CN102316107A - Method for IEC104 protocol message transmission and system - Google Patents
Method for IEC104 protocol message transmission and system Download PDFInfo
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- CN102316107A CN102316107A CN201110265131A CN201110265131A CN102316107A CN 102316107 A CN102316107 A CN 102316107A CN 201110265131 A CN201110265131 A CN 201110265131A CN 201110265131 A CN201110265131 A CN 201110265131A CN 102316107 A CN102316107 A CN 102316107A
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Abstract
The invention discloses a method for IEC104 protocol message transmission and a system. The method comprises the following steps of: 1) receiving a control message issued by a main power distribution station and/or a power distribution terminal; 2) encrypting the control domain of the control message through an encryption algorithm and sequentially combining pre-transmitted messages carried with security tags according to IEC104 protocols; and 3) decrypting the signed digests of the pre-transmitted messages according to a decryption algorithm and verifying the security of the pre-transmitted messages according to the decrypted signed digests. By encrypting the control domain of the control message according to the IEC104 protocols to combine the pre-transmitted messages carried with the security tags and decrypting the decrypted control domain to verify the security of the pre-transmitted messages, on the premise that the safety transmission of IEC104 protocol messages is ensured, the construction cost of a power distribution automation system is greatly reduced, and the overall lifecycle of the automation system is improved.
Description
Technical field
The present invention relates to information security field, relate in particular to a kind of method and system of IEC104 protocol massages transmission.
Background technology
Transfer (2011) No. 168 files " about strengthening the notice of distribution automation system security protection work " (hereinafter to be referred as " security protection notice ") and " low and medium voltage distribution network automated system security protection supplementary provisions (trying) " (hereinafter to be referred as " security protection supplementary provisions ") according to national grid, national grid requires main website and each terminal producer to descending control command and parameter setting instruction message, utilizes the method for mentioning in " security protection supplementary provisions "; Prolongation stabs and signature digest; Wherein, the scheduling certificate format that the main website PKI is adopted is followed X.509 standard, and distribution terminal equipment is through the PKI of preset main website issue; Thereby signature digest is deciphered; And the proving time stab, with the validity of the protocol massages that settles the standard, be example with the IEC104 protocol massages among the present invention; Its form is as shown in table 1; This form comprises IEC104 protocol massages, timestamp and signature digest, and wherein, signature digest adopts ECC (Elliptic Curves Cryptography; Elliptic curve cipher coding theory) algorithm or RSA Algorithm; Generally speaking, the ECC algorithm is primarily aimed at 160 signature digest, and RSA Algorithm is primarily aimed at the signature digest of 1024bit.
Table 1
| The IEC104 protocol massages | Timestamp | Signature digest |
Can know according to the test statistics result of official; If will accomplish the encryption and decryption process of an IEC104 protocol massages; The CPU processing time that needs lot of consumption distribution main website or distribution terminal; Particularly carry out the batch remote control or when in batches parameter was provided with, light was accomplished the encryption and decryption process to the IEC104 protocol massages, the CPU processing time of consumption will be more unimaginable; In addition, can satisfy normal monitoring needs in order to make distribution main website or distribution terminal, enterprise will have to purchase more high performance server; Particularly for the terminal; It might revise its hardware configuration design, like this in order to use more high performance process chip; With the manufacturing cost that improves distribution main website or distribution terminal greatly, thus the construction cost of raising electrical power distribution automatization system.
Further, in the electrical network to the specific (special) requirements of fail safe, in distribution system, accomplish signature digest through the rivest, shamir, adelman that adopts high degree of safety; For example, ECC (Elliptic Curves Cryptography, elliptic curve cipher coding theory) algorithm; But; The time complexity of rivest, shamir, adelman is all very high, so, press for the method that can reduce the construction cost of electrical power distribution automatization system when providing a kind of IEC104 of satisfying safety of protocol message to transmit again.
Summary of the invention
The technical problem that the present invention will solve is; To the electrical power distribution automatization system construction cost height and the high defective of encryption and decryption time complexity of prior art, reduce the method and system of the IEC104 protocol massages transmission of electrical power distribution automatization system construction cost when providing a kind of IEC104 of assurance safety of protocol message to transmit greatly.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of method of IEC104 protocol massages transmission, said method comprising the steps of:
S1. receive the control message that distribution main website and/or distribution terminal issue, wherein, said control message is the I frame message that carries control command;
S2. through AES the control domain of said control message is encrypted, and according to the preparatory message transmission of IEC104 agreement sequential combination label safe to carry;
S3. through decipherment algorithm the signature digest of said preparatory message transmission is deciphered, and according to the fail safe of the said preparatory message transmission of signature digest verification after the deciphering.
