CN102377571A - Method and system for implementing IEC104 message transmission - Google Patents
Method and system for implementing IEC104 message transmission Download PDFInfo
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- CN102377571A CN102377571A CN2011103611770A CN201110361177A CN102377571A CN 102377571 A CN102377571 A CN 102377571A CN 2011103611770 A CN2011103611770 A CN 2011103611770A CN 201110361177 A CN201110361177 A CN 201110361177A CN 102377571 A CN102377571 A CN 102377571A
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Abstract
The invention discloses a method and a system for implementing IEC104 message transmission. The method comprises the following steps of: S1, judging that a zone bit carried by the pre-transmitted IEC104 message is in a frame I, a frame U or a frame S, turning to S2 if the zone bit is in the frame I, and turning to S4 if the zone bit is in the frame U or the frame S; S2, encrypting an application service data unit of the frame I through a transmitting party by an error correcting code (ECC) algorithm; S3, decrypting the encrypted application service data unit to reduce the application service data unit of a clear text by a receiving party; and S4, authenticating the identity of the transmitting party of the pre-transmitted IEC104 message by digital signature. According to the frame format of the IEC104 message, the message is processed in a mode of combining the ECC encryption algorithm and the authentication with digital signature, so that the security problem of clear text transmission of the IEC104 message is solved, the reliability of message transmission is improved, and secure and stable operation of a power system is ensured.
Description
Technical field
The present invention relates to field of information transmission, relate in particular to a kind of method and system of the IEC104 of realization message transmissions.
Background technology
Along with the fast development of computer networking technology and power automation technology, the function of many regional dispatch automation system is very powerful, and the general various protocols of supporting of its message transmission control is especially supported IEC60870-5-104 agreement (being called for short the IEC104 agreement).The IEC104 agreement is as a kind of international standard protocol, has that real-time is good, reliability is high, data traffic is big, be convenient to advantages such as amount of information expansion, network enabled transmission, and its content and function have contained the definition of protection aspect.104 stipulations not only can be used between scheduling and the factory station; And can be applied to electric substation automation system inside fully; Existing 104 stipulations are applied in the middle of the electric substation automation system by a plurality of worlds well-known protection Automation Co., Ltd such as companies such as SIEMENS, GEELIN, and have obtained success.Development along with the electric power system Networks of Fiber Communications; Developed into the new stage that tentatively to build the power system information highway at State Grid's data network (SPDnet) of building; And 104 stipulations the current stage is sent to transformer station's real time information the effective carrier of this highway just; Ethernet interface is provided and supports remote terminal unit in the station of 104 stipulations; This remote terminal unit can directly insert the SPDnet edge switch, thereby real time information is sent to the user who is connected to SPDnet that all need this station information.
As everyone knows, IEC104 is as international standard protocol, and it is a plaintext transmission standard, and protecting information safety is relatively poor; And this agreement is relatively more open and standardization, and its threat under attack is also big more, and fail safe is also poor more; It with TCP as transport layer protocol; And just there is safety issue in ICP/IP protocol itself; Select deception like spoofed IP address, source routing; And ICP/IP protocol adopts plaintext transmission, will cause application's data to comprise that password, password etc. are disclosed on network, is easy to eavesdropped, forge and distort.It is thus clear that; The safe transmission of telecontrol information has become unavoidable practical problem; As power automatic system data source and the telecontrol information of implementing the control behavior; If, will bring serious threat, sometimes even cause catastrophic failure to the safe and stable operation of electric power system owing to the transmission safety reason causes malfunction, tripping, uploads the disorder of data etc.Therefore, guarantee that the telecontrol information safety of transmission will be very important.
Summary of the invention
The technical problem that the present invention will solve is; The defective that has hidden danger to prior art telecontrol information TRANSEC transmission security; A kind of method and system of the IEC104 of realization message transmissions is provided; This technical scheme has solved the safety issue of IEC104 message plaintext transmission, thereby has improved the reliability of message transmissions, ensures the operation of power system safety and stability.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of method that realizes the IEC104 message transmissions, said method comprising the steps of:
S1. judge according to the preparatory entrained flag bit of transmission IEC104 message whether it is that I frame message, U frame message still are S frame message, if I frame message, execution in step S2 then is if U frame message or S frame message then directly go to execution in step S4;
S2. transmit leg is encrypted through the ECC algorithm the application service data cell in the I frame message;
S3. the recipient deciphers the application service data cell after encrypting, to restore application service data cell expressly;
S4. the transmit leg to preparatory transmission IEC104 message carries out authentication through digital signature.
