CN108123798A - Longitudinal difference protection cryptographic communication system and control method based on quantum key distribution - Google Patents
Longitudinal difference protection cryptographic communication system and control method based on quantum key distribution Download PDFInfo
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- CN108123798A CN108123798A CN201711280014.3A CN201711280014A CN108123798A CN 108123798 A CN108123798 A CN 108123798A CN 201711280014 A CN201711280014 A CN 201711280014A CN 108123798 A CN108123798 A CN 108123798A
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- automatically controlled
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- controlled optical
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
- H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
- H04L9/0852—Quantum cryptography
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
- H04B10/85—Protection from unauthorised access, e.g. eavesdrop protection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
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- Computer Security & Cryptography (AREA)
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- Computer Hardware Design (AREA)
- Computing Systems (AREA)
- General Engineering & Computer Science (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses a kind of longitudinal difference protection cryptographic communication systems and control method based on quantum key distribution; belong to Technique on Quantum Communication field, including quantum key distribution subsystem, automatically controlled optical logic operation element, electrooptic conversion module, photoelectric conversion module, longitudinal difference protection facility information transmitting terminal and receiving terminal；The transmitting terminal of longitudinal difference protection facility information is connected by the first automatically controlled optical logic operation element with electrooptic conversion module; the receiving terminal of longitudinal difference protection facility information is connected by the second automatically controlled optical logic operation element with photoelectric conversion module, and the output terminal of electrooptic conversion module is connected by fiber channel with photoelectric conversion module；First automatically controlled optical logic operation element and the second automatically controlled optical logic operation component passing quantity quantum key distribution subsystem connection.So that the communication information can not be eavesdropped and copied by attacker, so that the security of operation of power networks is further enhanced.
Description
Technical field
The present invention relates to Technique on Quantum Communication field, more particularly to a kind of longitudinal difference protection encryption based on quantum key distribution
Communication system and control method.
Background technology
The protected species of power grid are various, and technology is different, and a variety of protection types can be divided into according to different standards.But power grid
In most of protected modes by it is each protection equipment complete independently, no interactions communication requirement.Only differential protection is because of its principle
Logic judgment is carried out to the data that more than two relay sources are come, so there is interactive communication demand.And transverse differential protection and main transformer
The communication range of longitudinal difference protection is in station, and only pilot wire relays have station and interior communication, but circuit optical fiber longitudinal differential is protected
The communication information of equipment room is protected there is no any encryption measures, therefore information is easily ravesdropping and copys.
Quantum encryption communication as current safest coded communication mode, application system mainly with IPSec VPN skills
Art is engaged, and carries out encryption and decryption for IP data packets, effective technical solution is there is no at present for non-IP data.And circuit indulges difference
Protection equipment room communicates not by IP packet modes, therefore close using quantum in the communication of longitudinal difference protection equipment room
Key is encrypted, it is necessary to design a kind of new cryptographic communication system for the characteristics of pilot wire relays.
At present in power grid three kinds of communication modes of longitudinal difference protection equipment room as shown in Figure 1, in Fig. 1E1 digital electric signals
Switch to optical signal on electrooptic conversion module, delay requirement 5 ms direct-connected with the photoelectric conversion module of opposite equip. is known as optical fiber
Longitudinal differential protection, abbreviation optical-fiber longitudinal difference protection are the most reliable realization methods of most mainstream in route protection.In Fig. 1E1
The direct-connected SDH equipment E1 interfaces of digital electric signal are connected by SDH with opposite end SDH, then switch to the vertical poor equipment of E1 interfaces connection, when
Prolong requirement as 15 ms.In Fig. 164K analog electrical signals E1 interfaces are switched to by PCM, then be connected into SDH, pass through SDH and opposite end
It is connected, delay requirement is 15 ms.
But three kinds of communication modes of the longitudinal difference protection equipment room of power grid have a drawback in that at present：First, information is all
It is transmitted by fiber channel, the communication information does not have any encryption measures, and data bit rate is low and regular strong, is ravesdropping and copys
It is relatively easy to.Second is that using man-in-the-middle attack, line tripping can be caused, operation of power networks accident is caused, jeopardizes power grid security.