In the method for IEC104 protocol massages transmission of the present invention, further comprising the steps of before the said step S1:
S0. obtain AES that carries encrypted public key and the decipherment algorithm that carries decrypted private key.
In the method for IEC104 protocol massages transmission of the present invention, said preparatory message transmission comprises that message starts character, control message length L1, control message, message ending character, signature message length L2, control bit C, reserved place S, timestamp, safety label and signature digest.
In the method for IEC104 protocol massages transmission of the present invention, said step S2 specifically may further comprise the steps:
A1. calculate the byte length of said control message, and it is saved to control message length L1;
B1. through AES the control domain of said control message is encrypted;
C1. the control domain after will encrypting is saved to signature digest;
D1. calculate the byte length of said signature digest, and it is saved to signature message length L2;
E1. respectively to control bit C and reserved place S assignment;
F1. obtain the current time of system, and give timestamp its assignment;
G1. to the safety label assignment;
H1. according to the IEC104 agreement message is started the preparatory message transmission of character, control message length L1, control message, message ending character, signature message identification, signature message length L2, control bit C, reserved place S, timestamp, safety label and the synthetic label safe to carry of signature digest der group.
In the method for IEC104 protocol massages transmission of the present invention, said step S3 specifically may further comprise the steps:
A2. the content of second of the said preparatory message transmission of intercepting byte and the 3rd byte, and it is saved to control message length L1, wherein, the byte length of said preparatory message transmission is L, L=L1+L2+28;
B2. the content between L1+8 byte to the L1+11 byte of the said preparatory message transmission of intercepting, and it is saved to timestamp;
C2. obtain the current time of system, and whether the difference of judging this current time and timestamp is less than predetermined interval, if, execution in step D2 then, if not, then said preparatory message transmission transmission is overtime, and step finishes;
D2. the content of the 6th of the said preparatory message transmission of intercepting the 9 bytes of byte to the is to obtain control domain;
E2. the content of L1+6 byte of intercepting, and it is saved to signature message length L2;
F2. the content between L1+29 byte to the L1+L2+28 byte of intercepting, and it is saved to signature digest;
G2. through decipherment algorithm said signature digest is deciphered;
H2. judge whether the signature digest after the deciphering equates with the control domain that is obtained, if then said preparatory message transmission belongs to safe transmission, execution in step I2, if not, and then said preparatory message transmission error of transmission, step finishes;
I2. the content between the 4th of the said preparatory message transmission of intercepting the byte to the L1+3 byte, then the content of institute's intercepting is control message itself.
In the method for IEC104 protocol massages transmission of the present invention, carry out encryption and decryption through the ECC algorithm.
The present invention has also constructed a kind of IEC104 protocol massages system for transmitting, and said system comprises receiving element, assembled unit and the verification unit that connects successively, wherein,
Receiving element is used to receive the control message that distribution main website and/or distribution terminal issue, and wherein, said control message is the I frame message that carries control command;
Assembled unit is used for through AES the control domain of said control message being encrypted, and according to the preparatory message transmission of IEC104 agreement sequential combination label safe to carry;
Verification unit is used for through decipherment algorithm the signature digest of said preparatory message transmission being deciphered, and according to the fail safe of the said preparatory message transmission of signature digest verification after the deciphering.
In IEC104 protocol massages system for transmitting of the present invention, said system also comprises and is connected and is used to obtain AES that carries encrypted public key and the acquiring unit that carries the decipherment algorithm of decrypted private key with said receiving element.
In IEC104 protocol massages system for transmitting of the present invention, said preparatory message transmission comprises that message starts character, control message length L1, control message, message ending character, signature message identification, signature message length L2, control bit C, reserved place S, timestamp, safety label and signature digest.
In IEC104 protocol massages system for transmitting of the present invention,
Carry out encryption and decryption through the ECC algorithm.
The technical scheme of embodiment of the present invention; Has following beneficial effect: through the control domain of control message is encrypted, making up the preparatory message transmission of label safe to carry, and the control domain after encrypting deciphered according to the IEC104 agreement; Fail safe with the preparatory message transmission of verification; Thereby under the prerequisite that guarantees the transmission of IEC104 safety of protocol message, greatly reduce the construction cost of electrical power distribution automatization system, and improved the overall life cycle of automated system.
