encryption algorithm used by the laser transmitting end for encrypting the laser signal to obtain a decrypted laser signal;
the judging unit is used for judging whether the decrypted laser signal conforms to a preset format or not;
and the alarm unit is used for sending out alarm prompt information when the preset format is not met.
In a third aspect, the present invention provides a storage medium storing a plurality of instructions adapted to be loaded by a processor and to execute the method for alarming based on laser correlation technique according to the first aspect.
In a fourth aspect, the present invention provides a laser receiving end, comprising a storage medium and a processor;
the processor is suitable for realizing instructions;
the storage medium adapted to store a plurality of instructions;
the instructions are adapted to be loaded by the processor and to perform the laser correlation technique based alerting method as described in the first aspect.
In a fifth aspect, the invention provides an alarm system based on a laser correlation technique, wherein the system comprises a laser emitting end and a laser receiving end;
the laser transmitting end is used for encrypting the laser signal according to an encryption algorithm and transmitting the encrypted laser signal to the laser receiving end;
the laser receiving end is used for receiving laser signals; according to the decryption algorithm corresponding to the encryption algorithm, carrying out decryption processing on the received laser signal to obtain a decrypted laser signal; judging whether the decrypted laser signal conforms to a preset format or not; and if the preset format is not met, sending out alarm prompt information.
By means of the technical scheme, the alarm method, the alarm device and the alarm system based on the laser correlation technique can enable the laser transmitting end to transmit the laser signal encrypted by the encryption algorithm to the laser receiving end, after the laser receiving end receives the laser signal, the laser signal is decrypted according to the decryption algorithm corresponding to the encryption algorithm, whether the decrypted laser signal meets the preset format or not is judged, when the decrypted laser signal does not meet the preset format, the alarm prompt information is sent under the condition that the laser signal is not received, and therefore an intruder can be prevented from using another laser transmitting end to transmit the laser signal to the laser receiving end to cause intrusion detection failure.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a flowchart illustrating an alarm method based on a laser correlation technique according to an embodiment of the present invention;
FIG. 2 is a flow chart of another alarm method based on laser correlation technique according to the embodiment of the present invention;
fig. 3 is a flowchart illustrating a further alarm method based on a laser correlation technique according to an embodiment of the present invention;
fig. 4 is a block diagram illustrating an alarm device based on a laser correlation technique according to an embodiment of the present invention;
fig. 5 shows a block diagram of another alarm device based on laser correlation technology according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The embodiment of the invention provides an alarm method based on a laser correlation technology, which is mainly applied to a laser receiving end, and as shown in figure 1, the alarm method mainly comprises the following steps:
101. the laser receiving end receives the laser signal.
The laser signal received by the laser receiving end may be transmitted by the original laser transmitting end, or may be transmitted by an intruder using another laser transmitting end. Therefore, after the laser receiving end receives the laser signal, it does not directly determine that there is no intruder, but first analyzes the received laser signal to determine, and the specific analysis process is step 102 and step 104.
102. And the laser receiving end decrypts the laser signal according to a decryption algorithm corresponding to the encryption algorithm used by the laser transmitting end for encrypting the laser signal, so as to obtain the decrypted laser signal.
In order to enable the laser receiving end to distinguish the source of the laser signal and prevent an intruder from cracking the laser signal transmitted by the original laser transmitting end as much as possible, the laser transmitting end firstly encrypts the laser signal by using an encryption algorithm before transmitting the laser signal to the laser receiving end and then transmits the encrypted laser signal to the laser receiving end. Therefore, after the laser receiving end receives the laser signal, the laser signal needs to be decrypted by using a decryption algorithm corresponding to the encryption algorithm, so that the source of the laser signal can be identified. The encryption algorithm comprises a symmetric encryption algorithm and an asymmetric encryption algorithm. The encryption and decryption algorithm can be an algorithm set by a developer when developing a laser correlation system, and can also be an algorithm which is agreed by a laser transmitting end and a laser receiving end.
