CN107395579A - A kind of sampling of continuous optical signal and restoring method for photon fire wall - Google Patents
A kind of sampling of continuous optical signal and restoring method for photon fire wall Download PDFInfo
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- CN107395579A CN107395579A CN201710551954.5A CN201710551954A CN107395579A CN 107395579 A CN107395579 A CN 107395579A CN 201710551954 A CN201710551954 A CN 201710551954A CN 107395579 A CN107395579 A CN 107395579A
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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
- H04L63/02—Network architectures or network communication protocols for network security for separating internal from external traffic, e.g. firewalls
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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
- H04B10/70—Photonic quantum communication
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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
- H04L63/14—Network architectures or network communication protocols for network security for detecting or protecting against malicious traffic
- H04L63/1408—Network architectures or network communication protocols for network security for detecting or protecting against malicious traffic by monitoring network traffic
- H04L63/1416—Event detection, e.g. attack signature detection
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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
- H04L63/20—Network architectures or network communication protocols for network security for managing network security; network security policies in general
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Abstract
The invention provides a kind of continuous optical signal sampling for photon fire wall and restoring method.Sampling period Tc and sampling time Ts are determined according to the security configuration of photon fire wall first, continuous optical signal is divided into two parts by 1 × 2 fast optical switch by Tc and Ts, normal signal enters fiber delay line cache, sampled signal is divided, pattern match is sent into all the way, in secondary fiber delay line cache after another way power back-off.Normal signal and the sampled signal having been compensated for while 2 × 1 fast optical switchs of input, control module carries out safety operation judgement according to security strategy and pattern match result, if splicing sampled signal and normal signal without the fast optical switch of security threat 2 × 1, continuous optical signal is reduced；Otherwise it abandons sampled signal, exports normal signal.This law is performed intrusion detection just for part optical signals and security protection, simple to operate, suitable for using the optical-fiber network towards end to end connection pattern；Improve the efficiency and processing speed of photon fire wall.
Description
Technical field
The present invention relates to optical fiber telecommunications system optical-fiber network security fields, and in particular to a kind of for the continuous of photon fire wall
Optical signal samples and restoring method, realizes the intrusion detection and security protection of area of light.
Background technology
Optical-fiber network as the physical link layer in whole communication system, because of the closing of its transmission medium, solenoid isolation performance it is good,
The features such as bandwidth, fast transmission speed, optical-fiber network are traditionally considered to have higher security guarantee.Thus optical-fiber network exists
Transmission, exchange and management and control etc. research and design lack the concern and research to photosphere information security.Therefore existing light net
Network mainly considers transparent opening and interconnected the general topological network design for only considering to ensure network survivability, do not have when building
There is consideration to take the network security measures for ensureing information physical safety.Such as the intelligence of current ASON (ASON)
The technology such as control and management is not directed to the strick precaution to malice, concealed attack, is eavesdropped without Network Intrusion and defence is resisted
Ability.
But with the development and progress of the invasion in fiber optic communication, Eavesdropping and equipment, in recent years for optical-fiber network
Attack constantly exposes with destructive insident, allows it is seen that the very big hidden danger of optical-fiber network security presence.Passed in the light of high-capacity and high-speed rate
In defeated system, the information characteristics such as data encapsulation format and speed are constant predictable, and the attack such as invasion eavesdropping can cause largely
Corrupt data or leakage.Therefore, there is an urgent need to study optical-fiber network attack resistance technology.
The security strategy of optical-fiber network is mainly realized in electric layer at present, including electronic warfare, intruding detection system etc..Electric layer
Although attack resistance technology can effectively filter polytype interference and Network Intrusion signal, it is currently based on information off-line
The electronics attack resistance technology of processing is limited to the processing speed bottleneck of electronic system, can not meet more than 40Gbps high-speed light letter
Number Real-time security monitoring demand.With the continuous development of Fibre Optical Communication Technology, super 100Gbps all-optical information processing has turned into
The inexorable trend of future optical networks, it is not used to the actual time safety prison of the optical signal of such high speed completely in electric layer attack resistance technology
Survey.In addition, opto-electronic conversion cost in high speed electrical signals processing system is high, processing speed is slow and process bandwidth is small, these are lacked
Fall into and cause the intrusion detection of electric layer and Prevention-Security not to adapt to optical-fiber network high speed, Large Copacity, the optical signal transmission spy of low time delay
Sign, that is, the safety of high-speed optical signal can not be ensured by only relying on electric layer attack resistance technology.