The content of the invention
It is an object of the invention to provide a kind of longitudinal difference protection cryptographic communication system based on quantum key distribution and controls
Method, to improve the security of operation of power networks.
In order to achieve the above object, in a first aspect, the present invention provides a kind of longitudinal difference protection encryption based on quantum key distribution
Communication system, including：
Quantum key distribution subsystem, automatically controlled optical logic operation element, electrooptic conversion module, photoelectric conversion module, longitudinal difference protection
The transmitting terminal and receiving terminal of facility information；
The transmitting terminal of longitudinal difference protection facility information is connected by the first automatically controlled optical logic operation element with electrooptic conversion module, and it is poor to indulge
The receiving terminal of protection facility information is connected by the second automatically controlled optical logic operation element with photoelectric conversion module, electrooptic conversion module
Output terminal be connected by fiber channel with photoelectric conversion module；
First automatically controlled optical logic operation element and the second automatically controlled optical logic operation component passing quantity quantum key distribution subsystem connection.
Wherein, quantum key distribution subsystem includes：First key management module, the second key management module, the first QKD
Equipment and the 2nd QKD equipment；
The receiving terminal of first key management module is connected with the output terminal of the first QKD equipment, output terminal and the first automatically controlled light logic
Arithmetic element connects；
The receiving terminal of second key management module is connected with the output terminal of the 2nd QKD equipment, output terminal and the second automatically controlled light logic
Arithmetic element connects；
First QKD equipment is connected with the 2nd QKD equipment.
Second aspect, the present invention provide a kind of controlling party of the longitudinal difference protection cryptographic communication system based on quantum key distribution
Method, including：
S1, longitudinal difference protection equipment transmitting terminal, quantum key distribution subsystem export electric signal, quantum key electric signal to respectively
One automatically controlled optical logic operation element；
The logic that S2, the first automatically controlled optical logic operation element carry out electric signal and quantum key electric signal and-or inverter combination is transported
It calculates, to information, directly encryption obtains information ciphertext in plain text；
Electrical signal information ciphertext is converted into optical signal information ciphertext, and is transmitted through the fiber to photoelectricity by S3, electrooptic conversion module
Modular converter；
Optical signal information ciphertext is converted to electrical signal information ciphertext and is transmitted to the second automatically controlled light logic by S4, photoelectric conversion module
Arithmetic element and quantum key distribution subsystem export quantum key electric signal to the second automatically controlled optical logic operation element；
S5, the second automatically controlled optical logic operation element are at the electrical signal information ciphertext and quantum key electric signal that receive
Reason, reversed computing obtain information in plain text.
Wherein, method further includes：
The quantum key distributed between first QKD equipment and the 2nd QKD equipment exports respectively in electrical signal form to first key
Management module and the second key management module are stored；
First key management module, the second key management module export quantum key electric signal to the first automatically controlled light logic fortune respectively
Calculate element, the second automatically controlled optical logic operation element.
Compared with prior art, there are following technique effects by the present invention：The present invention is in existing longitudinal difference protection equipment room
Quantum key distribution subsystem and automatically controlled optical logic operation element are added in communication system, so as to utilize quantum key pair
Longitudinal difference protection equipment room is encrypted using the information that non-IP modes communicate, and leads to the information for being easily ravesdropping and copying originally
It crosses and becomes safer encryption information with the progress logical operation of quantum key information, make the communication information that can not be eavesdropped by attacker
And imitation, so that the security of operation of power networks is further enhanced.
Description of the drawings
Below in conjunction with the accompanying drawings, the specific embodiment of the present invention is described in detail：
Fig. 1 is three kinds of communication mode structural representations of the existing longitudinal difference protection equipment room of power grid that background of invention part is addressed
Figure；
Fig. 2 is a kind of structural representation of the longitudinal difference protection cryptographic communication system based on quantum key distribution in one embodiment of the invention
Figure；
Fig. 3 is a kind of longitudinal difference protection cryptographic communication system control method based on quantum key distribution in one embodiment of the invention
Flow diagram.
Specific embodiment
In order to illustrate further the feature of the present invention, please refer to the following detailed descriptions related to the present invention and attached drawing.Institute
Attached drawing is only for reference and purposes of discussion, is not used for being any limitation as protection scope of the present invention.
