CN107484161B - A kind of efficient information push based on mobile self-grouping network and safe sharing method - Google Patents
A kind of efficient information push based on mobile self-grouping network and safe sharing method Download PDFInfo
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- CN107484161B CN107484161B CN201710606319.2A CN201710606319A CN107484161B CN 107484161 B CN107484161 B CN 107484161B CN 201710606319 A CN201710606319 A CN 201710606319A CN 107484161 B CN107484161 B CN 107484161B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/02—Protecting privacy or anonymity, e.g. protecting personally identifiable information [PII]
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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
- H04L63/10—Network architectures or network communication protocols for network security for controlling access to devices or network resources
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/08—Access security
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Abstract
The present invention relates to a kind of efficient information push and safe share system and method based on mobile self-grouping network, solve the problems, such as that information sharing lacks safety, actual effect and access control in existing mobile self-grouping network.System includes insincere third party Internet Service Provider, key generation centre, agent side, information publisher, shares user.Key generation centre generates the decrypted private key and public key of user, is sent to agent side by network, information publisher, shares user；Agent side pushes messages to the user of access authority；Information publisher formulates access control policy, is compressed to information, generates snapshot and encryption；Share user snapshot, information are decrypted and are decompressed, obtains prime information.The present invention is based on attribute encryption technologies, can the shared information in mobile self-grouping network be compressed, encrypt and efficiently be pushed, and guarantee the high efficiency that information is shared in mobile social networking, safety, confidentiality, realize effective access control.
Description
Technical field
The present invention relates to a kind of field of information security technology, are based on attribute encryption technology, fine granularity more particularly, to one kind
In the mobile self-grouping network of access control the efficient cryptographic of information with share.
Background technique
Nowadays, mobile ad hoc networks have become the important component that we produce, live, Internet of Things, mobile Internet
Network etc. revolutionizes the information interchange mode between object.These mobile self-grouping networks provide various between node
Interaction mechanism, thus generated security risk also has been to be concerned by more and more people.One of major issue is how
The privacy for protecting nodal information publication, guarantees the access control of information, prevents information leakage, even if the service provider of network
It cannot obtain its content.
In the prior art, Randy Baden et al. was published in " ACM SIGCOMM Computer in 2009
Communication Review " paper " Persona:an online social network with user-
Defined privacy " in support public-key encryption and the encryption based on attribute；Amin Tootoonchian et al. exists
It is published within 2009 " Proceedings of the 5th International Conference on Emerging
Networking Experiments and Technologies " paper " Lockr:better privacy for
Social networks " in, content is separated with function, this allows user to determine wherein to store their letter
Breath.These schemes focus on the fine access control of data, but do not account under mobile network how at the same guarantee the efficient of message
Push.
Summary of the invention
The present invention mainly solves mobile self-grouping network in the prior art, and the data sharing between user lacks safety
Property, without effectively realize access control the problem of, provide a kind of shifting based on attribute encryption technology and fine-granularity access control
The encryption and sharing method of data in dynamic ad-hoc network.
Above-mentioned technical problem of the invention is mainly to be addressed by following technical proposals:
A kind of efficient information push based on mobile self-grouping network and safe share system, it is characterised in that: including as follows
Five parts: insincere third party Internet Service Provider, agent side, information publisher, shares user at key generation centre；
Wherein,
Key generation centre: the mechanism for generating public key and private key；
Agent side: quickly judge to share whether user possesses access authority, and push messages to access authority
Share user；
Information publisher: formulating access control policy according to demand, is compressed to information, generates snapshot and encryption, and
Ciphertext is uploaded to insincere third party Internet Service Provider；
Share user: snapshot, information being decrypted and decompressed, information original text is obtained.