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 of the method embodiment one of IEC104 protocol massages transmission of the present invention;
Fig. 2 is the structural representation of control message in the method for IEC104 protocol massages of the present invention transmission;
Fig. 3 is the control domain structural representation of control message in the method for IEC104 protocol massages of the present invention transmission;
Fig. 4 is the flow chart of step S2 embodiment two in the method for IEC104 protocol massages of the present invention transmission;
Fig. 5 is the flow chart of step S3 embodiment three in the method for IEC104 protocol massages of the present invention transmission;
Fig. 6 is the structural representation of IEC104 protocol massages system for transmitting of the present invention.
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 in various embodiment of the present invention the IEC104 protocol massages comprises that message starts character, control message length L1, control message, message ending character, signature message identification, signature message length L2, control bit C, reserved place S, timestamp, safety label and signature digest; Wherein, message starts character and takies 1 byte, and control message length L1 takies 2 bytes; The control message takies L1 byte, and message ending character takies 1 byte, and the signature message identification takies 1 byte; Signature message length L2 takies 1 byte, and control bit C takies 1 byte, and reserved place S takies a byte; Timestamp takies 4 bytes, and safety label takies 16 bytes and signature digest takies L2 byte, in the present invention; The value that message starts character is 68H, and the value of message ending character is 16H, and the value of signature message identification is 16H; The particular content of the form of this IEC104 protocol massages is as shown in table 2, and those skilled in the art should understand, and repeats no more here.
Table 2
| 68 | L1 | The control message | 16 | 16 | L2 | C | S | Timestamp | Safety label | Signature digest |
See also Fig. 1, Fig. 1 is the flow chart of the method embodiment one of IEC104 protocol massages transmission of the present invention, and is as shown in Figure 1, said method comprising the steps of:
In step S0, obtain AES that carries encrypted public key and the decipherment algorithm that carries decrypted private key, should be noted that AES and the decipherment algorithm in this step is to mate automatically according to the execution of order.
In step S1, receive the control message that distribution main website and/or distribution terminal issue, wherein, said control message is the I frame message that carries control command.
What deserves to be mentioned is that to the IEC104 agreement, the structure of this control message is as shown in Figure 2; In the present embodiment; The structure of this control message comprises the ASDU (Application Service Date Unit, application service data cell) that starts character, APDU (Application Protocol Date Unit, Application Protocol Data Unit) length, eight hytes 1 of control domain, eight hytes 2 of control domain, eight hytes 3 of control domain, eight hytes 4 of control domain and IEC104 definition; Wherein, The value that starts character is 68H, takies a byte, and the maximum of APDU length is 253H; Take 1 byte; Eight hytes 1 of control domain, eight hytes 2 of control domain, eight hytes 3 of control domain and eight hytes 4 of control domain respectively take 1 byte, and the byte number of the ASDU of IEC104 definition is variable, and those skilled in the art should understand.
In step S2, through AES the control domain of said control message is encrypted, and according to the preparatory message transmission of IEC104 agreement sequential combination label safe to carry.
The structure of control domain that should be noted that this control message is as shown in Figure 3, for the IEC104 agreement; The control domain of control message since receive sequence number with transmit Sequence Number different, so its control domain is same scarcely, in the present embodiment; This control domain only takies 4 bytes; The technical scheme of embodiment of the present invention is only encrypted this control domain, when satisfying the uniqueness of ciphertext, has significantly reduced the time of encrypting.
In step S3, through decipherment algorithm the signature digest of said preparatory message transmission is deciphered, and according to the fail safe of the said preparatory message transmission of signature digest verification after the deciphering; Should be noted that; In step S2, significantly reduce the encryption time, conversely, also significantly reduced the deciphering time; Those skilled in the art should understand, and repeats no more here.
Please refer to Fig. 4, Fig. 4 is the flow chart of step S2 embodiment two in the method for IEC104 protocol massages of the present invention transmission, and as shown in Figure 4, said step S2 specifically may further comprise the steps:
In steps A 1, calculate the byte length of said control message, and it is saved to control message length L1.
In step B1, through AES the control domain of said control message is encrypted, should be noted that when carrying out this step, mate the AES that adapts with it automatically.