103. And the laser receiving end judges whether the decrypted laser signal conforms to a preset format.
After the laser signal is encrypted, if an intruder cannot break the password, the laser signal emitted by the other laser emitting end used by the intruder is different from the laser signal emitted by the original laser emitting end, so that the decryption result obtained by the laser receiving end decrypting the two laser signals by using the decryption algorithm corresponding to the encryption algorithm of the original laser emitting end is also different. Therefore, a preset format can be set according to the characteristics of the unencrypted laser signal of the original laser transmitting terminal, so that whether the source of the received laser signal is the original laser transmitting terminal or not can be determined based on the preset format.
104. If the preset format is not met, the laser receiving end sends out alarm prompt information.
When the decrypted laser signal is determined to be not in accordance with the preset format, the received laser signal can be determined to be not the laser signal transmitted by the original laser transmitting end but the laser signal transmitted by the laser transmitting end used by the intruder, so that the related personnel can be notified by sending alarm prompt information to the related equipment.
The alarm method based on the laser correlation technique provided by the embodiment of the invention can enable the laser transmitting end to transmit the laser signal encrypted by using the encryption algorithm to the laser receiving end, after the laser receiving end receives the laser signal, the laser signal is decrypted according to the decryption algorithm corresponding to the encryption algorithm, then whether the decrypted laser signal conforms to the preset format is judged, when the decrypted laser signal does not conform to the preset format, the alarm prompt information is sent, and the alarm prompt information is sent under the condition that the laser signal is not received, so that an intruder can be prevented from using another laser transmitting end to transmit the laser signal to the laser receiving end to cause intrusion detection failure.
In order to prevent the intrusion detection function from being disabled due to the cracking of the encryption algorithm, another embodiment of the present invention provides two methods for improving the security, as shown in fig. 2 and 3.
As shown in fig. 2, the method mainly includes:
201. the laser receiving end receives different laser signals transmitted in a polling mode aiming at the signal marks.
Wherein each laser signal carries the actual information and the signal marks. That is to say, the meaning of this step is that the laser transmitting end transmits the laser signal carrying the signal mark and the actual information to the laser receiving end in terms of different signal mark polls, wherein one poll can finish transmitting the laser signal of all signal marks, and the next poll is transmitted repeatedly. The signal marks are used to mark one laser signal and not the actual information in the laser signal, so the actual information that needs to be transmitted is not necessarily the same every time, nor is it necessarily the same for polling.
Illustratively, one polling includes 4 laser signals, the laser emitting end needs to sequentially emit the laser signal 1 carrying the signal mark 1 and the actual information 1, the laser signal 2 carrying the signal mark 2 and the actual information 2, the laser signal 3 carrying the signal mark 3 and the actual information 3, and the laser signal 4 carrying the signal mark 4 and the actual information 4 to the laser receiving end, and then enters the next polling to sequentially emit the laser signal 5 carrying the signal mark 1 and the actual information 5, the laser signal 6 carrying the signal mark 2 and the actual information 6, the laser signal 7 carrying the signal mark 3 and the actual information 7, and the laser signal 8 carrying the signal mark 4 and the actual information 8. Wherein, the actual information 1-8 may be the same or different.
In practical application, the function of polling and transmitting different laser signals can be realized through one laser transmitting end, specifically, the laser receiving end receives different laser signals transmitted by the laser transmitting end in a polling mode aiming at signal marks, and each laser signal carries actual information and a signal mark; the function of polling different laser signals can also be realized by a plurality of laser transmitting terminals, specifically, the laser receiving terminal receives different laser signals transmitted by the plurality of laser transmitting terminals in a polling manner aiming at the signal marks, and each laser signal carries actual information and the signal marks. The number of the plurality of laser emitting ends can be the same as the number of the signal marks, and the signal marks can be represented by device identifiers when the plurality of laser emitting ends are arranged.
For example, if one poll includes 4 laser signals, when the 4 laser transmitting terminals poll to transmit the laser signals to the laser receiving terminal, the specific transmission mode may be as follows: the laser emitting end 1 firstly emits a laser signal 1 carrying a signal mark 1 and actual information 1, then the laser emitting end 2 emits a laser signal 2 carrying a signal mark 2 and actual information 2, then the laser emitting end 3 emits a laser signal 3 carrying a signal mark 3 and actual information 3, finally the laser emitting end 4 emits a laser signal 4 carrying a signal mark 4 and actual information 4, then the laser emitting end 1-4 sequentially emits a laser signal 5 carrying a signal mark 1 and actual information 5, a laser signal 6 carrying a signal mark 2 and actual information 6, a laser signal 7 carrying a signal mark 3 and actual information 7, and a laser signal 8 carrying a signal mark 4 and actual information 8 after entering next polling. Wherein, the actual information 1-8 may be the same or different.