Develop for this and directly carried out based on the information content, transmission mode, coded system, modulation format etc. in photosphere
The intrusion detection of different characteristic and Prevention-Security.Using the high-speed of all-optical information treatment technology, high energy efficiency advantage, with reference to photosphere
Security strategy, full light fire wall is realized, ensure the information security of all-optical network.
Current photon fire wall directly carries out optical-fiber network institute carrying information using all-optical pattern matching mechanisms in area of light
Identification and analysis, screen out hiding network intrusions and attack, and corresponding mean of defense is selected according to the security strategy set,
The intrusion detection and security protection of area of light are realized, there is the advantages of fast processing speed, efficiency high, big capacity.At present, in existing network
The optical-fiber network of deployment mainly uses connection-oriented transmission mode, such as SDH systems, OTN systems etc., and network manager needs thing
First the business each to reach establishes an end-toend lightpath, standby service transmission using the route and signaling protocol of control plane
Finish, control plane is dismantled this light path again, discharges the resource on node and link.
Because optical-fiber network transmission system first to establish end-toend lightpath, have to all light by photon fire wall in existing network
Signal performs intrusion detection, and seriously constrains the operating efficiency of photon fire wall.But there is presently no for continuous optical signal
How sampling and restoring method, realize intrusion detection of the photon fire wall to continuous optical signal and security protection turns into first gram
The problem of clothes.
The content of the invention
The purpose of the present invention is a kind of sampling of continuous optical signal and restoring method for photon fire wall of design, for face
To the optical-fiber network of connection, this method carries out periodic samples, and sampled signal is performed intrusion detection and security protection, photon are prevented fires
Wall performs intrusion detection without all optical signals in being connected to an end-toend lightpath, is greatly enhanced photon fire wall
Efficiency and processing speed.
A kind of sampling of continuous optical signal and restoring method for photon fire wall that the present invention designs, the photon fire prevention
Wall includes control module and Pattern Matching Module, and Pattern Matching Module storage sets the field related to Cyberthreat and attack,
The continuous optical signal that the present invention inputs enters 1 × 2 fast optical switch, and control module is by setting sampling period Tc and sampling time Ts
Control 1 × 2 fast optical switch operation samples to continuous optical signal, exports during sampling as normal signal, prolongs through optical fiber all the way
An input of 2 × 1 fast optical switchs is accessed after slow line, the another way output of 1 × 2 fast optical switch is sampled signal, is adopted
Sample signal access optical splitter carries out two-way light splitting, inputs the Pattern Matching Module of photon fire wall, another way access er-doped all the way
Fiber amplifier (EDFA) carries out power back-off, then another input of 2 × 1 fast optical switchs is accessed after secondary fibre delay line
End, Pattern Matching Module carry out pattern match detection to the sampled signal of the continuous optical signal of entrance and the field of storage, its
Matching result Access Control module, control module are carried out judging whether potential Cyberthreat and attacked according to the result of pattern
Hit, send safety operation control signal to 2 × 1 fast optical switchs.When not detecting any Cyberthreat in sampled signal
And attack, control module makes the splicing of 2 × 1 fast optical switchs progress sampled signal and normal signal, after reducing continuous optical signal
Output；When Pattern Matching Module detects the field to match in sampled signal, control module judges to hide in sampled signal
There are potential Cyberthreat and attack, control module makes 2 × 1 fast optical switchs abandon sampled signal, only exports normal signal.
Carrying out practically step is as follows：
Ith, sampling period Tc and sampling time Ts are determined
The control module of photon fire wall determines the sampling period Tc of 1 × 2 fast optical switch according to existing security configuration
With sampling time Ts, Ts≤Tc.Sampling period Tc and sampling time Ts determines the inspecting force for continuous optical signal, for latent
In the bigger business of security threat, the sampling period and relatively long sampling time of 1~10 shorter frame of use.
Sampling period Tc, depending on being sampled the speed and frame format of communication data, traffic rate is higher, frame length is shorter
Tc it is accordingly shorter, be Microsecond grade to nanosecond；Traffic rate is low, is loosened to Millisecond；Tc it is longer, it is necessary to optical fiber prolong
Slow line is longer.
