CN104967516B - Multi-user's encryption data may compare encryption method and encryption data comparative approach - Google Patents
Multi-user's encryption data may compare encryption method and encryption data comparative approach Download PDFInfo
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- CN104967516B CN104967516B CN201510440040.2A CN201510440040A CN104967516B CN 104967516 B CN104967516 B CN 104967516B CN 201510440040 A CN201510440040 A CN 201510440040A CN 104967516 B CN104967516 B CN 104967516B
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Abstract
The present invention provides a kind of multi-user's encryption data may compare encryption method and encryption data comparative approach.User UjNeed to the data under data type L and user UiWhen the data of the type are compared, user UjRequest is compared in transmission；User UiReceive this and compare request, this compares request if agreeing to, by the label transitional information K of the data typeLiIt is sent to user Uj；UjUsing label transitional information KLiIts label is converted into label TLj, regenerate the comparable encryption data M being comparedLj；To may compare encryption data MLiWith comparable encryption data MLjIt is compared, user UjObtain the comparative result.Realize in the case of need not be to data deciphering, realize under multi-user's difference encryption system, the ciphertext obtained with different encryption keys is compared.
Description
Technical field
The present invention relates to a kind of multi-user's encryption data may compare encryption method and encryption data comparative approach, particularly relate to
And a kind of multi-user's encryption data that process field is shared suitable for data encryption may compare encryption method and encryption data compares
Method.
Background technology
Furukawa proposes comparable encrypted scheme and although solves order-preserving encryption because the cryptogram space is filled at present
The problem of full and leak data information, but can only realize that the ciphertext of secret key cryptography compares.In the big data epoch, user is by number
It is stored according to encryption on Cloud Server.Such as：Multiple medical institutions are stored in Cloud Server after the medical data of oneself is encrypted
On, the data of each medical institutions are respectively with the private key encryption of oneself, and are not intended to it between each medical institutions
The private key of oneself is known by his medical institutions.But many times need to share the progress of some data again between each medical institutions
Medical communication (for example studying some index more than the symptom after some standard), this just need to the encrypted data of different keys into
Row compares, and finds out the medical history record corresponding to the index for meeting needs.Due to, each medical institutions will not reveal the private key of oneself,
Therefore just need study how the algorithm being compared to the encrypted ciphertext of different keys.
In the big data epoch, we will face sizable information content at any time, how manage these information assurances letter
The safety of breath is the matter of utmost importance that we need to solve.At the same time we need it is more efficiently utilize computing resource, carried for user
For various informative data service.
Storage and computing resource due to terminal are limited, and user can not complete the complex and expensive caused to big data operation
Calculating task.Under big data environment, the calculating task of these complex and expensives can only be contracted out to Cloud Server progress by user
Processing, so as to conveniently obtain handling result.However, server gets the private information of user, user in order to prevent
Data will be encrypted.The key during data of different user encryption itself is different, this causes different encipherers to add
Close data are inconvenient by comparison.Many times user is needed compared with the encryption data of other users, but existing
Some schemes can only all realize that the ciphertext under the encryption of same key is compared substantially.Therefore, multi-user environment is furtherd investigate
Under comparable encipherment scheme be the data sharing under big data environment a key technical problem.
The comparison of label always be one it is relatively difficult the problem of, label is compared in order to more convenient
Compared with Agrawal proposes the encrypted scheme of order-preserving first for traditional database, and the program can be in the case of non-decrypting
Encryption data is compared.Then there is the encrypted scheme of many order-preservings to carry again to be suggested, but there are a leakage for order-preserving encryption
Hole, can obtain the order of all labels if label is filled with scope so attacker of some restriction.Boldyreva is carried
The effective encipherment scheme promised to undertake is gone out.Encryption is may then search for be suggested.Although many schemes are suggested, order-preserving adds
Close loophole is again without being solved.Recently, Furukawa proposes comparable encipherment scheme, solves the encrypted loophole of order-preserving
Problem, it is allowed to which encryption data is contracted out to server and is compared by user.But this scheme is symmetric cryptography, can only be realized
Alone user data compares, it is impossible to realizes the comparison of multi-user's label.
The content of the invention
The technical problem to be solved in the present invention is to provide one kind in the case of need not be to data deciphering, multi-user be realized
Under different encryption systems, the encryption data obtained with different encryption keys is compared, and is not easy to be attacked multi-purpose
Family encryption data may compare encryption method and encryption data comparative approach.