202. And the laser receiving end decrypts the laser signal according to a decryption algorithm corresponding to the encryption algorithm used by the laser transmitting end for encrypting the laser signal, so as to obtain the decrypted laser signal.
203. And the laser receiving end judges whether the decrypted laser signal conforms to a preset format.
204. If the preset format is not met, the laser receiving end sends out alarm prompt information.
In practical application, the same encryption and decryption algorithm can be set for laser signals marked by different signals, and different encryption and decryption algorithms can be set, and compared with the former, the latter has lower probability of password cracking. The following describes specific implementation manners of steps 202-204 for these two cases:
the first method is as follows: when the same encryption and decryption algorithm is used, the laser emitting end can encrypt the signal mark and the actual information together. The specific implementation manner of the steps 202-204 may be as follows: the laser receiving end decrypts the laser signal to obtain a plaintext of the signal mark and a plaintext of the actual information; judging whether the plaintext of the signal mark is the signal mark to be received at this time, and judging whether the plaintext of the actual information conforms to a preset actual information format; and if the plaintext of the signal mark is not the signal mark to be received at this time, or the plaintext of the actual information does not conform to the preset actual information format, sending the alarm prompt information, otherwise, not sending the alarm prompt information.
It should be added that if the decrypted laser signal cannot distinguish which part is the plaintext of the signal mark and which part is the plaintext of the actual information (for example, after decryption, both parts are messy codes), the alarm prompt information is sent out.
For example, if the signal mark of the laser signal received last time by the laser receiving end is 2, the signal mark of the laser signal to be received this time should be 3. After the laser receiving end receives the laser signal, the laser signal can be decrypted firstly to see whether the plaintext of the signal mark and the plaintext of the actual information can be obtained or not; if the information can not be obtained, directly sending out alarm prompt information; if the information is available, judging whether the plaintext of the signal mark is 3, judging whether the plaintext of the actual information accords with a preset format, if one of the plaintext accords with the preset format, sending out alarm prompt information, and if the plaintext accords with the preset format, not processing.
The second method comprises the following steps: when different encryption and decryption algorithms are used, the laser transmitting end can only encrypt the actual information, but not encrypt the signal marks. The specific implementation manner of the steps 202-204 may be as follows: the laser receiving end decrypts the actual information according to the decryption algorithm corresponding to the signal mark to obtain a plaintext of the actual information, different signal marks correspond to different decryption algorithms, and each decryption algorithm is matched with an encryption algorithm used when the laser transmitting end encrypts the actual information; judging whether the plaintext of the actual information conforms to a preset actual information format; if the plaintext of the actual information does not conform to the preset actual information format, sending out alarm prompt information, otherwise, not sending out the alarm prompt information.
Illustratively, if one polling includes 2 laser signals, the laser transmitting end encrypts the actual information 1 by using an encryption algorithm 1, and then transmits the encrypted actual information 1 and the laser signals of the signal mark 1 to the laser receiving end, after the laser receiving end receives the laser signals, the laser receiving end determines a decryption algorithm to be used as the decryption algorithm 1 according to the signal mark 1, decrypts the encrypted actual information 1 by using the decryption algorithm 1 to obtain a plaintext of the actual information, and determines whether to send alarm prompt information by matching the plaintext of the actual information with a preset actual information format; the laser transmitting end encrypts the actual information 2 by using an encryption algorithm 2, then transmits the encrypted actual information 2 and the laser signal of the signal mark 2 to the laser receiving end, after the laser receiving end receives the laser signal, the laser receiving end determines a decryption algorithm to be used as the decryption algorithm 2 according to the signal mark 2, decrypts the encrypted actual information 2 by using the decryption algorithm 2 to obtain a plaintext of the actual information, and determines whether to send alarm prompt information by matching the plaintext of the actual information with a preset actual information format.