A kind of efficient information push based on mobile self-grouping network and safe sharing method, using above system, feature
Be the following steps are included:
S1. system is initialized, and generates public key PK and master key MK；
S2. key generation centre generates the decrypted private key SK and transition key TK of the user according to the attribute of user；
S3. information publisher handles shared picture, video, audio-frequency information m using the lossless compression of self-adapting dictionary,
Compressed information PS is obtained, and saves a snapshot Snapshot, information publisher is using AES symmetric encipherment algorithm to compression
Information PS afterwards is encrypted, and the access structure of set information, and AES key and snapshot Snapshot are carried out with access structure
Encryption, is uploaded to insincere third party Internet Service Provider；
S4. never trusted third party Internet Service Provider downloads ciphertext to agent side, judges the access authority for sharing user
Snapshot Snapshot is pushed to if meeting and is shared user by the access control policy for whether meeting ciphertext；
S5. when sharing user click snapshot Snapshot, then information is decrypted, is decompressed, obtain prime information.
A kind of efficient information push based on mobile self-grouping network above-mentioned and safe sharing method, characterized in that step
Initialization procedure includes: in S1
S11. key generation centre operation bilinearity parameter generators generate the Bilinear Groups G that two ranks are prime number p1And GT,
Wherein e:G1×G1→GTFor Bilinear Pairing operation；
S12. from group G1Middle random selection | U | a element obtains generating first h1,…,hU；
S13. random number α is selected1,α2,α∈Zp, so that α=(α1+α2) mod p, ZpFor p-1 factorial method prime number group；
S14. system public key PK and master key MK are obtained,
PK=(g, e (g, g)α,gα,h1,…,hU), MK=gα
Wherein, e (g, g)αIndicate the alpha index operation of Bilinear Pairing, g groups are G1Generation member, gαRefer to generate the α of member g
Number operation.
A kind of efficient information push based on mobile self-grouping network above-mentioned and safe sharing method, characterized in that step
The process of generation private key for user SK and transition key TK includes: in S2
S21. in user's registration, key generation centre is that the user distributes globally unique ID；
S22. key generation centre selects random number t according to master key MK, the attribute set S of user and the ID of user
∈Zp, generate the private key of user:
S23. key generation centre generates the conversion private key TK of user:Transition key is transmitted to agent side.
A kind of efficient information push based on mobile self-grouping network above-mentioned and safe sharing method, information publisher's publication
Message m compresses message, compressed information PS, snapshot Snapshot is encrypted, and be uploaded to insincere third
The process of square Internet Service Provider includes:
S31. AES key SecKey is randomly generated in information publisher；
S32. information publisher encrypts compressed information PS using AES key SecKey, obtains information ciphertext
CT1, while generating snapshot Snapshot；
S33. information publisher defines the access control policy (M, ρ) of message, and wherein M is the linear privacy sharing of l row n column
Matrix, for all i=1, every a line of 2 ... l, the i-th row of matrix M is identified as the function of ρ (i), ρ be one from
1 ..., and l } it is mapped to the function of participant set；
S34. random vector is selectedFor every a line of matrix M, from i=1 to i
=l is calculatedWherein MiThe i-th row vector of homography M, sm are the shared information of information publisher, y2,…,
ynFor ZpThe random number of middle selection,For ZpN random number of middle selection；
S35. information publisher selects random number r according to public key PK, access control policy (M, ρ)1…rl∈Zp, to AES
Key SecKey and snapshot Snapshop encrypt to obtain ciphertext CT, with m ' indicate AES key SecKey and snapshot
Snapshop,
S36. CT1, CT are uploaded to insincere third party Internet Service Provider by information publisher together.
A kind of efficient information push based on mobile self-grouping network above-mentioned and safe sharing method, it is characterized in that agent side
The access authority of user is shared in judgement, and the process for carrying out message push includes:
S41. never trusted third party's ad-hoc network service provider gets the ciphertext CT of user, agent side root to agent side
According to the transition key of user, CT is judged to share whether user has permission to access the information by solving following equation,
∑i∈IMiwi=(1,0 ..., 0)
Wherein, MiThe i-th row vector of representing matrix M, { wi∈Zp}i∈lFor constant.If there is one group of solution { wi∈Zp}i∈l,
It then indicates that sharing user has permission to access, then pushes messages to and share user.