The technical solution adopted by the present invention is as follows：
A kind of multi-user's encryption data may compare encryption method, and specific method step is：
Step 1: user UiJudge whether other users are used to compare using the data type L of data is the data
The data type to be announced first under type, is to enter step two, otherwise enters step three；
Step 2: user UiAccording to the random private-key k of oneselfiLThe specific private key K distributed with reference to trusted third party(i)Generation
Label T for the data being comparedLi, can be used in the comparable encryption data M that is comparedLiAnd label transitional information
KLi；
Step 3: user UiAccording to the private key k of data type LiLThe specific private key K distributed with reference to trusted third party(i)Generation
Label T for the data being comparedLi, can be used in the comparable encryption data M that is comparedLiAnd label transitional information
KLi；
, will using the label transitional information of other side when the label is used to need compared with the data of other users
The label of oneself is converted to new label；The new label can generate, and can be carried out with the comparable encryption data of other side
The comparable encryption data compared；
The label transitional information KLiThe label for the other users being compared to needs is changed, and utilization is transformed
The comparable encryption data of label generation can be with comparable encryption data MLiIt is compared.
Preferably, the method further includes：As user UrIt is deleted, in order to prevent user UrData are encrypted again
Comparison, trusted third party distributes new specific private key to other validated users again, and other described validated users obtain
User U is updated after new specific private keyrIt is deleted pervious comparable encryption data, label and label transitional information.
Encryption data comparative approach based on above-mentioned encryption method, specific method are：User UiExternally announce and can be used in
The data type being compared；User UjNeed to the data under data type L and user UiThe data of the type are compared
When, user UjRequest is compared in transmission；User UiReceive this and compare request, this compares request if agreeing to, by the mark of the data type
Sign transitional information KLiIt is sent to user Uj；UjUsing label transitional information KLiThe label for the data for being needed to compare is converted to mark
Sign TLj, then by label TLjThe comparable encryption data M of generationLj, and by label TLjWith comparable encryption data MLjIt is sent to
Cloud Server；Cloud Server utilizes label TLjTo may compare encryption data MLiWith comparable encryption data MLjIt is compared, user
UjObtain the comparative result.
Preferably, user UiBy data type L and its corresponding label transitional information KLiBinding is stored in cloud clothes
It is engaged on device；User UjNeed to the data under data type L and user UiWhen the data of the type are compared, user UjXiang Yun
Server, which is sent, compares request；User UiThis is received by Cloud Server and compares request, this compares request, cloud service if agreeing to
Device is by the label transitional information K of the data typeLiIt is sent to user Uj；UjUsing label transitional information KLiNeeded what is compared
The label of data is converted to label TLj, then by label TLjThe comparable encryption data M of generationLj, and by label TLjWith may compare
Encryption data MLjIt is sent to Cloud Server；Cloud Server utilizes label TLjTo may compare encryption data MLiWith comparable encryption number
According to MLjIt is compared, and comparative result is sent to user Uj。
Preferably, user UiBy data type L and its corresponding label transitional information KLiBound, and it is public
Cloth；User UjNeed to the data under data type L and user UiWhen the data of the type are compared, directly acquire bound
Label transitional information KLi, UjUsing label transitional information KLiNeeded the label switch labels T of data comparedLj, then by
Label TLjThe comparable encryption data M of generationLj, and by label TLjWith comparable encryption data MLjIt is sent to Cloud Server；Cloud
Server by utilizing label TLjTo may compare encryption data MLiWith comparable encryption data MLjIt is compared, and comparative result is sent out
Give user Uj。
Preferably, comparable encryption data MLiWith MLjTo be (c for formt,vt) comparative information, wherein：ctWith
In judging whether the data bit is equal；vtFor judging the magnitude relationship of the bit values in unequal data bit.
Preferably, work as user UrIt is deleted, in order to prevent user UrIt is encrypted the comparison of data again, the credible 3rd
Fang Chongxin distributes new specific private key to other validated users, and other described validated users are obtained after new specific private key more
New user UrIt is deleted pervious comparable encryption data, label and transitional information.
Compared with prior art, the beneficial effects of the invention are as follows：Realize in the case of need not be to data deciphering, it is real
Under existing multi-user's difference encryption system, the ciphertext obtained with different encryption keys is compared, and be not easy to be attacked.
Brief description of the drawings
Fig. 1 is the principle schematic of a wherein embodiment of the invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.