It is necessary to supplement that if the laser signal received by the laser receiving end has no signal mark, an alarm prompt message is sent out.
(II) as shown in FIG. 3, the method mainly comprises:
301. the laser receiving end receives laser signals which carry actual information and signal marks and are sent by the plurality of laser transmitting ends.
Wherein, the signal mark can be represented by a device mark, and the laser receiving end side can be provided with an interference preventing device to prevent the mutual interference of a plurality of laser signals.
When different laser transmitting ends use different encryption algorithms to encrypt laser signals, in order to enable the laser receiving ends to determine which decryption algorithm to use to decrypt the corresponding laser signals, unencrypted equipment identifiers can be added into the laser signals to be transmitted to the laser receiving ends, so that the laser receiving ends can determine the decryption algorithms according to the equipment identifiers.
302. And the laser receiving end decrypts the laser signal according to a decryption algorithm corresponding to the encryption algorithm used by the laser transmitting end to encrypt the laser signal, so as to obtain a plaintext of the signal mark and a plaintext of the actual information.
After the laser receiving end receives the plurality of laser signals, the decryption algorithm can be used for decrypting the corresponding laser signals respectively to obtain a plurality of decrypted laser signals.
303. And when the number of the plaintexts of the signal marks is determined not to be equal to the number of the plurality of laser transmitting ends or the decrypted laser signals do not conform to the preset format, the laser receiving end sends the alarm prompt information.
When the laser receiving end determines that the number of the plaintexts of the signal marks is not equal to the number of the laser transmitting ends, the intruder is indicated to use other laser transmitting ends to transmit laser signals which do not use the signal marks, so that alarm prompt information needs to be sent out; when the laser signal obtained after the decryption by the laser receiving end does not conform to the preset format, the instruction shows that the intruder uses other laser transmitting ends to transmit the laser signal set by the intruder, so that the alarm prompt information needs to be sent. The preset format comprises a signal mark format, an actual information format and a format of the signal mark and the actual information.
Further, according to the above method embodiment, another embodiment of the present invention further provides an alarm device based on laser correlation technique, as shown in fig. 4, the device mainly includes: a receiving unit 41, a decryption unit 42, a judgment unit 43 and an alarm unit 44. Wherein the content of the first and second substances,
a receiving unit 41 for receiving a laser signal;
the decryption unit 42 is configured to decrypt the laser signal according to a decryption algorithm corresponding to an encryption algorithm used by the laser transmitting end to encrypt the laser signal, so as to obtain a decrypted laser signal;
a determining unit 43, configured to determine whether the decrypted laser signal conforms to a preset format;
and the alarm unit 44 is used for sending out alarm prompt information when the preset format is not met.
Optionally, the receiving unit 41 is configured to receive different laser signals emitted in a polling manner for the signal marks, where each laser signal carries actual information and a signal mark.
Optionally, as shown in fig. 5, the decryption unit 42 includes:
the first decryption module 421 is configured to, when the signal mark is not encrypted and the actual information is encrypted, decrypt the actual information according to a decryption algorithm corresponding to the signal mark to obtain a plaintext of the actual information, where different signal marks correspond to different decryption algorithms, and each decryption algorithm is matched with an encryption algorithm used when the laser emitting end encrypts the actual information;
the judgment unit 43 includes:
the first determining module 431 is configured to determine whether the plaintext of the actual information conforms to a preset actual information format.
Optionally, as shown in fig. 5, the decryption unit 42 includes:
a second decryption module 422, configured to, when the signal mark and the actual information are encrypted together, perform decryption processing on the laser signal according to a decryption algorithm corresponding to an encryption algorithm used by the laser transmitting end to encrypt the laser signal, so as to obtain a plaintext of the signal mark and a plaintext of the actual information;
the judgment unit 43 includes:
a second judging module 432, configured to judge whether the plaintext of the signal mark is the signal mark to be received this time, and judge whether the plaintext of the actual information conforms to a preset actual information format;
the alarm unit 44 is configured to send the alarm prompt message when the plaintext of the signal tag is not the signal tag to be received this time, or the plaintext of the actual message does not conform to the preset actual message format.