A kind of efficient information push based on mobile self-grouping network above-mentioned and safe sharing method, it is characterized in that step S5
Middle sharing user includes: to the process that information is decrypted
S51. share user never trusted third party Internet Service Provider place downloading ciphertext CT1, CT；
S52. share the private key SK that user utilizes oneself, ciphertext CT calculated as follows,
Wherein, L is the t exponent arithmetic for generating member g, Kρ(i)Generation member h corresponding to attribute for function ρ (i) mappingρ(i)
T exponent arithmetic.
To e (g, g)αsFurther calculating can be obtained m ': m '=C/e (g, g)αs, including AES key SecKey and fast
According to Snapshot；
S53. share user information CT1 is decrypted using AES key SecKey, obtain compressed message PS；
S54. share user to unzip it compressed message using self-adapting dictionary compress mode, obtain former letter
Breath.
Therefore, the present invention devises the method for being suitable for the sharing of mobile self-grouping network information, and the program can be point
It enjoys information and carries out efficiently push and the safe flexible access control shared, carried out for user to its sharing information.Present invention tool
It is easily achieved, the advantages that privacy of user protectiveness is strong, and permission flexibly controls information.
Detailed description of the invention
Attached drawing 1 is a kind of structural frames diagram of the invention.
Specific embodiment
A kind of efficient information push based on mobile self-grouping network and safe share system, it is characterised in that: including as follows
Five parts: insincere third party Internet Service Provider, agent side, information publisher, shares user at key generation centre；
Wherein,
Key generation centre: the mechanism for generating public key and private key；
Agent side: quickly judge to share whether user possesses access authority, and push messages to access authority
Share user；
Information publisher: formulating access control policy according to demand, is compressed to information, generates snapshot and encryption, and
Ciphertext is uploaded to insincere third party Internet Service Provider；
Share user: snapshot, information being decrypted and decompressed, information original text is obtained.
A kind of efficient information push based on mobile self-grouping network and safe sharing method, using above system, feature
Be the following steps are included:
S1. system is initialized, and generates public key PK and master key MK；
S2. key generation centre generates the decrypted private key SK and transition key TK of the user according to the attribute of user；
S3. information publisher handles shared picture, video, audio-frequency information m using the lossless compression of self-adapting dictionary,
Compressed information PS is obtained, and saves a snapshot Snapshot, information publisher is using AES symmetric encipherment algorithm to compression
Information PS afterwards is encrypted, and the access structure of set information, and AES key and snapshot Snapshot are carried out with access structure
Encryption, is uploaded to insincere third party Internet Service Provider；
S4. never trusted third party Internet Service Provider downloads ciphertext to agent side, judges the access authority for sharing user
Snapshot Snapshot is pushed to if meeting and is shared user by the access control policy for whether meeting ciphertext；
S5. when sharing user click snapshot Snapshot, then information is decrypted, is decompressed, obtain prime information.
In step S1, initialization procedure includes:
S11. key generation centre operation bilinearity parameter generators generate the Bilinear Groups G that two ranks are prime number p1And GT,
Wherein e:G1×G1→GTFor Bilinear Pairing operation；
S12. from group G1Middle random selection | U | a element obtains generating first h1,…,hU；
S13. random number α is selected1,α2,α∈Zp, so that α=(α1+α2) mod p, ZpFor p-1 factorial method prime number group；
S14. system public key PK and master key MK are obtained,
PK=(g, e (g, g)α,gα,h1,…,hU), MK=gα
Wherein e (g, g)αIndicate the alpha index operation of Bilinear Pairing, g groups are G1Generation member, gαRefer to generate the α of member g
Number operation.