In method of the present invention, further comprising the steps of before the said step S1:
S0. receive the order that the user sends preparatory transmission IEC104 message.
In method of the present invention, said step S2 specifically may further comprise the steps:
S21. receive the order of transmit leg and the common elliptic curve of selecting
of recipient according to the ECC algorithm; Wherein, Elliptic curve
is to confirm that by equation
is positive integer;
S22. transmit leg with the application service data cell in the I frame message as cleartext information
; And this cleartext information encrypted through the ECC algorithm; To generate cipher-text information
; Wherein,
;
is recipient's public-key cryptography; And
;
is positive integer;
is positive integer, and
is positive integer.
In method of the present invention, said step S3 specifically may further comprise the steps:
S31. the recipient receives said cipher-text information
;
S32. through formula
said cipher-text information
is deciphered; To generate cleartext information
; Wherein,
,
.
In method of the present invention, said step S4 specifically may further comprise the steps:
S41. transmit leg generates first information summary through hash algorithm with said preparatory transmission IEC104 message, and according to its private key said first information summary is carried out digital signature;
S42. transmit leg is sent to the recipient with the said preparatory first information summary that transmits the IEC104 message and signed;
S43. the recipient generates second informative abstract through hash algorithm with the said preparatory transmission IEC104 message that is received, and according to the first information summary of having signed said second informative abstract is verified, with the identity information of acknowledged.
The present invention also constructs a kind of system of the IEC104 of realization message transmissions, and said system comprises successively the judge module that connects, encrypting module, deciphering module and the authentication module that is connected with said deciphering module with said judge module respectively, wherein,
Judge module is used for judging according to transmitting the entrained flag bit of IEC104 message in advance whether it is that I frame message, U frame message still are S frame message;
Encrypting module is used for transmit leg the application service data cell of I frame message is encrypted through the ECC algorithm;
Deciphering module is used for the recipient application service data cell of the I frame message after encrypting is deciphered, to restore application service data cell expressly;
Authentication module is used for the transmit leg of preparatory transmission IEC104 message is carried out authentication through digital signature.
In system of the present invention, said system comprises the receiver module that is connected with said judge module, wherein,
Receiver module is used to receive the order that the user sends preparatory transmission IEC104 message.
In system of the present invention, said encrypting module specifically comprises the selected cell and first generation unit that connects successively, wherein,
Selected cell; Be used for receiving the order of transmit leg and the common elliptic curve of selecting
of recipient according to the ECC algorithm; Wherein, Elliptic curve
is to confirm that by equation
is positive integer;
First generation unit; Be used for transmit leg with the application service data cell of I frame message as cleartext information
; And this cleartext information encrypted through the ECC algorithm; To generate cipher-text information
; Wherein,
;
is recipient's public-key cryptography; And
;
is positive integer;
is positive integer, and
is positive integer.
In system of the present invention, said deciphering module specifically comprises the receiving element and second generation unit that connects successively, wherein,
Receiving element is used for the recipient and receives said cipher-text information
;
Second generation unit; Be used for said cipher-text information
being deciphered through formula
; To generate cleartext information
; Wherein,
,
.
In system of the present invention, said authentication module specifically comprises signature unit, transmitting element and the confirmation unit that connects successively, wherein,
Signature unit is used for transmit leg and through hash algorithm said preparatory transmission IEC104 message is generated first information summary, and according to its private key said first information summary is carried out digital signature;
Transmitting element is used for transmit leg the said preparatory first information summary that transmits the IEC104 message and signed is sent to the recipient;
Confirmation unit is used for the recipient and through hash algorithm the said preparatory transmission IEC104 message that is received is generated second informative abstract, and according to the first information summary of having signed said second informative abstract is verified, with the identity information of acknowledged.
The technical scheme of embodiment of the present invention; Has following beneficial effect: according to the frame format of IEC104 message; Adopt the ECC AES respectively and carry out the mode that authentication combines through digital signature message is handled; Solve the safety issue of IEC104 message plaintext transmission, thereby improved the reliability of message transmissions, ensured the operation of power system safety and stability.