Optionally, as shown in fig. 5, the receiving unit 41 includes:
the first receiving module 411 is configured to receive different laser signals that are transmitted by one laser transmitting end in a polling manner for a signal mark, where each laser signal carries actual information and a signal mark;
the second receiving module 412 is configured to receive different laser signals that are transmitted by a plurality of laser transmitting terminals in a polling manner with respect to the signal mark, where each laser signal carries actual information and the signal mark.
Optionally, as shown in fig. 5, the receiving unit 41 includes:
a third receiving module 413, configured to receive laser signals carrying actual information and signal marks and sent by multiple laser transmitting ends concurrently;
the decryption unit 42 includes:
the third decryption module 423 is configured to decrypt the laser signal according to a decryption algorithm corresponding to an encryption algorithm used by the laser transmitting end to encrypt the laser signal, so as to obtain a plaintext of the signal mark and a plaintext of the actual information;
the alarm unit 44 is further configured to send the alarm prompt message when it is determined that the number of plaintext of the signal mark is not equal to the number of the plurality of laser emitting ends.
The alarm device based on the laser correlation technique provided by the embodiment of the invention can enable the laser transmitting end to transmit the laser signal encrypted by using the encryption algorithm to the laser receiving end, after the laser receiving end receives the laser signal, the laser signal is decrypted according to the decryption algorithm corresponding to the encryption algorithm, then whether the decrypted laser signal conforms to the preset format is judged, when the decrypted laser signal does not conform to the preset format, the alarm prompt information is sent, and the alarm prompt information is sent under the condition that the laser signal is not received, so that an intruder can be prevented from using another laser transmitting end to transmit the laser signal to the laser receiving end to cause intrusion detection failure.
Further, according to the above method embodiment, another embodiment of the present invention further provides a storage medium storing a plurality of instructions, the instructions being suitable for being loaded by a processor and executing the alarm method based on the laser correlation technique.
The instruction stored in the storage medium provided by the embodiment of the invention can enable the laser transmitting end to transmit the laser signal encrypted by using the encryption algorithm to the laser receiving end, after the laser receiving end receives the laser signal, the laser signal is decrypted according to the decryption algorithm corresponding to the encryption algorithm, then whether the decrypted laser signal conforms to the preset format is judged, when the decrypted laser signal does not conform to the preset format, the alarm prompt information is sent, and the alarm prompt information is sent under the condition that the laser signal is not received, so that an intruder can be prevented from using another laser transmitting end to transmit the laser signal to the laser receiving end to cause intrusion detection failure.
Further, according to the above method embodiment, another embodiment of the present invention further provides a laser receiving end, where the laser receiving end includes a storage medium and a processor;
the processor is suitable for realizing instructions;
the storage medium adapted to store a plurality of instructions;
the instructions are adapted to be loaded by the processor and to perform the laser correlation technique based alarm method as described above.
The laser receiving end provided by the embodiment of the invention can enable the laser transmitting end to transmit the laser signal encrypted by the encryption algorithm to the laser receiving end, after the laser receiving end receives the laser signal, the laser signal is decrypted according to the decryption algorithm corresponding to the encryption algorithm, then whether the decrypted laser signal conforms to the preset format is judged, when the decrypted laser signal does not conform to the preset format, the alarm prompt information is sent, and the alarm prompt information is sent under the condition that the laser signal is not received, so that an intruder can be prevented from using another laser transmitting end to transmit the laser signal to the laser receiving end to cause intrusion detection failure.
Further, according to the above method embodiment, another embodiment of the present invention further provides an alarm system based on a laser correlation technique, where the system includes a laser emitting end and a laser receiving end;
the laser transmitting end is used for encrypting the laser signal according to an encryption algorithm and transmitting the encrypted laser signal to the laser receiving end;
the laser receiving end is used for receiving laser signals; according to the decryption algorithm corresponding to the encryption algorithm, carrying out decryption processing on the received laser signal to obtain a decrypted laser signal; judging whether the decrypted laser signal conforms to a preset format or not; and if the preset format is not met, sending out alarm prompt information.