In step S2, the process for generating private key for user SK and transition key TK includes:
S21. in user's registration, key generation centre is that the user distributes globally unique ID；
S22. key generation centre selects random number t according to master key MK, the attribute set S of user and the ID of user
∈Zp, generate the private key of user:
S23. key generation centre generates the conversion private key TK of user:Transition key is transmitted to agent side；It is false
If three users A, B, C, ID A, B, C, private key and transition key are respectively SKA、TKA, SKB、TKB, SKC、TKC；
A kind of efficient information push based on mobile self-grouping network above-mentioned and safe sharing method, information publisher A hair
Cloth message m, compresses message, and compressed information PS, snapshot Snapshot are encrypted, and is uploaded to insincere
The process of triple net service provider includes:
S31. AES key SecKey is randomly generated in information publisher；
S32. information publisher encrypts compressed information PS using AES key SecKey, obtains information ciphertext
CT1, while generating snapshot Snapshot；
S33. information publisher A defines the access control policy (M, ρ) of message, and the attribute including B, wherein M is l row n column
Linear privacy sharing matrix, for all i=1, every a line of 2 ... l, the i-th row of matrix M is identified as the function of ρ (i),
ρ be one from 1 ..., l+ is mapped to the function of participant set；
S34. random vector is selectedFor every a line of matrix M, from i=1 to i
=l is calculatedWherein MiThe i-th row vector of homography M, sm are the shared information of information publisher, y2,…,
ynFor ZpThe random number of middle selection,For ZpN random number of middle selection；
S35. information publisher A selects random number r according to public key PK, access control policy (M, ρ)1…rl∈Zp, to AES
Key SecKey and snapshot Snapshop encrypt to obtain ciphertext CT, with m ' indicate AES key SecKey and snapshot
Snapshop,
S36. CT1, CT are uploaded to insincere third party Internet Service Provider by information publisher together.
The access authority of user is shared in agent side judgement, and the process for carrying out message push includes:
S41. never trusted third party Internet Service Provider gets the ciphertext CT of user to agent side, agent side according to
The transition key at family judges whether sharing user has permission to access the information by solving following equation to CT,
∑i∈IMiwi=(1,0 ..., 0)
Wherein, MiThe i-th row vector of representing matrix M, { wi∈Zp+i∈lFor constant.If there is one group of solution { wi∈Zp+i∈l,
It then indicates that sharing user has permission to access, then pushes messages to and share user, the transition key of agent side B judges B pairs
The ciphertext CT that A shares has access authority, and message is pushed to B, and C does not have access authority.
Share user in step S5 includes: to the process that information is decrypted
S51. share user B never trusted third party Internet Service Provider place downloading ciphertext CT1, CT；
S52. share the private key SK that user B utilizes oneself, ciphertext CT calculated as follows,
Wherein, L is the t exponent arithmetic for generating member g, Kρ(i)Generation member h corresponding to attribute for function ρ (i) mappingρ(i)
T exponent arithmetic.
To e (g, g)αsFurther calculating can be obtained m ': m '=C/e (g, g)αs, including AES key SecKey and fast
According to Snapshot；
S53. share user B information CT1 is decrypted using AES key SecKey, obtain compressed message PS；
S54. share user B to unzip it compressed message using self-adapting dictionary compress mode, obtain former letter
Breath.
Claims (5)
1. a kind of efficient information push based on mobile self-grouping network and safe sharing method, characterized in that the following steps are included:
S1. system is initialized, and generates public key PK and master key MK；
S2. key generation centre generates the decrypted private key SK and transition key TK of the user according to the attribute of user；
S3. information publisher handles shared picture, video, audio-frequency information m using the lossless compression of self-adapting dictionary, obtains
Compressed information PS, and a snapshot Snapshot is saved, information publisher is using AES symmetric encipherment algorithm to compressed
Information PS is encrypted, and the access structure of set information, and AES key and snapshot Snapshot are added with access structure
It is close, it is uploaded to insincere third party Internet Service Provider；
S4. agent side never trusted third party Internet Service Provider download ciphertext, judge share user access authority whether
Snapshot Snapshot is pushed to if meeting and is shared user by the access control policy for meeting ciphertext；
S5. when sharing user click snapshot Snapshot, then information is decrypted, is decompressed, obtain prime information；
In step s3, information publisher gives out information m, compresses to message, by compressed information PS, snapshot
Snapshot is encrypted, and the process for being uploaded to insincere third party Internet Service Provider includes:
S31. AES key SecKey is randomly generated in information publisher；
S32. information publisher encrypts compressed information PS using AES key SecKey, obtains information ciphertext CT1,
Snapshot Snapshot is generated simultaneously；
S33. information publisher defines the access control policy (M, ρ) of message, and wherein M is the linear privacy sharing square of l row n column
Battle array, for all i=1,2 ... every a line of l, the i-th row of matrix M are identified as the function of ρ (i), ρ be one from
{ 1 ..., l } is mapped to the function of participant set；
S34. random vector is selectedFor every a line of matrix M, from i=1 to i=l, meter
It calculatesWherein MiThe i-th row vector of homography M, sm are the shared information of information publisher, y2..., ynFor Zp
The random number of middle selection,For ZpN random number of middle selection；
S35. information publisher selects random number r according to public key PK, access control policy (M, ρ)1...rl∈Zp, to the close of AES
Key SecKey and snapshot Snapshop encrypts to obtain ciphertext CT, and the key SecKey and snapshot Snapshop of AES are indicated with m ',
S36. CT1, CT are uploaded to insincere third party Internet Service Provider by information publisher together.