Description of drawings
To combine accompanying drawing and embodiment that the present invention is described further below, in the accompanying drawing:
Fig. 1 is the flow chart that the present invention realizes the method for IEC104 message transmissions;
Fig. 2 is the structural representation of I frame message of the present invention;
Fig. 3 is the flow chart that the present invention realizes step S2 in the method for IEC104 message transmissions;
Fig. 4 is the flow chart that the present invention realizes step S3 in the method for IEC104 message transmissions;
Fig. 5 is the flow chart that the present invention realizes step S4 in the method for IEC104 message transmissions;
Fig. 6 is the structural representation of the I frame message after the present invention encrypts;
Fig. 7 is the structural representation that the present invention realizes the system of IEC104 message transmissions.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Should be noted that according to the form of IEC104 message and can know that the IEC104 message comprises the message of I frame, U frame and three kinds of forms of S frame; Wherein, comprised ASDU (Application Service Date Unit, application service data cell) in the form of I frame message; And this part has comprised important telecontrol information, also receives extraneous attack the most easily, therefore; I frame message need be encrypted and the identity of message transmitting party is verified, owing to do not comprise ASDU in the form of S frame message and U frame message, when message sends, does not relate to necessary enciphered message; Only need the identity of message transmitting party to be verified in the present embodiment, transmit leg carries out authentication through digital signature; Those skilled in the art should understand; In other embodiment, also can carry out authentication through other mode, repeat no more at this.
See also Fig. 1, Fig. 1 is the flow chart that the present invention realizes the method for IEC104 message transmissions, and is as shown in Figure 1, said method comprising the steps of:
In step S0, receive the order that the user sends preparatory transmission IEC104 message.
In step S1, judge according to the entrained flag bit of preparatory transmission IEC104 message whether it is that I frame message, U frame message still are S frame message, if I frame message, execution in step S2 then is if U frame message or S frame message then directly go to execution in step S4.
Should be noted that the structure of I frame message is as shown in Figure 2 to the IEC101 agreement; In the present embodiment; The structure of this I frame message comprises startup character, ASDU length, 8 hytes 1 of control domain, 8 hytes 2 of control domain, 8 hytes 3 of control domain, 8 hytes 4 of control domain and ASDU expressly, what deserves to be mentioned is that this ASDU length is variable; Its maximum is 253, repeats no more here.
In step S2, transmit leg is encrypted through the ECC algorithm the application service data cell in the I frame message.
In step S3, the recipient deciphers the application service data cell after encrypting, to restore application service data cell expressly.
In step S4, the preparatory transmit leg that transmits the IEC104 message is carried out authentication through digital signature.
See also Fig. 3, Fig. 3 is the flow chart that the present invention realizes step S2 in the method for IEC104 message transmissions, and as shown in Figure 3, said step S2 specifically may further comprise the steps:
In step S21; Receive the order of transmit leg and the common elliptic curve of selecting
of recipient according to the ECC algorithm; Wherein, Elliptic curve
is to confirm that by equation
is positive integer.
In step S22; Transmit leg with the application service data cell in the I frame message as cleartext information
; And this cleartext information encrypted through the ECC algorithm; To generate cipher-text information
; Wherein,
;
is recipient's public-key cryptography; And
;
is positive integer;
is positive integer, and
is positive integer.
What deserves to be mentioned is that in the present embodiment, any 1 G is as transmit leg and recipient's common point on the selection elliptic curve, those skilled in the art should understand, and repeats no more here.
See also Fig. 4, Fig. 4 is the flow chart that the present invention realizes step S3 in the method for IEC104 message transmissions, and as shown in Figure 4, said step S3 specifically may further comprise the steps:
In step S31, the recipient receives said cipher-text information
.
In step S32; Through formula
said cipher-text information
is deciphered; To generate cleartext information
; Wherein,
,
.
See also Fig. 5, Fig. 5 is the flow chart that the present invention realizes step S4 in the method for IEC104 message transmissions, and as shown in Figure 5, said step S4 specifically may further comprise the steps:
In step S41, transmit leg generates first information summary through hash algorithm with said preparatory transmission IEC104 message, and according to its private key said first information summary is carried out digital signature, that is to say, implements the process that this step can be accomplished digital signature.
Should be noted that; To the IEC101 agreement; The structure of the I frame message after the encryption is as shown in Figure 6; In the present embodiment, the structure of the I frame message after the encryption comprises startup character, ASDU length, 8 hytes 1 of control domain, 8 hytes 2 of control domain, 8 hytes 3 of control domain, 8 hytes 4 of control domain, ASDU ciphertext and digital signature, repeats no more here.
In step S42, transmit leg is sent to the recipient with the said preparatory first information summary that transmits the IEC104 message and signed.
In step S43, the recipient generates second informative abstract through hash algorithm with the said preparatory transmission IEC104 message that is received, and according to the first information summary of having signed said second informative abstract is verified, with the identity information of acknowledged.Should be noted that; In this step; Whether what the mode that second informative abstract is verified adopted is the PKI of transmit leg, implement this step and be to be modified for the identity information of acknowledged, if be modified; Then transmit the IEC104 message in advance and received outside world, at this moment the user need take appropriate measures and save.