Any feature disclosed in this specification (including summary and attached drawing), unless specifically stated, can be equivalent by other
Or the alternative features with similar purpose are replaced.I.e., unless specifically stated, each feature is a series of equivalent or class
Like an example in feature.
Specific embodiment one
This is specifically encrypted into exemplified by ciphertext compares overall process by ciphertext, by taking one of which effective algorithm as an example, is carried out specific
Illustrate.
Shown in Fig. 1, (to use U in this embodiment with user iiRepresent) and user j (use UjRepresent) pass through cloud service
Platform makes requests on relatively and obtains being described in detail exemplified by comparative result.Each user again can to cloud service platform issue
Before data type for the data being compared, it can be combined according to the private key of the data type L of the data to be issued credible
The label of the specific private key generation encryption data of third party's distribution, can be used in the encryption data that is compared and label conversion letter
Breath；When the label is used to need compared with the data of other users, using the label transitional information of other side, by oneself
Label is converted to new label.The new label can generate, can be compared with the comparable encryption data of other side can
Compare encryption data；The label for the other users that the label transitional information is compared needs is changed, and utilizes conversion
The comparable encryption data of label generation afterwards can be compared with the comparable encryption data of other side.
User UjNeed to the data under data type L and user UiWhen the data of the type are compared, user UjSend
Compare request；User UiReceive this and compare request, this compares request if agreeing to, by the label transitional information K of the data typeLi
It is sent to user Uj；UjUsing label transitional information KLiIts label is converted into label TLj, then by label TLjGeneration is comparable
Encryption data MLj, and by label TLjEncryption data M is may compare with thisLjIt is sent to Cloud Server；Cloud Server utilizes label TLj
To may compare encryption data MLiWith comparable encryption data MLjIt is compared, user UjObtain the comparative result.
Such mode user UiNeed to store label transitional information KLi, UjWill be to UiData need when being compared to
UiRequest is sent, this compares request, U if agreeing toiBy the label transitional information K of the data typeLiIt is sent to user Uj。
In this embodiment, including user, trusted third party (TTP) and cloud service platform.
Trusted third party (TTP) operation key schedule G () produces user UiSpecific private key K(i).TTP's is main
Purposes is to generate a series of keys for meeting certain relation for user, in order to the key conversion between later stage user, is not being had
In the case that user deletes, each user corresponds to a TTP and distributes to the specific private key of oneself.
User UiThe specific private key K of one private key k combinations TTP distribution of random selection(i)Generate label (Token) and label
Transitional information KLi, can pass through label transitional information K to help other usersLiChange out energy and UiEncryption data compare it is comparable
Compared with encryption data.
User UjNeed and UiData when being compared, user UjTo UiRequest is compared in transmission；User UiThis is received to compare
Request, if agreeing to, this compares request, by the label transitional information K of the data typeLiIt is sent to user Uj；Then UjWith reference to Ui
The label transitional information K of announcementLiWith label transfer algorithm T () by the label of oneself be converted into comparing comparable plus
Ciphertext data.
User UiFirst then the data conversion of oneself is generated into comparative information (c into binary systemt,vt), wherein：ctFor
Judge whether the data bit is equal；vtFor judging the magnitude relationship of the bit values in unequal data bit.User UjData turn
Change binary system, combination tag transitional information K intoLiGenerate label Token ', regeneration comparative information (c't,v't), then will
Label Token ', with comparative information (c't,v't) it is sent to Cloud Server；Cloud Server uses comparison algorithm C (), with reference to
Label Token ', by user UjComparative information (c't,v't) and user UiComparative information (ct,vt) be compared.First
Compare c'tWith ctDetermine that who information is different, then pass through more corresponding v'tWith vtTo judge the size of encryption data.
Specific algorithm is：
TTP generates a bilinearity cryptographic system, G, GTThe cyclic group for the p for being for two ranks, the generation member that g is group G are double
Linear Mapping e:G×G→GT.TTP random selections at the same time a, f, s,Announce (G, GT, g, e) and a, f, s, l.Wherein：
A, f, s, l are open parameter,For finite field, (p is prime number here, and following computing is all in finite fieldIn calculating).
