CN108632035B - Inadvertent transmission system and method with access control - Google Patents
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000003993 interaction Effects 0.000 claims abstract description 10
- 230000007246 mechanism Effects 0.000 claims abstract description 8
- 238000012795 verification Methods 0.000 claims description 8
- 230000006870 function Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 238000007418 data mining Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/30—Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy
- H04L9/3066—Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy involving algebraic varieties, e.g. elliptic or hyper-elliptic curves
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
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- 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
- H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
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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
- H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
- H04L63/083—Network architectures or network communication protocols for network security for authentication of entities using passwords
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
- H04L9/0861—Generation of secret information including derivation or calculation of cryptographic keys or passwords
- H04L9/0869—Generation of secret information including derivation or calculation of cryptographic keys or passwords involving random numbers or seeds
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Abstract
The invention discloses an accidental transmission system with access control and a method thereof, wherein the system comprises a database server, an authority issuing mechanism and a user client; the server has n pieces of information, and each piece of information has own access authority; the authority issuing mechanism issues authority for the user applying for accessing the information; the user client finally obtains the information that the user client wants from the database service. Firstly, initializing a system; then, carrying out first interaction, and encrypting the transmission user to obtain access authority; then, carrying out second interaction, encrypting and transmitting to generate information of each item in the database server; finally, decrypting to obtain required information, and verifying; the invention is particularly suitable for the safe data transmission of both communication parties; inadvertent transmission with access control is proposed; allowing a user to anonymously query a database, each message being protected by an access control policy; has high practicability.
Description
Technical Field
The invention belongs to the technical field of network information security, relates to an accidental transmission system with access control and a method thereof, and particularly relates to an accidental transmission system and a method thereof for a user with access control by utilizing encrypted transmission of elliptic curve operation.
Background
With the rapid development of mobile internet, data mining and big data, more and more network applications are popularized in people's life, such as online shopping and medical information inquiry. On one hand, information is transmitted on the Internet, so that the production and the life of people are more convenient, and the rise of emerging industries and the high-speed development of social economy are promoted; on the other hand, as people leave more access traces of themselves on network applications, the problem of privacy disclosure of users caused by the access traces is more and more prominent. The inadvertent transmission protocol is widely used, i.e. information is delivered in an obfuscated manner, thereby protecting the privacy of both parties. How to make the efficiency of the careless transmission more efficient, the transmission process is safer. Is a key technical element for further development of the inadvertent transmission technology.
In many practical applications, on the one hand, the database server wants to implement an access control policy on the database, prohibiting the client from retrieving information of its choice without any restriction, for example, when banking is involved, the user is not able to retrieve information of other users. On the other hand, user clients do not want the database server to know that they are learning about the messages they are retrieving, e.g., on social networking sites, users do not want the server to know how they are viewing the retrieved messages. Thus, an oblivious transport protocol with access control has practical significance.
In the past, in an Access Control over-the-clock (OTAC) scheme, on one hand, rights management of information is mostly given rights based on roles, Access rights of information are encapsulated in the roles, and system rights are distributed by distributing the roles, that is, database information is in a set manner. However, the management mode has the hidden dangers of inflexible authorization and inconvenient expansion. On the other hand, in the solution of the inadvertent transmission, the calculated amount is large, so that the resource consumption is increased in the system operation, and the operation speed is reduced; therefore, the method and the system for careless transmission with access control are designed, and have great theoretical and practical significance for improving the transmission efficiency on the premise of ensuring the safety.
Disclosure of Invention
In order to solve the above technical problems, the present invention provides a system and a method for realizing user accidental transmission with access control by using encrypted transmission of elliptic curve operation.
The technical scheme adopted by the system of the invention is as follows: an inadvertent transmission system with access control, comprising: the system comprises a database server, an authority issuing mechanism and a user client; the server has n pieces of information, and each piece of information has own access authority; the authority issuing mechanism issues authority for the user applying for accessing information; the user client finally obtains the information that the user client wants from the database service.