2. a kind of efficient information push based on mobile self-grouping network according to claim 1 and safe sharing method,
It is characterized in, in step S1, initialization procedure includes:
S11. key generation centre operation bilinearity parameter generators generate the Bilinear Groups G that two ranks are prime number p1And GT, wherein
E:G1×G1→GTFor Bilinear Pairing operation；
S12. from group G1Middle random selection | U | a element obtains generating first h1..., hU；
S13. random number α is selected1, α2, α ∈ Zp, so that α=(α1+α2) mod p, ZpFor p-1 factorial method prime number group；
S14. system public key PK and master key MK are obtained,
PK=(g, e (g, g)α, gα, h1..., hU), MK=gα
Wherein e (g, g)αIndicate the alpha index operation of Bilinear Pairing, g groups are G1Generation member, gαFor the alpha index fortune for generating member g
It calculates.
3. a kind of efficient information push based on mobile self-grouping network according to claim 1 and safe sharing method,
It is characterized in, the process that private key for user SK and transition key TK is generated in step S2 includes:
S21. in user's registration, key generation centre is that the user distributes globally unique ID；
S22. key generation centre selects random number t ∈ Z according to master key MK, the attribute set S of user and the ID of userp,
Generate the private key of user:
S23. key generation centre generates the conversion private key TK of user:Transition key is transmitted to agent side.
4. a kind of efficient information push based on mobile self-grouping network according to claim 1 and safe sharing method,
It is characterized in that the access authority of user is shared in agent side judgement, the process for carrying out message push includes:
S41. never trusted third party Internet Service Provider gets the ciphertext CT of user to agent side, and agent side is according to user's
Transition key judges whether sharing user has permission to access the information by solving following equation to CT,
∑i∈IMiwi=(1,0 ..., 0)
Wherein, MiThe i-th row vector of representing matrix M, { wi∈Zp}i∈lFor constant, if there is one group of solution { wi∈Zp}i∈l, then table
Show that sharing user has permission to access, then pushes messages to and share user.
5. a kind of efficient information push based on mobile self-grouping network according to claim 1 and safe sharing method,
It is characterized in that share user in step S7 includes: to the process that information is decrypted
S51. share user never trusted third party Internet Service Provider place downloading ciphertext CT1, CT；
S52. share the private key SK that user utilizes oneself, ciphertext CT calculated as follows,
Wherein, L is the t exponent arithmetic for generating member g, Kρ(i)Generation member h corresponding to attribute for function ρ (i) mappingρ(i)T refer to
Number operation；
To e (g, g)αsFurther calculating can be obtained m ': m '=C/e (g, g)αs, including AES key SecKey and snapshot
Snapshot；
S53. share user information CT1 is decrypted using AES key SecKey, obtain compressed message PS；
S54. share user to unzip it compressed message using self-adapting dictionary compress mode, obtain prime information.
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| CN108712379B (en) * | 2018-04-08 | 2021-05-25 | 北京奇艺世纪科技有限公司 | Data pushing method and device |
| US11799634B2 (en) | 2020-09-30 | 2023-10-24 | Qatar Foundation For Education, Science And Community Development | Mesh network for resource-constrained devices |
| CN113225245A (en) * | 2021-04-30 | 2021-08-06 | 深圳沐奇科技有限公司 | Information interaction method for social media platform |
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