In step C1, the control domain after encrypting is saved to signature digest, that is to say that this signature digest is the control domain after encrypting.
In step D1, calculate the byte length of said signature digest, and it is saved to signature message length L2.
In step e 1, respectively to control bit C and reserved place S assignment, in the present embodiment, the value of control bit C and reserved place S all is 0x00H.
In step F 1, obtain the current time of system, and give timestamp its assignment.
In step G1, to the safety label assignment, in the present embodiment, the value of safety label is 0x00000000000000000000000000000000H.
In step H1, message is started the preparatory message transmission of character, control message length L1, control message, message ending character, signature message identification, signature message length L2, control bit C, reserved place S, timestamp, safety label and the synthetic label safe to carry of signature digest der group according to the IEC104 agreement.
Please refer to Fig. 5, Fig. 5 is the flow chart of step S3 embodiment three in the method for IEC104 protocol massages of the present invention transmission, and as shown in Figure 5, said step S3 specifically may further comprise the steps:
In steps A 2, second byte of the said preparatory message transmission of intercepting and the content of the 3rd byte, and it is saved to control message length L1, wherein, the byte length of said preparatory message transmission is L, L=L1+L2+28.
In step B2, the content between L1+8 byte to the L1+11 byte of the said preparatory message transmission of intercepting, and it is saved to timestamp.
In step C2, obtain the current time of system, and whether the difference of judging this current time and timestamp is less than predetermined interval, if; Execution in step D2 then, if not, then said preparatory message transmission transmission is overtime; Step finishes, and should be noted that this predetermined interval can be definite voluntarily according to user's demand; Predetermined interval generally is accurate to second, and in the present embodiment, this predetermined interval is 7 seconds.
In step D2, the content of 9 bytes of the 6th byte to the of the said preparatory message transmission of intercepting is to obtain control domain.
In step e 2, the content of L1+6 byte of intercepting, and it is saved to signature message length L2.
In step F 2, the content between L1+29 byte to the L1+L2+28 byte of intercepting, and it is saved to signature digest.
In step G2, through decipherment algorithm said signature digest is deciphered, should be noted that when carrying out this step, mate the decipherment algorithm that adapts with it automatically.
In step H2, judge whether the signature digest after the deciphering equates with the control domain that is obtained, if then said preparatory message transmission belongs to safe transmission, execution in step I2, if not, and then said message transmissions mistake, step finishes.
In step I2, the content between the 4th byte to the L1+3 byte of the said preparatory message transmission of intercepting, then the content of institute's intercepting is control message itself.
Preferably, carry out encryption and decryption, should be noted that through the ECC algorithm; Can also carry out encryption and decryption through RSA Algorithm; In this example, PKI that AES uses and certificate are EccSite.pem, and the private key that AES uses is EccSite.key; Those skilled in the art should understand, and repeats no more here.
Please refer to Fig. 6, Fig. 6 is the structural representation of IEC104 protocol massages system for transmitting of the present invention, and is as shown in Figure 6, and said system comprises acquiring unit 1, receiving element 2, assembled unit 3 and the verification unit 4 that connects successively, wherein,
Acquiring unit 1 is used to obtain AES that carries encrypted public key and the decipherment algorithm that carries decrypted private key.
Receiving element 2 is used to receive the control message that distribution main website and/or distribution terminal issue, and wherein, said control message is the I frame message that carries control command.
Should be noted that compared to prior art, according to the IEC104 agreement through to control message control domain encrypt; To make up the preparatory message transmission of label safe to carry; And the control domain after encrypting deciphered, with the fail safe of the preparatory message transmission of verification, thereby under the prerequisite that guarantees the transmission of IEC104 safety of protocol message; Greatly reduce the construction cost of electrical power distribution automatization system, and improved the overall life cycle of automated 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. the method for an IEC104 protocol massages transmission is characterized in that, said method comprising the steps of:
S1. receive the control message that distribution main website and/or distribution terminal issue, wherein, said control message is the I frame message that carries control command;
S2. through AES the control domain of said control message is encrypted, and according to the preparatory message transmission of IEC104 agreement sequential combination label safe to carry;
S3. through decipherment algorithm the signature digest of said preparatory message transmission is deciphered, and according to the fail safe of the said preparatory message transmission of signature digest verification after the deciphering.