The method adopts the technical scheme that: an inadvertent transmission method with access control, comprising the steps of:
step 1: initializing;
the database server generates a unique message verification code for each piece of information to the user;
step 2: a first interaction;
the user client encrypts and transmits the acquired authority to the database server;
and step 3: performing second interaction;
the database server encrypts and transmits each plaintext to the user client;
and 4, step 4: calculating the required plaintext miAnd verify mi(ii) a Where i is the index number of the message the user client wants to obtain, miThe ith message owned by the database server.
The invention discloses an inadvertent transmission method with access control and a system thereof, which create a database for protecting privacy and prevent illegal users from accessing the database; data is allowed to query the database anonymously, where each message is protected by an access control policy and can only be obtained if the user has ownership rights. In addition, an elliptic curve is used for encrypting in the transmission process; and the correctness of the received information is verified at the end of each transmission process.
Compared with the prior art, the method of the invention has the following advantages:
in the traditional irregular transmission with access control, the authority management mostly adopts a set mode to carry out authority management and authority differentiation, so that the expansibility and maintainability of the system are poor, and the later management is complex. In the method, a piece of information is adopted to independently set a permission, and each piece of information is an independent individual. Thus, the problem of large-scale user dynamic expansion is solved. The expandability and maintainability of the system are improved.
Secondly, in the traditional protocol strategy of careless transmission, decryption operation is carried out on intermediate variables, and energy consumption is increased in system operation. In the method, after the encryption operation is performed on the intermediate variable, a mutual elimination strategy is adopted, and a decryption operation is not adopted. Therefore, the operation efficiency and the operation speed can be improved.
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FIG. 1: an instantiated system model diagram of the invention;
FIG. 2: a method flow diagram of an implementation of the present invention;
FIG. 3: the present invention is an instantiated data transfer process flow diagram.
Detailed Description
In order to facilitate understanding and implementation of the present invention for those of ordinary skill in the art, the present invention is further described in detail below with reference to the accompanying drawings and examples, it being understood that the implementation examples described herein are only for the purpose of illustration and explanation and are not intended to limit the present invention.
Referring to fig. 1, the system for transmitting an oblivious message with access control provided by the present invention includes a database server, an authority issuing mechanism, and a user client; the server has n pieces of information, and each piece of information has own access authority; the authority issuing mechanism issues authority for the user applying for accessing the information; the user client finally obtains the information that the user client wants from the database service.
Referring to fig. 2, the method for performing an inadvertent transmission with access control provided by the present invention specifically includes the following steps:
step 1: initializing;
the database server generates a unique message verification code for each piece of information to the user;
the specific implementation comprises the following substeps:
step 1.1: generating unique generated message hash value H for each piece of information in database server1、…、HnAs a message authentication code;
referring to fig. 3, the database server is a server composed of n pieces of secret information, and calculates Hj←H(j,mj,ACPj) Generating a message verification code H carrying plaintext informationj: wherein n represents the number of information held by the server, j represents the j-th information, mjPlaintext indicating j-th message, ACPjRepresenting the authority required for reading the jth message;
H(j,mj,ACPj) Is a collision-free hash function that maps each piece of data provided by the database server to a fixed-length value, called the hash value, and provides an error detection capability for the final client to authenticate the resulting message.
Step 1.2: the database server verifies the generated message verification code H1...HnAnd sending the information to the information receiver.
Step 2: a first interaction;
the user client encrypts and transmits the acquired authority to the database server;
the specific implementation comprises the following substeps:
step 2.1: the user client has two parameters i, ACPi(ii) a Calculate hi←H1(i,ACPi) Generating a message authentication code h without plaintext informationi: wherein i is an index number of a message that the user client wants to obtain;
H1(i,ACPi) Is a collision-free hash function, and is used for mapping the authority obtained by the user into a value belonging to Zq *；Zq *All prime numbers of the interval { 0.,. q-1}, and the value of q is generated by an elliptic curve public key system.
