CN102684879A - Method and system for remote bid opening and bid evaluation - Google Patents
Method and system for remote bid opening and bid evaluation Download PDFInfo
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- CN102684879A CN102684879A CN2012101323190A CN201210132319A CN102684879A CN 102684879 A CN102684879 A CN 102684879A CN 2012101323190 A CN2012101323190 A CN 2012101323190A CN 201210132319 A CN201210132319 A CN 201210132319A CN 102684879 A CN102684879 A CN 102684879A
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Abstract
The invention relates to data safety technology, and particularly discloses a method and a system for remote bid opening and bid evaluation. The method includes the steps: uploading bidding documents, primarily encrypting the bidding documents and secondarily encrypting a primary encryption key; receiving and decrypting the bidding documents in an online manner, decrypting the primary encryption key by acquiring a secondary primary encryption key, and then decrypting the bidding documents by the aid of the primary encryption key; verifying validity of the bidding documents and generating a bid opening list when bid opening time comes; distributing bid inviting documents, the bidding documents and bid opening process documents; and performing evaluation according to preset evaluation standards to obtain bid evaluation results. The system comprises a bidding service subsystem, a bid opening service subsystem and a bid evaluation service subsystem, wherein the bid opening service subsystem is capable of decrypting the secondarily encrypted bidding documents in the online manner and providing the corresponding bid inviting documents, the bidding documents and the bid opening process documents to the bid evaluation service subsystem for evaluation. By the aid of the method and the system, safety of the bidding documents is facilitated, and decrypting efficiency is improved.
Description
Technical field
The present invention relates to the data security technology, is a kind of long-range open sealed tenders method and system based on the Internet specifically, and the long-range opening of bid, the bid that are applied to bid are professional, can improve the Information Security in the electronics open sealed tenders process effectively.
Background technology
At present, along with the maturation of Internet technology, various based on network application services are developed rapidly, long-range Tender System (like government procurement) a kind of instance that comes to this.Long-range Tender System all comprises long-range opening of bid process and long-range assessment of bids process:
So-called long-range opening of bid refers to through the bid service channel, the acceptance of tenders file, and scene or network decrypting tender documents also verify that it closes activity, reads tender documents, generate the opening of bid list;
Assessment of bids service channel is specified in the so-called long-range assessment of bids, distribution bidding document, tender documents, opening of bid list and procedure file, the organization network assessment of bids (local network or strange land network); Assessment of bids expert according to the requirement of bidding document and relevant policies, carries out the assessment of bids through special-purpose software.
For traditional invitation system, have remarkable advantages based on the long-range invitation system of the Internet:
In the tradition bid activity, the bidder must arrive the on-the-spot opening of bid of participating in of opening of bid of bid inviter's appointment, and assessment of bids expert must arrive the assessment of bids place of appointment, participates in the assessment of bids; Before the opening of bid,, can't know in advance, increase the opening of bid expense if do not meet legal opening of bid condition (like discontented 3 families of effective bidder); Means fall behind in the open sealed tenders process, and mode is single, inefficiency, and work quality is low; Assessment of bids result receives about assessment of bids expert, and the assessment of bids is unfair, injustice; Assessment of bids process lacks supervision; Bidder's traveling expense height of participating in opening bid.
In the long-range open sealed tenders system, through building special-purpose bid service channel, assessment of bids service channel, accomplish the network open sealed tenders, the bidder can arrive the on-the-spot opening of bid of participating in, and assessment of bids expert also need not be to unique given place participation assessment of bids; Before the opening of bid, can remind the bid inviter automatically, whether reach legal opening of bid condition; Realize the open sealed tenders procedural informationization, increase work efficiency and the as received basis reason, improve assessment of bids process supervision; Reduce bidder, bid inviter's expense.
There is certain defective in existing long-range open sealed tenders scheme; Mainly show the Information Security of tender documents is considered not enough science, specifically comprise the following aspects: tender documents all are to use simple symmetrical expression algorithm or the precession of asymmetric algorithm close.The simple symmetrical expression algorithm for encryption of using, dangerous, easy crack; The simple asymmetric algorithm secret key of using, encryption/decryption speed is slow, be not easy to management in the use.Because the asymmetric algorithm need provide private key to decipher deciphering, thereby often needs the user to provide private key to accomplish deciphering to the scene, has brought the problem of fail safe and efficient like this.
Summary of the invention
To the defective of prior art, the object of the present invention is to provide a kind of long-range open sealed tenders method and system, help improving the Information Security of tender documents.