See also Fig. 7; Fig. 7 is the structural representation that the present invention realizes the system of IEC104 message transmissions; As shown in Figure 7; Said system comprises successively receiver module 0, the judge module 1 that connects, encrypting module 2, deciphering module 3 and the authentication module 4 that is connected with said deciphering module 3 with said judge module 1 respectively, wherein; Said encrypting module 2 specifically comprises the selected cell 21 and first generation unit 22 that connects successively; Said deciphering module 3 specifically comprises the receiving element 31 and second generation unit 32 that connects successively, and said authentication module 4 specifically comprises signature unit 41, transmitting element 42 and the confirmation unit 43 that connects successively, and following mask body is introduced the effect of various piece:
Judge module 1 is used for judging according to transmitting the entrained flag bit of IEC104 message in advance whether it is that I frame message, U frame message still are S frame message.
Encrypting module 2 is used for transmit leg the application service data cell of I frame message is encrypted through the ECC algorithm.
Selected cell 21; Be used for receiving the order of transmit leg and the common elliptic curve of selecting
of recipient according to the ECC algorithm; Wherein, Elliptic curve
is to confirm that by equation
is positive integer.
First generation unit 22; Be used for transmit leg with the application service data cell of I frame message as cleartext information
; And it is encrypted through the ECC algorithm; To generate cipher-text information
; Wherein,
;
is recipient's public-key cryptography; And
;
is positive integer;
is positive integer, and
is positive integer.
Deciphering module 3 is used for the recipient application service data cell after encrypting is deciphered, to restore application service data cell expressly.
Receiving element 31 is used for the recipient and receives said cipher-text information
.
Second generation unit 32; Be used for said cipher-text information
being deciphered through formula
; To generate cleartext information
; Wherein,
,
.
Authentication module 4 is used for the transmit leg of preparatory transmission IEC104 message is carried out authentication through digital signature.
Signature unit 41 is used for transmit leg and through hash algorithm said preparatory transmission IEC104 message is generated first information summary, and according to its private key said first information summary is carried out digital signature.
Transmitting element 42 is used for transmit leg the said preparatory first information summary that transmits the IEC104 message and signed is sent to the recipient.
Confirmation unit 43 is used for the recipient and through hash algorithm the said preparatory transmission IEC104 message that is received is generated second informative abstract, and according to the first information summary of having signed said second informative abstract is verified, with the identity information of acknowledged.
Compared to prior art; Frame format according to the IEC104 message; Adopt the ECC AES respectively and carry out the mode that authentication combines through digital signature message is handled; Solve the safety issue of IEC104 message plaintext transmission, thereby improved the reliability of message transmissions, ensured the safe and stable operation of electric power system.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the claim scope of the present invention.
Claims (10)
1. a method that realizes the IEC104 message transmissions is characterized in that, said method comprising the steps of:
S1. judge according to the preparatory entrained flag bit of transmission IEC104 message whether it is that I frame message, U frame message still are S frame message, if I frame message, execution in step S2 then is if U frame message or S frame message then directly go to execution in step S4;
S2. transmit leg is encrypted through the ECC algorithm the application service data cell in the I frame message;
S3. the recipient deciphers the application service data cell after encrypting, to restore application service data cell expressly;
S4. the transmit leg to preparatory transmission IEC104 message carries out authentication through digital signature.
2. method according to claim 1 is characterized in that, and is further comprising the steps of before the said step S1:
S0. receive the order that the user sends preparatory transmission IEC104 message.
3. method according to claim 2 is characterized in that, said step S2 specifically may further comprise the steps:
S21. receive the order of transmit leg and the common elliptic curve of selecting
of recipient according to the ECC algorithm; Wherein, Elliptic curve
is to confirm that by equation
is positive integer;
S22. transmit leg with the application service data cell in the I frame message as cleartext information
; And this cleartext information encrypted through the ECC algorithm; To generate cipher-text information
; Wherein,
;
is recipient's public-key cryptography; And
;
is positive integer;
is positive integer, and
is positive integer.
4. method according to claim 3 is characterized in that, said step S3 specifically may further comprise the steps:
S31. the recipient receives said cipher-text information
;
S32. through formula
said cipher-text information
is deciphered; To generate cleartext information
; Wherein,
,
.
5. method according to claim 4 is characterized in that, said step S4 specifically may further comprise the steps:
S41. transmit leg generates first information summary through hash algorithm with said preparatory transmission IEC104 message, and according to its private key said first information summary is carried out digital signature;
S42. transmit leg is sent to the recipient with the said preparatory first information summary that transmits the IEC104 message and signed;
S43. the recipient generates second informative abstract through hash algorithm with the said preparatory transmission IEC104 message that is received, and according to the first information summary of having signed said second informative abstract is verified, with the identity information of acknowledged.