It should be added that other operations performed with respect to the laser emitting end and the laser receiving end can be referred to the embodiments shown in fig. 1 to 3.
The alarm system based on the laser correlation technique provided by the embodiment of the invention can enable the laser transmitting end to transmit the laser signal encrypted by using the encryption algorithm to the laser receiving end, after the laser receiving end receives the laser signal, the laser signal is decrypted according to the decryption algorithm corresponding to the encryption algorithm, then whether the decrypted laser signal conforms to the preset format is judged, when the decrypted laser signal does not conform to the preset format, the alarm prompt information is sent, and the alarm prompt information is sent under the condition that the laser signal is not received, so that an intruder can be prevented from using another laser transmitting end to transmit the laser signal to the laser receiving end to cause intrusion detection failure.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
It will be appreciated that the relevant features of the method, apparatus and system described above are referred to one another. In addition, "first", "second", and the like in the above embodiments are for distinguishing the embodiments, and do not represent merits of the embodiments.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The algorithms and displays presented herein are not inherently related to any particular computer, virtual machine, or other apparatus. Various general purpose systems may also be used with the teachings herein. The required structure for constructing such a system will be apparent from the description above. Moreover, the present invention is not directed to any particular programming language. It is appreciated that a variety of programming languages may be used to implement the teachings of the present invention as described herein, and any descriptions of specific languages are provided above to disclose the best mode of the invention.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.
The various component embodiments of the invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art will appreciate that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functions of some or all of the components of the alarm method, apparatus and system based on laser correlation techniques according to embodiments of the present invention. The present invention may also be embodied as apparatus or device programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein. Such programs implementing the present invention may be stored on computer-readable media or may be in the form of one or more signals. Such a signal may be downloaded from an internet website or provided on a carrier signal or in any other form.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
Claims (11)
1. An alarm method based on a laser correlation technology is characterized by comprising the following steps:
a laser receiving end receives a laser signal;
decrypting the laser signal according to a decryption algorithm corresponding to an encryption algorithm used by the laser transmitting end for encrypting the laser signal to obtain a decrypted laser signal;
judging whether the decrypted laser signal conforms to a preset format or not;
if the format is not in accordance with the preset format, sending out alarm prompt information;
the laser receiving end receives the laser signal and comprises:
the laser receiving end receives different laser signals transmitted in a polling mode aiming at the signal marks, each laser signal carries actual information and the signal marks, and different encryption and decryption algorithms are set aiming at the laser signals of the different signal marks.
2. The method according to claim 1, wherein when the signal mark is not encrypted and the actual information is encrypted, the decrypting the laser signal according to a decryption algorithm corresponding to an encryption algorithm used by the laser transmitter to encrypt the laser signal, and obtaining the decrypted laser signal comprises:
decrypting the actual information according to the decryption algorithm corresponding to the signal mark to obtain a plaintext of the actual information, wherein different signal marks correspond to different decryption algorithms, and each decryption algorithm is matched with an encryption algorithm used when the laser emitting end encrypts the actual information;
the judging whether the decrypted laser signal conforms to a preset format comprises:
and judging whether the plaintext of the actual information conforms to a preset actual information format.
3. The method of claim 1, wherein the laser receiving end receives different laser signals transmitted in a polling manner for signal marks, and each laser signal carries actual information and a signal mark, comprising:
the laser receiving end receives different laser signals which are transmitted by a laser transmitting end in a polling mode aiming at the signal marks, and each laser signal carries actual information and a signal mark;
or the laser receiving end receives different laser signals which are transmitted by a plurality of laser transmitting ends in a polling mode aiming at the signal marks, and each laser signal carries actual information and the signal marks.
4. The method of claim 1, wherein the receiving the laser signal by the laser receiving end comprises:
the laser receiving end receives laser signals which are sent by a plurality of laser transmitting ends and carry actual information and signal marks;
the decrypting processing of the laser signal according to the decryption algorithm corresponding to the encryption algorithm used by the laser transmitting end to encrypt the laser signal to obtain the decrypted laser signal comprises the following steps:
decrypting the laser signal according to a decryption algorithm corresponding to an encryption algorithm used by the laser transmitting end for encrypting the laser signal to obtain a plaintext of the signal mark and a plaintext of the actual information;
the method further comprises the following steps:
and when the number of the plain texts of the signal marks is determined to be not equal to the number of the plurality of laser emission ends, sending the alarm prompt information.