For solving above technical problem, technical scheme provided by the invention is that a kind of long-range open sealed tenders method may further comprise the steps:
Upload tender documents, these tender documents are once encrypted, and an encryption key is carried out superencipher;
Receive and online deciphering tender documents, through obtaining the superencipher key, in order to decipher this encryption key, afterwards with these these tender documents of encryption key deciphering;
Checking tender documents legitimacy, and when the opening of bid time arrives, generate the opening of bid list;
Evaluation criteria according to predetermined is evaluated, and obtains assessment of bids result.
More excellent ground is once encrypted and is adopted symmetrical expression to calculate encryption, and superencipher adopts the asymmetric algorithm for encryption.
More excellent ground, the ciphering process of tender documents is:
Tender documents are once encrypted with the symmetrical expression algorithm;
An encrypted symmetric key is carried out superencipher with the asymmetric algorithm;
The online decrypting process of tender documents is:
Obtain the superencipher asymmetric privacy keys;
With encrypted symmetric key of superencipher asymmetric privacy keys deciphering;
According to an encrypted symmetric key after the deciphering, tender documents are deciphered.
More excellent ground, encrypted symmetric key and superencipher asymmetric privacy keys are random key.
More excellent ground, tender documents carry out digital signature.
More excellent ground, the concrete grammar of digital signature is:
The original meaning of one's words of data remains unchanged in the data meaning of one's words after signer is initiatively revised original license file to be signed and made modification in the license file and the original license file;
Utilize hash function that amended license file is carried out computing and obtain first hashed value;
First hashed value encrypted obtain digital signature;
License file to be verified and said digital signature are submitted to authentication, and said license file to be verified is an initiatively amended license file of signature back, or signer initiatively amended license file after third party's malicious modification, treat signature file;
Authentication is deciphered first hashed value of said digital signature, and utilizes one-way function that license file to be verified is carried out computing to obtain second hashed value;
Confirm whether first hashed value is identical with second hashed value, if identical then verify successfully, otherwise authentication failed.
More excellent ground; Said active be revised as according to the data type of original license file increase, deletion and/or replacement and do not change the content of the original meaning of one's words of data, the bit wide that makes up sum according to the various modifications mode is not more than the principle of the hashed value bit wide of said one-way hash function and makes amendment.
More excellent ground, said active are revised as an additional scrambler at random that inserts the afterbody of original license file in original license file, and the width of said scrambler at random is not more than the width of said one-way hash function hashed value.
On this basis, the present invention is also corresponding to provide a kind of long-range open sealed tenders system, comprises bid service subsystem, opening of bid service subsystem and assessment of bids service subsystem through Internet connection, wherein:
Said bid service subsystem is used to upload tender documents, and these tender documents are once encrypted, and an encryption key is carried out superencipher;
Said opening of bid service subsystem is used for receiving and online deciphering tender documents, through obtaining the superencipher key, in order to decipher this encryption key, afterwards with these these tender documents of encryption key deciphering; Checking tender documents legitimacy, and when the opening of bid time arrives, generate the opening of bid list; And distribution bidding document, tender documents and opening of bid procedure file;
Said assessment of bids service subsystem is used for evaluating according to predetermined evaluation criteria, obtains assessment of bids result.
More excellent ground, said bid service subsystem is provided with the digital signature unit, is used for carrying out digital signature to tender documents.
Compared with prior art; In the long-range open sealed tenders technical scheme provided by the invention; Tender documents have adopted the mode of superencipher, promptly when once encrypting tender documents, encryption key are carried out superencipher, can conveniently adopt the online manner of decryption of remote authorization to tender documents thus; Thereby guarantee the Information Security of tender documents, improve the deciphering efficient of tender documents.Especially, tender documents have also carried out digital signature, can prevent the possibility that tender documents are distorted, and have strengthened the Information Security of tender documents, help the potential safety hazard of the system of eliminating.
Description of drawings
In order to be illustrated more clearly in the present invention or technical scheme of the prior art, will do to introduce simply to the accompanying drawing of required use in the embodiment of the invention or the prior art below.Obviously, the accompanying drawing in describing below only is some embodiments of the present invention.For those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the flow chart of the long-range open sealed tenders method of the embodiment of the invention;
Fig. 2 is the ciphering process figure of tender documents in the long-range open sealed tenders method of the embodiment of the invention;
Fig. 3 is the decrypting process figure of tender documents in the long-range open sealed tenders method of the embodiment of the invention;
Fig. 4 is the digital signature procedure figure of tender documents in the long-range open sealed tenders method of the embodiment of the invention;
Fig. 5 is the composition frame chart of the long-range open sealed tenders of embodiment of the invention system.