As shown in Fig. 2, the present embodiment discloses a kind of longitudinal difference protection cryptographic communication system based on quantum key distribution, bag
It includes：
Quantum key distribution subsystem 10, the first automatically controlled optical logic operation element 20, the second automatically controlled optical logic operation element 30, electricity
Light modular converter 40, photoelectric conversion module 50, the transmitting terminal 60 of longitudinal difference protection facility information and receiving terminal 70；
The transmitting terminal 60 of longitudinal difference protection facility information is connected by the first automatically controlled optical logic operation element 20 with electrooptic conversion module 40
It connects, the receiving terminal 70 of longitudinal difference protection facility information is connected by the second automatically controlled optical logic operation element 30 with photoelectric conversion module 50
It connects, the output terminal of electrooptic conversion module 40 is connected by fiber channel with photoelectric conversion module 50；
First automatically controlled 20 and second automatically controlled optical logic operation element 30 of optical logic operation element passes through quantum key distribution subsystem
10 connections.
In Fig. 2, M websites are transmitting terminal, and N websites are receiving terminal.The system longitudinal difference protection equipment transmitting terminal is exported and received
End input signal be all electric signal, if longitudinal difference protection equipment directly export be electric signal if need not move through electro-optic conversion
Device.
Further, quantum key distribution subsystem 10 includes：First key management module 11, the second key management module
12nd, the first QKD equipment 13 and the 2nd QKD equipment 14；
The receiving terminal of first key management module 11 is connected with the output terminal of the first QKD equipment 13, output terminal and the first automatically controlled light
Logic arithmetic element connects；
The receiving terminal of second key management module 12 is connected with the output terminal of the 2nd QKD equipment 14, output terminal and the second automatically controlled light
Logic arithmetic element 30 connects；
First QKD equipment 13 is connected with the 2nd QKD equipment 14.
Wherein, the effect of first, second QKD equipment 13,14 is for distributing quantum key, utilizes the not true of quantum state
Qualitative, inseparability and polarizability ensure the security of the quantum key of distribution, so as to ensureing that encrypted information is peace
Complete.The effect of first, second quantum key management module 11,12 be for store and manage first, second QKD equipment 13,
The quantum key of 14 distributions, when needing that information is encrypted using quantum key, it is possible to from first, second quantum key
Quantum key is extracted in management module 13,14.
In practical applications, since the quantum key information of quantum key subsystem output is electric signal, so key is believed
It number can be directly entered in first, second automatically controlled optical logic operation element 20,30 and information carries out logical operation.
It should be noted that there are two automatically controlled optical logic operation elements, respectively positioned at the transmission of longitudinal difference protection facility information
End and receiving terminal.Transmitting terminal the first automatically controlled optical logic operation element by the electric signal of transmitting station institute output information and from
The quantum key electric signal of one quantum key management module extraction carries out the logical operation of and-or inverter combination, direct in plain text to information
Encryption, output information ciphertext；And in the electrical signal information ciphertext that will receive of the second automatically controlled optical logic operation element of receiving terminal
With the second quantum key electric signal as two inputs, reversely calculate information in plain text, give protection equipment, realize encryption and decryption.
Wherein, electrooptic conversion module also there are two, respectively positioned at the both ends of fiber channel.In the electricity of fiber channel input terminal
Light modular converter is that the cipher-text information of automatically controlled optical logic operation element output is become optical signal from electric signal, so that signal is in light
It is transmitted in fine channel；Photoelectric conversion module positioned at fiber channel output terminal is that the optical signal that will be exported in optical fiber is converted into telecommunications
Number, next to carry out automatically controlled light logic decryption to information ciphertext.