6. a system that realizes the IEC104 message transmissions is characterized in that, said system comprises successively the judge module that connects, encrypting module, deciphering module and the authentication module that is connected with said deciphering module with said judge module respectively, wherein,
Judge module is used for judging according to transmitting the entrained flag bit of IEC104 message in advance whether it is that I frame message, U frame message still are S frame message;
Encrypting module is used for transmit leg the application service data cell of I frame message is encrypted through the ECC algorithm;
Deciphering module is used for the recipient application service data cell of the I frame message after encrypting is deciphered, to restore application service data cell expressly;
Authentication module is used for the transmit leg of preparatory transmission IEC104 message is carried out authentication through digital signature.
7. system according to claim 6 is characterized in that said system comprises the receiver module that is connected with said judge module, wherein,
Receiver module is used to receive the order that the user sends preparatory transmission IEC104 message.
8. system according to claim 7 is characterized in that, said encrypting module specifically comprises the selected cell and first generation unit that connects successively, wherein,
Selected cell; Be used for receiving the order of transmit leg and the common elliptic curve of selecting
of recipient according to the ECC algorithm; Wherein, Elliptic curve
is to confirm that by equation
is positive integer;
First generation unit; Be used for transmit leg with the application service data cell of I frame message as cleartext information
; And this cleartext information encrypted through the ECC algorithm; To generate cipher-text information
; Wherein,
;
is recipient's public-key cryptography; And
;
is positive integer;
is positive integer, and
is positive integer.
9. system according to claim 8 is characterized in that, said deciphering module specifically comprises the receiving element and second generation unit that connects successively, wherein,
Receiving element is used for the recipient and receives said cipher-text information
;
Second generation unit; Be used for said cipher-text information
being deciphered through formula
; To generate cleartext information
; Wherein,
,
.
10. system according to claim 9 is characterized in that, said authentication module specifically comprises signature unit, transmitting element and the confirmation unit that connects successively, wherein,
Signature unit is used for transmit leg and through hash algorithm said preparatory transmission IEC104 message is generated first information summary, and according to its private key said first information summary is carried out digital signature;
Transmitting element is used for transmit leg the said preparatory first information summary that transmits the IEC104 message and signed is sent to the recipient;
Confirmation unit is used for the recipient and through hash algorithm the said preparatory transmission IEC104 message that is received is generated second informative abstract, and according to the first information summary of having signed said second informative abstract is verified, with the identity information of acknowledged.
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| CN103107931B (en) * | 2012-12-05 | 2016-03-23 | 清华大学 | Based on unblock formula communication means and the system of IEC104 stipulations |
| CN103107931A (en) * | 2012-12-05 | 2013-05-15 | 清华大学 | Non-blocking type communication method and system based on international electrotechnical commission (IEC) 104 protocol |
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| CN103368791A (en) * | 2013-06-28 | 2013-10-23 | 吉林省电力有限公司长春供电公司 | Method for rapidly and automatically detecting IEC104 protocol message |
| CN103368791B (en) * | 2013-06-28 | 2016-08-10 | 吉林省电力有限公司长春供电公司 | A kind of IEC104 protocol massages fast automatic detecting method |
| CN103716163A (en) * | 2013-12-12 | 2014-04-09 | 华南理工大学 | SV message encryption and decryption method meeting IEC61850-9-2 (LE) standard |
| CN103716163B (en) * | 2013-12-12 | 2017-01-25 | 华南理工大学 | SV message encryption and decryption method meeting IEC61850-9-2 (LE) standard |
| CN103873461A (en) * | 2014-02-14 | 2014-06-18 | 中国南方电网有限责任公司 | IEC62351-based security interaction method for GOOSE message |
| CN103873461B (en) * | 2014-02-14 | 2015-09-23 | 中国南方电网有限责任公司 | Based on the safety interacting method of the GOOSE message of IEC62351 |
| CN104506500A (en) * | 2014-12-11 | 2015-04-08 | 广东电网有限责任公司电力科学研究院 | GOOSE message authentication method based on transformer substation |
| CN111385249A (en) * | 2018-12-28 | 2020-07-07 | 中国电力科学研究院有限公司 | Vulnerability detection method |
| CN110061962A (en) * | 2019-03-11 | 2019-07-26 | 视联动力信息技术股份有限公司 | A kind of method and apparatus of video stream data transmission |
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