5. An alarm device based on laser correlation technique, characterized in that the device comprises:
a receiving unit for receiving a laser signal;
the decryption unit is used for decrypting the laser signal according to a decryption algorithm corresponding to an encryption algorithm used by the laser transmitting end for encrypting the laser signal to obtain a decrypted laser signal;
the judging unit is used for judging whether the decrypted laser signal conforms to a preset format or not;
the alarm unit is used for sending out alarm prompt information when the preset format is not met;
the receiving unit is used for receiving different laser signals transmitted in a polling mode aiming at the signal marks, each laser signal carries actual information and the signal marks, and different encryption and decryption algorithms are set aiming at the laser signals of the different signal marks.
6. The apparatus of claim 5, wherein the decryption unit comprises:
the first decryption module is used for decrypting the actual information according to a decryption algorithm corresponding to the signal mark when the signal mark is not encrypted and the actual information is encrypted to obtain a plaintext of the actual information, different signal marks correspond to different decryption algorithms, and each decryption algorithm is matched with an encryption algorithm used when the laser transmitting end encrypts the actual information;
the judging unit includes:
and the first judgment module is used for judging whether the plaintext of the actual information conforms to a preset actual information format.
7. The apparatus of claim 5, wherein the receiving unit comprises:
the first receiving module is used for receiving different laser signals which are transmitted by a laser transmitting end in a polling mode aiming at the signal marks, and each laser signal carries actual information and the signal marks;
and the second receiving module is used for receiving different laser signals which are transmitted by a plurality of laser transmitting ends in a polling mode aiming at the signal marks, and each laser signal carries actual information and the signal marks.
8. The apparatus of claim 5, wherein the receiving unit comprises:
the third receiving module is used for receiving laser signals which are sent by a plurality of laser transmitting ends and carry actual information and signal marks concurrently;
the decryption unit includes:
the third decryption module is used for decrypting the laser signal according to a decryption algorithm corresponding to an encryption algorithm used by the laser transmitting end for encrypting the laser signal to obtain a plaintext of the signal mark and a plaintext of the actual information;
and the alarm unit is also used for sending out the alarm prompt information when the number of the plain texts of the signal marks is determined to be not equal to the number of the plurality of laser emission ends.
9. A storage medium storing a plurality of instructions adapted to be loaded by a processor and to perform the method according to any one of claims 1 to 4.
10. A laser receiving end, comprising a storage medium and a processor;
the processor is suitable for realizing instructions;
the storage medium adapted to store a plurality of instructions;
the instructions are adapted to be loaded by the processor and to perform the method of alarming based on the laser correlation technique of any of claims 1-4.
11. An alarm system based on a laser correlation technique is characterized by comprising a laser transmitting end and a laser receiving end;
the laser transmitting end is used for encrypting the laser signal according to an encryption algorithm and transmitting the encrypted laser signal to the laser receiving end;
the laser receiving end is used for receiving laser signals; according to the decryption algorithm corresponding to the encryption algorithm, carrying out decryption processing on the received laser signal to obtain a decrypted laser signal; judging whether the decrypted laser signal conforms to a preset format or not; if the format is not in accordance with the preset format, sending out alarm prompt information;
the laser receiving end is specifically used for receiving different laser signals emitted in a polling mode aiming at the signal marks, each laser signal carries actual information and the signal marks, and different encryption and decryption algorithms are set aiming at the laser signals of the different signal marks.
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| CN102339517B (en) * | 2011-06-14 | 2014-02-05 | 上海理工大学 | Laser communication-based alarm detection method and system |
| CN103684587B (en) * | 2013-11-21 | 2016-06-29 | 华东师范大学 | A kind of channel wireless radio multi laser communication method based on DMD and device |
| CN107305724A (en) * | 2016-04-24 | 2017-10-31 | 广州晓谷川骐通信技术有限公司 | A kind of laser anti-theft method and laser anti-theft device |
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