The hash function has the function that the authority acquired by the client can be encrypted by using the operation on the elliptic curve and then transmitted to the database server.
Step 2.2: the user client selects a random number a, which the user client uses (a, h)i) Encrypting (a, h) using elliptic curvesi) Generation of Ri；
Wherein R isi＝a·P+hiP, the point P is a base point generated by an elliptic curve public key system;
step 2.3: the user client will generate R from step 2.2iAnd sending the data to a database server.
And step 3: performing second interaction;
the database server encrypts and transmits each plaintext to the user client;
the specific implementation comprises the following substeps:
step 3.1: the database server has N pieces of information, and the hash value h without the plaintext message is calculated by using the first piece of information in step 2.11。
Step 3.2: database service computation S1＝m1+Ri-h1P; wherein m is1Is the first piece of information owned by the database server; riAfter step 2.3 is executed, the database server receives the message; h is1P is h1Data encrypted by an elliptic curve public key system;
step 3.3: and (3) circulating the steps 3.1 and 3.2, sequentially calculating the second message to the last message, and calculating S2...Sj....Sn(ii) a Wherein S isjRepresenting an encrypted value corresponding to the jth message in the database server;
step 3.4: message parameter (S) is sent by information owner1...Sn) And sending the information to the information receiver.
And 4, step 4: calculating the required plaintext miAnd verify mi；miThe ith message owned by the database server;
the specific implementation comprises the following substeps:
step 4.1: s obtained by user client using second interactioniGenerating a random number a only known by self in a first interaction manner, and calculating a plaintext mi＝Si-a.p; the point P is a base point generated by an elliptic curve public key system;
step 4.2: using the message authentication code H generated in step 1iVerification miAccuracy of (2)。
User client using m obtained in step 4.1iAnd previously owned i, ACPiObtaining a message authentication code Hj←H(j,mj,ACPj). Judging H obtained in the stepi、hjWith H obtained in step 11...HnH in (1)iWhether they are the same or not, and if so, it indicates that the information receiver has obtained the desired information mi。
The invention creates a database for protecting privacy and prevents illegal users from accessing the database. Data is allowed to query the database anonymously, where each message is protected by an access control policy, which can only be obtained if the user has ownership rights. The invention provides an accidental transmission method and system with access control by using an elliptic curve encryption algorithm on the premise of ensuring the anonymity of users.
The invention realizes the careless transmission with access control, which can make the information transmit the content in a fuzzification way, simultaneously considers the safety of both the user terminal and the server, improves the past proposal, effectively solves the problem of large-scale user dynamic expansion, increases the maintainability and reduces the unnecessary decryption step in the transmission process.
It should be understood that parts of the specification not set forth in detail are prior art.
It should be understood that the above description of the preferred embodiments is given for clarity and not for any purpose of limitation, and that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (4)
1. An inadvertent transmission method with access control adopts an inadvertent transmission system with access control;
the method is characterized in that: the system comprises a database server, a permission issuing mechanism and a user client; the server has n pieces of information, and each piece of information has own access authority; the authority issuing mechanism issues authority for the user applying for accessing information; the user client finally obtains the information which the user client wants from the database service;
the method comprises the following steps:
step 1: initializing;
the database server generates a unique message verification code for each piece of information to the user;
step 2: a first interaction;
the user client encrypts and transmits the acquired authority to the database server;
the specific implementation of the step 2 comprises the following substeps:
step 2.1: the user client has two parameters i, ACPiCalculating the hash value h without plaintext informationi；
Wherein h isi←H1(i,ACPi) Generating a message authentication code h without plaintext informationi: where i represents the index of the message that the information recipient wants to obtain, ACPiThe authority required for reading the ith piece of information;
step 2.2: the user client selects a random number a, which the user client uses (a, h)i) Generating R by using elliptic curve public key system encryptioni；
Wherein R isi＝a·P+hiP; p is a point on the elliptic curve, and the point is a base point generated by an elliptic curve public key system;
step 2.3: the user client will generate R from step 2.2iSending the data to a database server;
and step 3: performing second interaction;
the database server encrypts and transmits each plaintext to the user client;
and 4, step 4: calculating the required plaintext miAnd verify mi(ii) a Where i is the index number of the message the user client wants to obtain, miThe ith message owned by the database server.