Ts=(0.1~1) Tc, to improve detection efficiency, preferred version is Ts=(0.1~0.5) Tc.
IIth, continuous optical signal sampling
Control module operates 1 × 2 fast optical switch by the sampling period Tc and sampling time Ts of setting, makes it to continuous light
Signal is sampled, 1 × 2 fast optical switch output two ways of optical signals during sampling, be all the way time span be Ts, cycle Tc
Sampled signal, another way are normal signal, and remaining part is normal signal after taking out sampled signal in continuous optical signal.
IIIth, normal signal
An input of the normal signal through fiber delay line cache, thereafter 2 × 1 fast optical switchs of access.
Need to consume the regular hour because photon fire wall carries out sampled signal pattern match and safety detection, in order to
To reduce continuous optical signal, the present invention is delayed using fibre delay line to normal signal for splicing normal signal and sampled signal
Deposit, normal signal and sampled signal is entered 2 × 1 fast optical switchs simultaneously；
IVth, sampled signal
Sampled signal accesses an optical splitter and carries out two-way light splitting first, and sampled signal enters Pattern Matching Module all the way
Pattern match is carried out, another way sampled signal first carries out power back-off and enters back into secondary fiber delay line cache, accesses 2 × 1 afterwards
Another input of fast optical switch；
The Pattern Matching Module that a part of sampled signal is sent into photon fire wall by the optical splitter carries out pattern match, separately
The sampled signal of a part enters fibre delay line after carrying out power back-off, meets that the light for being sent into Pattern Matching Module is believed with preferential
The ratio of two parts light beam number is determined in the luminous power needed for pattern match.
Vth, pattern match
The Pattern Matching Module of photon fire wall is according to the field related to Cyberthreat and attack that it is stored to sampling
Signal carries out pattern match, when occurring the field to match in sampled signal, illustrates to be concealed with potential net in sampled signal
Network threatens and attack, and Pattern Matching Module transmits a signal to control module, and control module sends safety behaviour according to the result of matching
Make control signal to 2 × 1 fast optical switchs；
VIth, the reduction and safety operation of continuous optical signal
Normal signal and the sampled signal that has been compensated for while it is input to 2 × 1 fast optical switchs；
When not detecting any Cyberthreat and attack in sampled signal, control module makes 2 × 1 fast optical switchs enter
The splicing of row sampled signal and normal signal, exported after continuous optical signal reduction；
When Pattern Matching Module detects the field to match in sampled signal, control module judges hidden in sampled signal
Potential Cyberthreat and attack are kept, control module makes 2 × 1 fast optical switchs abandon sampled signal, only exports normal signal.
Compared with prior art, a kind of continuous optical signal sampling for photon fire wall of the present invention and restoring method has
Beneficial effect is：1st, to the periodic sampling and signals revivification of continuous optical signal, the intrusion detection just for part optical signals is realized
And security protection, it is simple to operate, suitable for using the optical-fiber network towards end to end connection pattern；2nd, without detecting whole light letters
Number, it is greatly enhanced the efficiency and processing speed of photon fire wall；3rd, optical network management person is by adjusting sampling period and sampling
Time, you can realize anti-for different service types, different safety class, the intrusion detection under different network environments and safety
Shield, it is not necessary to extra adjustment is carried out to photon fire wall.
Brief description of the drawings
Fig. 1 is that this continuous optical signal for being used for photon fire wall samples and the photon fire wall of restoring method embodiment is overall
Configuration diagram；
Fig. 2 is that this continuous optical signal for being used for photon fire wall samples and restoring method embodiment is for continuous optical signal
Sampling period and the temporal relationship schematic diagram in sampling time；
Fig. 3 is the sampling of continuous optical signal and the restoring method embodiment flow chart that this is used for photon fire wall.