TTP selects the non-singular matrix of one 2 × 2With a private key y, then calculateMeet following formula
Son
TTP is randomly choosedMeet t1i+t2i=1mod p, ensure that between user correct key can be carried out
Conversion；Then calculate
Then TTP is calculatedWithValue, and willWithIt is sent to member Ui。
User UiThe data num of oneself is converted into binary system (b firstm-1,…,b1,b0).In user UiReceiveWithAfterwards, calculate Then private key is randomly choosed againCalculate e (g, gy)k
=e (g, g)ky.User UiGenerate the Token of following encryption data
dm=H (e (g, g)ky)H(Y,(0,0λ,0))
di=H (e (g, g)ky)H(Y,(a,di+1,bi))
Wherein, i=m-1, m-2 ..., 1,0；H () is collisionless hash functions, and λ is obtained after being acted on for hash functions
Result length (bit length), 0λIndicate λ 0, H (Y, (0,0λ, 0)) be considered as H (Y | | 0 | | 0λ| | 0), wherein | |
Represent connector.
UiExport the Token, Token=(d of encryption datam,dm-1,…,d1,d0)。
Following UiCalculate ci, eiWith vi.(c hereiFor judging whether the data bit is equal, eiFor protecting every number
According to the bit values on position, viFor protecting eiValue, and for judging that the bit in unequal data bit is worth magnitude relationship)
UiRandom selectionCalculate
ci=H (di,(f,I,0))
ei=H (Y, (s, di+1,0))+bi mod3
vi=H (di+1,(l,I,0))+ei mod3
Then UiBy ciph=(I, (cm,…,c1,c0),(vm-1,…,v1,v0)) it is sent to Cloud Server.
U at the same timeiAnnounce the transitional information of Token
The conversion of Token：If user UjThink and user UiLabel be compared, then UjJust must be by oneself data
Token be converted into can and UiThe Token' that data compare.
UjThe data num' of oneself is first converted into binary system (bm-1',…,b1',b0'), then with the private key of oneselfWith UiAnnounce the transitional information of TokenCalculate
Such UjE (g, g) can be usedkyCan be with U to calculateiThe Token' that data are compared.
dm'=H (e (g, g)ky)H(Y,(0,0λ,0))
di'=H (e (g, g)ky)H(Y,(a,di+1',bi'))
Wherein i=m-1, m-2 ..., 1,0.
UjExport Token'=(dm',…,d1',d0')。
U at the same timejRandom selectionAnd calculate
ci'=H (di', (f, I', 0)),
ei'=H (Y, (s, di+1',0))+bi' mod3,
vi'=H (di+1',(l,I',0))+ei'mod3。
Data compare：UjBy ciph'=(I', (cm',…,c1',c0'),(vm-1',…,v1',v0')) and Token'=
(dm',…,d1',d0') Cloud Server is sent to, ask Cloud Server and UiData be compared.
Cloud Server inverted order first compares (cm',…,c1',c0') and (cm,…,c1,c0) (compare since m, finally
Compare 0), find out first different ct' and ct, then find out corresponding vt' and vtIf (note that ct'=ct, then illustrate
di+1'=di+1, and bi+1'=bi+1).At this time
ej=fj-Hash(dj+1',(s,I,0))mod3
e′j=f 'j-Hash(dj+1',(s,I′,0))mod3
Server calculates again
ej-e′j mod3。
Therefore can obtain as drawn a conclusion：
If ej-e′j=1mod3, then illustrate num>num'；
If ej-e′j=2mod3=-1mod3, then illustrate num<num'.
The addition and deletion of member：
The addition of member：If member UrAdd, TTP random selectionsMeet t1r+t2r=1mod p,
Then calculate
Then TTP is calculatedWithValue, and willWithIt is sent to member Ur。
Such UrCan be according to above step come compared with the encryption data of other users.
The deletion of member：If member UrIt is deleted, in order to prevent UrThe comparison of data is encrypted again, TTP needs
Again distribute new key to other validated users, and validated user obtain new key after need to update UrBefore being deleted
Label label (Token).Carried out respectively from following two step.
TTP updates the private key of legal person：
TTP selects the non-singular matrix of one 2 × 2But y is constant, then calculateMeet following formula
Son
TTP is randomly choosedMeet t1i'+t2i'=1, then calculates
Then TTP is calculatedWithValue, and willWithIt is sent to member Ui(i
≠r)。
Renewal of the validated user to label (Token)：
User UiReceiveWithAfterwards, randomly chooseCalculate e (g, gy)k'=e (g, g)k'y.With
Family UiCalculate A=H (e (g, g)k'y)(H(e(g,g)k'y))-1,
dm*=H (e (g, g)k'y)H(Y,(0,0λ, 0))=H (e (g, g)k'y)(H(e(g,g)k'y))-1dm=A dm
di*=H (e (g, g)k'y)H(Y,(a,di+1,bi))=H (e (g, g)k'y)(H(e(g,g)k'y))-1di=A di
Wherein i=m-2 ..., 1,0.