2. the method for IEC104 protocol massages transmission according to claim 1 is characterized in that, and is further comprising the steps of before the said step S1:
S0. obtain AES that carries encrypted public key and the decipherment algorithm that carries decrypted private key.
3. the method for IEC104 protocol massages transmission according to claim 2; It is characterized in that said preparatory message transmission comprises that message starts character, control message length L1, control message, message ending character, signature message length L2, control bit C, reserved place S, timestamp, safety label and signature digest.
4. the method for IEC104 protocol massages transmission according to claim 3 is characterized in that said step S2 specifically may further comprise the steps:
A1. calculate the byte length of said control message, and it is saved to control message length L1;
B1. through AES the control domain of said control message is encrypted;
C1. the control domain after will encrypting is saved to signature digest;
D1. calculate the byte length of said signature digest, and it is saved to signature message length L2;
E1. respectively to control bit C and reserved place S assignment;
F1. obtain the current time of system, and give timestamp its assignment;
G1. to the safety label assignment;
H1. according to the IEC104 agreement message is started the preparatory message transmission of character, control message length L1, control message, message ending character, signature message identification, signature message length L2, control bit C, reserved place S, timestamp, safety label and the synthetic label safe to carry of signature digest der group.
5. the method for IEC104 protocol massages transmission according to claim 4 is characterized in that said step S3 specifically may further comprise the steps:
A2. the content of second of the said preparatory message transmission of intercepting byte and the 3rd byte, and it is saved to control message length L1, wherein, the byte length of said preparatory message transmission is L, L=L1+L2+28;
B2. the content between L1+8 byte to the L1+11 byte of the said preparatory message transmission of intercepting, and it is saved to timestamp;
C2. obtain the current time of system, and whether the difference of judging this current time and timestamp is less than predetermined interval, if, execution in step D2 then, if not, then said preparatory message transmission transmission is overtime, and step finishes;
D2. the content of the 6th of the said preparatory message transmission of intercepting the 9 bytes of byte to the is to obtain control domain;
E2. the content of L1+6 byte of intercepting, and it is saved to signature message length L2;
F2. the content between L1+29 byte to the L1+L2+28 byte of intercepting, and it is saved to signature digest;
G2. through decipherment algorithm said signature digest is deciphered;
H2. judge whether the signature digest after the deciphering equates with the control domain that is obtained, if then said preparatory message transmission belongs to safe transmission, execution in step I2, if not, and then said preparatory message transmission error of transmission, step finishes;
I2. the content between the 4th of the said preparatory message transmission of intercepting the byte to the L1+3 byte, then the content of institute's intercepting is control message itself.
6. according to the method for any described IEC104 protocol massages transmission of claim 1-5, it is characterized in that, carry out encryption and decryption through the ECC algorithm.
7. an IEC104 protocol massages system for transmitting is characterized in that, said system comprises receiving element, assembled unit and the verification unit that connects successively, wherein,
Receiving element is used to receive the control message that distribution main website and/or distribution terminal issue, and wherein, said control message is the I frame message that carries control command;
Assembled unit is used for through AES the control domain of said control message being encrypted, and according to the preparatory message transmission of IEC104 agreement sequential combination label safe to carry;
Verification unit is used for through decipherment algorithm the signature digest of said preparatory message transmission being deciphered, and according to the fail safe of the said preparatory message transmission of signature digest verification after the deciphering.
8. IEC104 protocol massages system for transmitting according to claim 7 is characterized in that, said system also comprises and is connected and is used to obtain AES that carries encrypted public key and the acquiring unit that carries the decipherment algorithm of decrypted private key with said receiving element.
9. IEC104 protocol massages system for transmitting according to claim 8; It is characterized in that the form of said message comprises that message starts character, control message length L1, control message, message ending character, signature message identification, signature message length L2, control bit C, reserved place S, timestamp, safety label and signature digest.
10. according to the described IEC104 protocol massages of claim 7-9 system for transmitting, it is characterized in that,
Carry out encryption and decryption through the ECC algorithm.
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| CN108234468A (en) * | 2017-12-28 | 2018-06-29 | 中国电子科技集团公司第三十研究所 | A kind of cross-domain data transmission guard method based on label |
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| 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 |
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| CN108234468A (en) * | 2017-12-28 | 2018-06-29 | 中国电子科技集团公司第三十研究所 | A kind of cross-domain data transmission guard method based on label |
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Application publication date: 20120111 |