Embodiment
This is used for the continuous optical signal sampling of photon fire wall and the photon fire wall overall architecture of restoring method embodiment
As shown in figure 1, solid arrow represents optical signal transmission direction in figure, dotted arrow represents control electric signal transmission direction.Input
Continuous optical signal SinInto 1 × 2 fast optical switch, control module is by setting sampling period Tc and sampling time Ts controls 1 × 2
Fast optical switch is operated to continuous optical signal SinSampled, exported all the way during sampling as normal signal, after fibre delay line
Access an input of 2 × 1 fast optical switchs；The another way output of 1 × 2 fast optical switch is sampled signal, sampled signal
Access optical splitter and carry out two-way light splitting, all the way the Pattern Matching Module of 50% light beam input photon fire wall, remaining is as another
Erbium-doped fiber amplifier (EDFA) is accessed all the way and carries out power back-off, then 2 × 1 fast optical switchs are accessed after secondary fibre delay line
Another input, Pattern Matching Module enters row mode to the sampled signal of the continuous optical signal of entrance and the field of storage
Matching detection, its matching result Access Control module, control module according to the result of pattern judge whether potentially
Cyberthreat and attack, safety operation control signal is sent to 2 × 1 fast optical switchs.
The program of the example method operating procedure is as shown in figure 3, solid arrow represents optical signal operation, dotted arrow table in figure
Show control electric signal operation.It is specific as follows：
Ith, sampling period Tc and sampling time Ts are determined
The control module of photon fire wall determines the sampling period Tc of 1 × 2 fast optical switch according to existing security configuration
With sampling time Ts.This example is directed to the temporal partitioning of continuous optical signal as shown in Fig. 2 for continuous optical signal, this example sampling week
Phase is the time of 10 Bit positions, and the sampling time is the time of 5 Bit positions, then the optical signal of preceding 5 Bit positions is believed as conventional
Number, the optical signal of rear 5 Bit positions is as sampled signal.
IIth, continuous optical signal sampling
Control module operates 1 × 2 fast optical switch by the sampling period Tc and sampling time Ts of setting, makes it to continuous light
Signal is sampled, 1 × 2 fast optical switch output two ways of optical signals during sampling, be all the way time span be Ts, cycle Tc
Sampled signal, another way are normal signal, and remaining part is normal signal after taking out sampled signal in continuous optical signal.
IIIth, normal signal
An input of the normal signal through fiber delay line cache, thereafter 2 × 1 fast optical switchs of access.
Normal signal and sampled signal enter 2 × 1 fast optical switchs simultaneously；
IVth, sampled signal
Sampled signal accesses an optical splitter and carries out two-way light splitting first, and sampled signal enters Pattern Matching Module all the way
Pattern match is carried out, another way sampled signal first carries out power back-off and enters back into secondary fiber delay line cache, accesses 2 × 1 afterwards
Another input of fast optical switch；
The ratio for two parts light beam that this example optical splitter separates is 95：5.
Vth, pattern match
The Pattern Matching Module of photon fire wall is according to the field related to Cyberthreat and attack that it is stored to sampling
Signal carries out pattern match, when occurring the field to match in sampled signal, illustrates to be concealed with potential net in sampled signal
Network threatens and attack, and Pattern Matching Module transmits a signal to control module, and control module sends safety behaviour according to the result of matching
Make control signal to 2 × 1 fast optical switchs；
VIth, the reduction and safety operation of continuous optical signal
Normal signal and the sampled signal that has been compensated for while it is input to 2 × 1 fast optical switchs；
When not detecting any Cyberthreat and attack in sampled signal, control module makes 2 × 1 fast optical switchs enter
The splicing of row sampled signal and normal signal, optical signal S is exported after continuous optical signal reductionout；
When Pattern Matching Module detects the field to match in sampled signal, control module judges hidden in sampled signal
Potential Cyberthreat and attack are kept, control module makes 2 × 1 fast optical switchs abandon sampled signal, and normal signal is as defeated
Optical signals Sout。
Above-described embodiment, only the purpose of the present invention, technical scheme and beneficial effect are further described specific
Individual example, the present invention are not limited to this.All any modifications made within the scope of disclosure of the invention, equivalent substitution, change
Enter, be all contained within protection scope of the present invention.