2. The method for inadvertent transmission with access control as claimed in claim 1, wherein the step 1 is implemented by the following sub-steps:
step 1.1: generating a unique message hash value for each piece of information in the database server, and finally generating H1…HnAs a message authentication code;
wherein Hj←H(j,mj,ACPj) Generating a message authentication code H carrying plaintext informationjJ denotes the jth information, mjPlaintext indicating j-th message, ACPjThe j is 1, 2, …, n represents the number of information held by the server;
step 1.2: the database server verifies the generated message verification code H1、…、HnAnd sending the information to the information receiver.
3. The method of claim 1, wherein the step 3 is implemented by the following sub-steps:
step 3.1: the database server has N pieces of information, and the hash value h without the plaintext message is calculated by using the first piece of information in step 2.11；
Step 3.2: database service computation S1＝m1+Ri-h1P; wherein m is1Is the first piece of information owned by the database server; riAfter step 2.3 is executed, the database server receives the message; h is1P is h1Data encrypted by an elliptic curve public key system;
step 3.3: and (3) circulating the steps 3.1 and 3.2, sequentially calculating the second message to the last message, and calculating S2...Sj....SnIn which S isjRepresenting an encrypted value corresponding to the jth message in the database server;
step 3.3: message parameter (S) is sent by information owner1...Sn) And sending the information to the information receiver.
4. The method of claim 3, wherein the step 4 is implemented by the following sub-steps:
step 4.1: s obtained by user client using second interactioniGenerating a random number a only known by self in a first interaction manner, and calculating a plaintext mi＝Si-a.p; the point P is a base point generated by an elliptic curve public key system;
step 4.2: using the message authentication code H generated in step 1iVerification miThe correctness of the operation.
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| CN110650119B (en) * | 2019-08-20 | 2022-01-21 | 创新先进技术有限公司 | Data transmission method and device and electronic equipment |
| CN110839030B (en) * | 2019-11-15 | 2021-11-19 | 内蒙古大学 | Authority transfer method in block chain access control |
| CN111092871B (en) * | 2019-12-11 | 2021-06-08 | 支付宝(杭州)信息技术有限公司 | Data sharing method and device for personal information protection and electronic equipment |
| CN111898157B (en) * | 2020-07-23 | 2024-03-26 | 东南大学 | Unintentional storage access method for machine learning multisource training set |
| CN112134682B (en) * | 2020-09-09 | 2022-04-12 | 支付宝(杭州)信息技术有限公司 | Data processing method and device for OTA protocol |
| CN113259329B (en) * | 2021-04-26 | 2022-07-15 | 北京信安世纪科技股份有限公司 | Method and device for data careless transmission, electronic equipment and storage medium |
| CN114301609B (en) * | 2022-03-01 | 2022-05-17 | 华控清交信息科技(北京)有限公司 | Inadvertent transmission method, multi-party secure computing platform and device for inadvertent transmission |
| CN114301594B (en) * | 2022-03-01 | 2022-05-17 | 华控清交信息科技(北京)有限公司 | Inadvertent transmission method, multi-party secure computing platform and device for inadvertent transmission |
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Application publication date: 20181009 Assignee: TOMATO TECHNOLOGY (WUHAN) Co.,Ltd. Assignor: HUBEI University OF TECHNOLOGY Contract record no.: X2023980054595 Denomination of invention: An inadvertent transmission system and method with access control Granted publication date: 20210219 License type: Common License Record date: 20231228 |