As shown in figure 3, the present embodiment correspondence discloses a kind of longitudinal difference protection coded communication system based on quantum key distribution
The control method of system, includes the following steps：
S1, longitudinal difference protection equipment transmitting terminal, quantum key distribution subsystem export electric signal, quantum key electric signal to respectively
One automatically controlled optical logic operation element；
The logic that S2, the first automatically controlled optical logic operation element carry out electric signal and quantum key electric signal and-or inverter combination is transported
It calculates, to information, directly encryption obtains information ciphertext in plain text；
Electrical signal information ciphertext is converted into optical signal information ciphertext, and is transmitted through the fiber to photoelectricity by S3, electrooptic conversion module
Modular converter；
Optical signal information ciphertext is converted to electrical signal information ciphertext and is transmitted to the second automatically controlled light logic by S4, photoelectric conversion module
Arithmetic element and quantum key distribution subsystem export quantum key electric signal to the second automatically controlled optical logic operation element；
S5, the second automatically controlled optical logic operation element are at the electrical signal information ciphertext and quantum key electric signal that receive
Reason, reversed computing obtain information in plain text.
Further, the method further includes：
The quantum key distributed between first QKD equipment and the 2nd QKD equipment exports respectively in electrical signal form to first key
Management module and the second key management module are stored；
First key management module, the second key management module export quantum key electric signal to the first automatically controlled light logic fortune respectively
Calculate element, the second automatically controlled optical logic operation element.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modifications, equivalent replacements and improvements are made should all be included in the protection scope of the present invention.
Claims (4)
1. a kind of longitudinal difference protection cryptographic communication system based on quantum key distribution, it is characterised in that：Including quantum key distribution
Subsystem, the first automatically controlled optical logic operation element, the second automatically controlled optical logic operation element, electrooptic conversion module, opto-electronic conversion mould
The transmitting terminal and receiving terminal of block, longitudinal difference protection facility information；
The transmitting terminal of longitudinal difference protection facility information is connected by the first automatically controlled optical logic operation element with electrooptic conversion module, and it is poor to indulge
The receiving terminal of protection facility information is connected by the second automatically controlled optical logic operation element with photoelectric conversion module, electrooptic conversion module
Output terminal be connected by fiber channel with photoelectric conversion module；
First automatically controlled optical logic operation element and the second automatically controlled optical logic operation component passing quantity quantum key distribution subsystem connection.
2. the system as claimed in claim 1, it is characterised in that：The quantum key distribution subsystem includes：First key
Management module, the second key management module, the first QKD equipment and the 2nd QKD equipment；
The receiving terminal of first key management module is connected with the output terminal of the first QKD equipment, output terminal and the first automatically controlled light logic
Arithmetic element connects；
The receiving terminal of second key management module is connected with the output terminal of the 2nd QKD equipment, output terminal and the second automatically controlled light logic
Arithmetic element connects；
First QKD equipment is connected with the 2nd QKD equipment.
3. a kind of controlling party of longitudinal difference protection cryptographic communication system based on quantum key distribution as described in claim 1 ~ 2
Method, which is characterized in that including：
S1, longitudinal difference protection equipment transmitting terminal, quantum key distribution subsystem export electric signal, quantum key electric signal to respectively
One automatically controlled optical logic operation element；
The logic that S2, the first automatically controlled optical logic operation element carry out electric signal and quantum key electric signal and-or inverter combination is transported
It calculates, to information, directly encryption obtains information ciphertext in plain text；
Electrical signal information ciphertext is converted into optical signal information ciphertext, and is transmitted through the fiber to photoelectricity by S3, electrooptic conversion module
Modular converter；
Optical signal information ciphertext is converted to electrical signal information ciphertext and is transmitted to the second automatically controlled light logic by S4, photoelectric conversion module
Arithmetic element and quantum key distribution subsystem export quantum key electric signal to the second automatically controlled optical logic operation element；
S5, the second automatically controlled optical logic operation element are at the electrical signal information ciphertext and quantum key electric signal that receive
Reason, reversed computing obtain information in plain text.
4. method as claimed in claim 3, which is characterized in that the method further includes：
The quantum key distributed between first QKD equipment and the 2nd QKD equipment exports respectively in electrical signal form to first key
Management module and the second key management module are stored；
First key management module, the second key management module export quantum key electric signal to the first automatically controlled light logic fortune respectively
Calculate element, the second automatically controlled optical logic operation element.
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| CN201711280014.3A CN108123798A (en) | 2017-12-06 | 2017-12-06 | Longitudinal difference protection cryptographic communication system and control method based on quantum key distribution |
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Application publication date: 20180605 |
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