Claims (6)
1. a kind of sampling of continuous optical signal and restoring method, the photon fire wall for photon fire wall includes control module
And Pattern Matching Module, Pattern Matching Module storage set the field related to Cyberthreat and attack, it is characterised in that:
The continuous optical signal of input enters 1 × 2 fast optical switch, and control module is by setting sampling period Tc and sampling time Ts controls
System 1 × 2 fast optical switch operation samples to continuous optical signal, exports all the way during sampling as normal signal, through optical fiber delay
An input of 2 × 1 fast optical switchs is accessed after line, the another way output of 1 × 2 fast optical switch is sampled signal, sampling
Signal access optical splitter carries out two-way light splitting, inputs the Pattern Matching Module of photon fire wall, another way access er-doped light all the way
Fiber amplifier carries out power back-off, then another input of 2 × 1 fast optical switchs, pattern are accessed after secondary fibre delay line
Matching module carries out pattern match detection, its matching result to the sampled signal of the continuous optical signal of entrance and the field of storage
Access Control module, control module carry out judging whether potential Cyberthreat and attack according to the result of pattern, send
Safety operation control signal is to 2 × 1 fast optical switchs；When not detecting any Cyberthreat and attack in sampled signal,
Control module makes 2 × 1 fast optical switchs carry out the splicing of sampled signal and normal signal, is exported after reducing continuous optical signal；When
Pattern Matching Module detects the field to match in sampled signal, and control module judges to be concealed with sampled signal potentially
Cyberthreat and attack, control module make 2 × 1 fast optical switchs abandon sampled signal, only export normal signal.
2. the sampling of continuous optical signal and restoring method according to claim 1 for photon fire wall, it is characterised in that
Carrying out practically step is as follows：
Ith, sampling period Tc and sampling time Ts are determined
The control module of photon fire wall determines the sampling period Tc of 1 × 2 fast optical switch and adopted according to existing security configuration
Sample time Ts, Ts≤Tc；
IIth, continuous optical signal sampling
Control module operates 1 × 2 fast optical switch by the sampling period Tc and sampling time Ts of setting, makes it to continuous optical signal
Sampled, 1 × 2 fast optical switch output two ways of optical signals, is the sampling that time span is Ts, the cycle is Tc all the way during sampling
Signal, another way are normal signal, and remaining part is normal signal after taking out sampled signal in continuous optical signal；
IIIth, normal signal
An input of the normal signal through fiber delay line cache, thereafter 2 × 1 fast optical switchs of access；
IVth, sampled signal
Sampled signal accesses an optical splitter and carries out two-way light splitting first, and sampled signal is sent into Pattern Matching Module and carries out mould all the way
Formula matches, and another way sampled signal first carries out power back-off and enters back into secondary fiber delay line cache, afterwards, accesses 2 × 1 quick light
Another input of switch；
Vth, pattern match
The field related to Cyberthreat and attack that the Pattern Matching Module of photon fire wall stores according to it is to sampled signal
Pattern match is carried out, when occurring the field to match in sampled signal, illustrates to be concealed with potential network prestige in sampled signal
The side of body and attack, Pattern Matching Module transmit a signal to control module, and control module sends safety operation control according to the result of matching
Signal processed is to 2 × 1 fast optical switchs；
VIth, the reduction and safety operation of continuous optical signal
Normal signal and the sampled signal that has been compensated for while it is input to 2 × 1 fast optical switchs；
When not detecting any Cyberthreat and attack in sampled signal, control module makes 2 × 1 fast optical switchs be adopted
The splicing of sample signal and normal signal, exported after continuous optical signal reduction；
When Pattern Matching Module detects the field to match in sampled signal, control module judges to be concealed with sampled signal
Potential Cyberthreat and attack, control module make 2 × 1 fast optical switchs abandon sampled signal, only export normal signal.
3. the sampling of continuous optical signal and restoring method according to claim 2 for photon fire wall, it is characterised in that：
The sampling period Tc that the step I determines is 1~10 frame, for Microsecond grade to nanosecond.
4. the sampling of continuous optical signal and restoring method according to claim 3 for photon fire wall, it is characterised in that：
Sampling time Ts=(0.1~1) Tc that the step I determines.
5. the sampling of continuous optical signal and restoring method according to claim 3 for photon fire wall, it is characterised in that：
Sampling time Ts=(0.1~0.5) Tc that the step I determines.
6. the sampling of continuous optical signal and restoring method according to claim 2 for photon fire wall, it is characterised in that：
The Pattern Matching Module of a part of sampled signal feeding photon fire wall is entered row mode by optical splitter in the step IV
Match somebody with somebody, enter fiber delay line cache after the sampled signal progress power back-off of another part, meet to be sent into pattern match with preferential
The optical signal of module determines the ratio of two parts light beam in the luminous power needed for pattern match.
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| CN107395579B (en) | 2020-05-12 |
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