Embodiment
The basic design of the embodiment of the invention is that tender documents carry out superencipher, to guarantee the Information Security of tender documents; And further, tender documents adopt digital signature, prevent that tender documents from being distorted, and strengthen the Information Security of tender documents.
In order to make those skilled in the art understand technical scheme of the present invention better, the present invention is done further detailed description below in conjunction with accompanying drawing and specific embodiment.
Referring to Fig. 1, the flow chart of the long-range open sealed tenders method of the expression embodiment of the invention.Tender documents in the long-range open sealed tenders method of this embodiment have used the method for superencipher, can improve the data security of tender documents, specifically may further comprise the steps:
S101, upload tender documents, these tender documents are once encrypted, and an encryption key is carried out superencipher;
S102, reception and online deciphering tender documents are through obtaining the superencipher key, in order to decipher this encryption key, afterwards with this these tender documents of encryption key deciphering;
S103, checking tender documents legitimacy, and when the opening of bid time arrives, generate the opening of bid list;
S104, distribution bidding document, tender documents and opening of bid procedure file;
S105, evaluate (comprising computer evaluation automatically, preliminary review, evaluation in detail, gross differences evaluation), obtain assessment of bids result according to predetermined evaluation criteria.
Because tender documents have adopted the mode of superencipher; Promptly when once encrypting tender documents, encryption key is carried out superencipher; Can adopt the online manner of decryption of remote authorization to tender documents easily thus; Thereby guarantee the Information Security of tender documents, improve the deciphering efficient of tender documents.
In the embodiment of the invention; Once encryption and superencipher adopt the compound mode of symmetrical expression algorithm and/or asymmetric algorithm: so-called symmetrical expression encryption/decryption algorithm is exactly that same key is used in encryption and decryption; Usually the encryption technology that is referred to as " Session Key " is at present by extensive employing; Like the des encryption standard that U.S. government adopted is exactly a kind of typical " symmetrical expression " enciphered method, and its Session Key length is 56Bits; It is not same key that so-called asymmetric enciphering and deciphering algorithm is exactly encryption and decryption employed; Two keys are arranged usually, be called " PKI " and " private key ", their two essential pairings are used; Otherwise can not open encrypt file (like RSA Algorithm); Here " PKI " refer to externally to announce, " private key " then can not, can only know by people of holder.
In the present embodiment, once encrypt and adopt symmetrical expression to calculate encryption, superencipher adopts the asymmetric algorithm for encryption.
In the long-range open sealed tenders method of present embodiment, the concrete encryption of tender documents, decrypting process are described below.
Referring to Fig. 2, the ciphering process of tender documents in the long-range open sealed tenders method of expression present embodiment specifically may further comprise the steps:
S201, tender documents are once encrypted with the symmetrical expression algorithm;
S202, an encrypted symmetric key is carried out superencipher with the asymmetric algorithm.
Referring to Fig. 3, the online decrypting process of tender documents in the long-range open sealed tenders method of expression present embodiment specifically may further comprise the steps:
S301, obtain and use the superencipher asymmetric privacy keys;
S302, with encryption key of superencipher asymmetric privacy keys deciphering;
S303, according to the deciphering after an encrypted symmetric key, tender documents are deciphered.
In addition, the tender documents in the long-range open sealed tenders method of the embodiment of the invention also carry out digital signature.So-called digital signature is attached to some data on the data cell exactly, or the cryptographic transformation that the data unit is done.This data or conversion allow the recipient of data cell in order to the source of affirmation data cell and the integrality and the protected data of data cell, prevent to be forged by people (for example recipient).It is a kind of method that the message of electronic form is signed, and wherein each signature information can be transmitted in a communication network.
Like this, present embodiment can prevent the possibility that tender documents are distorted, and strengthens the Information Security of open sealed tenders file, eliminates the potential safety hazard of open sealed tenders system.
For further improving the security reliability of tender documents digital signature, the embodiment of the invention is improved the mode of digital signature, further describes as follows.
Referring to Fig. 4, the process of digital signature in the long-range open sealed tenders method of expression present embodiment specifically may further comprise the steps:
The original meaning of one's words of data remains unchanged in the data meaning of one's words after S401, signer (tenderer) are initiatively revised original license file (tender documents) to be signed and made modification in the license file and the original license file;
S402, utilize hash function that amended license file is carried out computing to obtain first hashed value;
S403, to the close digital signature that obtains of the first hashed value precession;
S404, license file to be verified and said digital signature are submitted to authentication, said license file to be verified is an initiatively amended license file of signature back, or signer initiatively amended license file after third party's malicious modification, treat signature file;
S405, authentication are deciphered first hashed value of said digital signature, and utilize one-way function that license file to be verified is carried out computing to obtain second hashed value;
S406, confirm whether first hashed value is identical with second hashed value, if identical then verify successfully, otherwise authentication failed.
Digital signature in the long-range open sealed tenders method of the foregoing description is encrypted, is deciphered and adopt symmetrical encryption/decryption algorithm or asymmetric encryption/decryption algorithm; Initiatively revise and can adopt one of following mode:
(1) according to the data type of original license file increase, deletion and/or replacement and do not change the content of the original meaning of one's words of data, the bit wide that wherein makes up sum according to the various modifications mode is not more than the principle of the hashed value bit wide of said one-way hash function and makes amendment;
(2) be an additional scrambler (can be the pseudo random number ordered series of numbers constitutes) at random in original license file, said scrambler at random inserts the afterbody of original license file, and the width of scrambler is not more than the width of said one-way hash function hashed value at random;
Thus; Initiatively original license file is carried out constant the distorting of the original meaning of one's words of protected data through signer; Do not have in performance under the prerequisite of obviously influence digital signature system; Let the fail safe of digital signature physique depend on the second preimage problem that more is difficult to resolve of used one-way hash function, be no longer dependent on the collision problem of relatively easy solution, thereby the fail safe of digital signature system is provided effectively.
More than the long-range open sealed tenders method of the present invention has been carried out detailed description; A kind of long-range open sealed tenders system has been proposed on this basis; It is through building special-purpose bid service channel (subsystem), opening of bid service channel (subsystem) and assessment of bids service channel (subsystem); Can accomplish the network open sealed tenders, the bidder can arrive the on-the-spot opening of bid of participating in, and assessment of bids expert also need not participate in the assessment of bids to unique given place; Before the opening of bid, can remind the bid inviter automatically, whether reach legal opening of bid condition; Realize the open sealed tenders procedural informationization, increase work efficiency and the as received basis reason, improve assessment of bids process supervision; Reduce bidder, bid inviter's expense.
The structure of this embodiment is that (1) set up special-purpose assessment of bids service channel; (2) online deciphering tender documents; (3) generate the opening of bid list; (4) distribution bidding document, tender documents, opening of bid procedure file; (5) the automatically evaluation that uses a computer.Further the long-range open sealed tenders system of this embodiment is described below.
Referring to Fig. 5, the composition frame chart of the long-range open sealed tenders of expression embodiment of the invention system.This long-range open sealed tenders system 500 comprises bid service subsystem 501, opening of bid service subsystem 502 and the assessment of bids service subsystem 503 through Internet connection, wherein:
Bid service subsystem 501 is used to upload tender documents, and these tender documents are once encrypted, and an encryption key is carried out superencipher;
Opening of bid service subsystem 502 is used for receiving and online deciphering tender documents, through obtaining the superencipher key, in order to decipher this encryption key, afterwards with these these tender documents of encryption key deciphering; Checking tender documents legitimacy, and when the opening of bid time arrives, generate the opening of bid list; And distribution bidding document, tender documents and opening of bid procedure file;
Assessment of bids service subsystem 503 is used for evaluating according to predetermined evaluation criteria, obtains assessment of bids result.
In the long-range open sealed tenders technical scheme shown in this embodiment; Tender documents have adopted the mode of superencipher; Promptly when once encrypting tender documents, encryption key is carried out superencipher; Can conveniently adopt the online manner of decryption of remote authorization thus, thereby guarantee the Information Security of tender documents, improve the deciphering efficient of tender documents tender documents.
Especially; Be provided with digital signature unit (scheming not shown) in the bid service subsystem 501, be used for carrying out digital signature, with the possibility that prevents that tender documents from being distorted to tender documents; Strengthen the Information Security of open sealed tenders file, eliminate the potential safety hazard of open sealed tenders system.
The above embodiment of the present invention can realize that for example C language, assembler language are realized with software, and corresponding software can be stored in the storage medium that can read, for example in the hard disk of computer, the internal memory.
Only be preferred implementation of the present invention below, should be pointed out that above-mentioned preferred implementation should not be regarded as limitation of the present invention, protection scope of the present invention should be as the criterion with claim institute restricted portion.For those skilled in the art, do not breaking away from the spirit and scope of the present invention, can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (10)
1. a long-range open sealed tenders method is characterized in that, may further comprise the steps:
Upload tender documents, these tender documents are once encrypted, and an encryption key is carried out superencipher;
Receive and online deciphering tender documents, through obtaining the superencipher key, in order to decipher this encryption key, afterwards with these these tender documents of encryption key deciphering;
Checking tender documents legitimacy, and when the opening of bid time arrives, generate the opening of bid list;
Distribution bidding document, tender documents and opening of bid procedure file;
Evaluation criteria according to predetermined is evaluated, and obtains assessment of bids result.
2. long-range open sealed tenders method as claimed in claim 1 is characterized in that, once encrypts and adopts symmetrical expression to calculate encryption, and superencipher adopts the asymmetric algorithm for encryption.
3. long-range open sealed tenders method as claimed in claim 2 is characterized in that,
The ciphering process of tender documents is:
Tender documents are once encrypted with the symmetrical expression algorithm;
An encrypted symmetric key is carried out superencipher with the asymmetric algorithm;
The online decrypting process of tender documents is:
Obtain the superencipher asymmetric privacy keys;
With encrypted symmetric key of superencipher asymmetric privacy keys deciphering;
According to an encrypted symmetric key after the deciphering, tender documents are deciphered.
4. long-range open sealed tenders method as claimed in claim 3 is characterized in that, encrypted symmetric key and superencipher asymmetric privacy keys are random key.
5. like each described long-range open sealed tenders method of claim 1～4, it is characterized in that tender documents carry out digital signature.
6. long-range open sealed tenders method as claimed in claim 5 is characterized in that the concrete grammar of digital signature is:
The original meaning of one's words of data remains unchanged in the data meaning of one's words after signer is initiatively revised original license file to be signed and made modification in the license file and the original license file;
Utilize hash function that amended license file is carried out computing and obtain first hashed value;
First hashed value encrypted obtain digital signature;
License file to be verified and said digital signature are submitted to authentication, and said license file to be verified is an initiatively amended license file of signature back, or signer initiatively amended license file after third party's malicious modification, treat signature file;
Authentication is deciphered first hashed value of said digital signature, and utilizes one-way function that license file to be verified is carried out computing to obtain second hashed value;
Confirm whether first hashed value is identical with second hashed value, if identical then verify successfully, otherwise authentication failed.
7. long-range open sealed tenders method as claimed in claim 6; It is characterized in that; Said active be revised as according to the data type of original license file increase, deletion and/or replacement and do not change the content of the original meaning of one's words of data, the bit wide that makes up sum according to the various modifications mode is not more than the principle of the hashed value bit wide of said one-way hash function and makes amendment.
8. long-range open sealed tenders method as claimed in claim 6; It is characterized in that; Said active is revised as an additional scrambler at random that inserts the afterbody of original license file in original license file, and the width of said scrambler at random is not more than the width of said one-way hash function hashed value.
9. a long-range open sealed tenders system is characterized in that, comprises bid service subsystem, opening of bid service subsystem and assessment of bids service subsystem through Internet connection, wherein:
Said bid service subsystem is used to upload tender documents, and these tender documents are once encrypted, and an encryption key is carried out superencipher;
Said opening of bid service subsystem is with receiving and online deciphering tender documents, through obtaining the superencipher key, in order to decipher this encryption key, afterwards with these these tender documents of encryption key deciphering; Checking tender documents legitimacy, and when the opening of bid time arrives, generate the opening of bid list; And distribution bidding document, tender documents and opening of bid procedure file;
Said assessment of bids service subsystem is used for evaluating according to predetermined evaluation criteria, obtains assessment of bids result.
10. long-range open sealed tenders as claimed in claim 9 system is characterized in that said bid service subsystem is provided with the digital signature unit, is used for carrying out digital signature to tender documents.
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| CN108171525A (en) * | 2018-01-24 | 2018-06-15 | 中航技国际经贸发展有限公司 | A kind of online opening of bid management method and system |
| CN108319860A (en) * | 2018-02-07 | 2018-07-24 | 南通市公共资源交易中心 | A kind of long-range bid opening and bid appraisal management method, management system and management equipment |
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Application publication date: 20120919 |