User can update ciphertext with new Token
Ciph=(I, (cm,…,c1,c0),(vm-1,…,v1,v0))
It is updated to
Ciph*=(I, (cm*,…,c1*,c0*),(vm-1*,…,v1*,v0*)),
Wherein
ci*=H (di*,(f,I,0))
ei*=H (Y, (s, di+1*,0))+bi mod3
vi*=H (di+1*,(l,I,0))+ei mod3。
So deleted user UrIt cannot useWith reference to new transition keyCalculate new
Token：di*。
Because
Equally deleted user UrIt cannot useWith reference to pervious transition keyCalculate
New Token：di*。
Because k' ≠ k.
In this embodiment, d and c are from 0 to m, and e and v is 0 to arrive m-1.In order not to allow attacker directly to find out
The size of data, particularly adds one so that first of the d and c of all data is identical, allows opponent can not by d and c
Directly judge the magnitude relationship of data.
Specific embodiment two
With specific embodiment one difference lies in：User UiBy data type L and its corresponding label transitional information
KLiBreath binding (L, KLi) be stored on Cloud Server；User UjNeed to the data under data type L and user UiThe type
When data are compared, user UjSent to Cloud Server and compare request；User UiThis is received by Cloud Server and compares request,
If agreeing to, this compares request, and Cloud Server is by the label transitional information K of the data typeLiIt is sent to user Uj；UjUsing mark
Sign transitional information KLiIts label is converted into label TLj, then by label TLjThe comparable encryption data M of generationLj, and by label
TLjWith comparable encryption data MLjIt is sent to Cloud Server；Cloud Server utilizes label TLjTo may compare encryption data MLiWith can
Compare encryption data MLjIt is compared, and comparative result is sent to user Uj。
Such mode can reduce user UiAmount of storage (because UiData type L and its corresponding label are turned
Change information KLiBreath binding (L, KLi) be stored on Cloud Server), but the comparison of data still needs request (because user UjTo
Cloud Server, which is sent, compares request；User UiThis is received by Cloud Server and compares request, this compares request, cloud clothes if agreeing to
Device be engaged in by the label transitional information K of the data typeLiIt is sent to user Uj)。
Specific embodiment three
With specific embodiment one, two difference lies in：User UiBy data type L and its corresponding label conversion letter
Cease KLiBound, and announce (L, KLi)；User UjNeed to the data under data type L and user UiThe data of the type
When being compared, bound label transitional information K is directly acquiredLi, UjUsing label transitional information KLiIts label is converted to
Label TLj, then by label TLjThe comparable encryption data M of generationLj, and by label TLjWith comparable encryption data MLjSend
To Cloud Server；Cloud Server utilizes label TLjTo may compare encryption data MLiWith comparable encryption data MLjIt is compared, and
Comparative result is sent to user Uj。
Such mode user UiLabel transitional information K need not be storedLi, and U when comparejNeed not be to UiHair
Send request.
Claims (7)
1. a kind of multi-user's encryption data may compare encryption method, specific method step is：
Step 1: user UiJudge whether other users are used to compare using the data type L of data is under the data type
The data type to be announced first, is to enter step two, otherwise enters step three；
Step 2: user UiAccording to the random private-key k of oneselfiLThe specific private key K distributed with reference to trusted third party(i)Generation is used for
The label T for the data being comparedLi, can be used in the comparable encryption data M that is comparedLiAnd label transitional information KLi；
Step 3: user UiAccording to the private key k of data type LiL' combine the specific private key K that trusted third party distributes(i)Generation is used
In the label T for the data being comparedLi, can be used in the comparable encryption data M that is comparedLiAnd label transitional information KLi；
When the label is used to need compared with the data of other users, the label transitional information K of other side is utilizedLi,
The label of oneself is converted to new label；The new label can generate comparable encryption data；The comparable encryption
Data can be compared with the comparable encryption data of other side；
The label transitional information KLiThe label for the other users being compared to needs is changed, and utilizes transformed label
The comparable encryption data of generation can be with comparable encryption data MLiIt is compared.
2. multi-user's encryption data according to claim 1 may compare encryption method, the method further includes：As user Ur
It is deleted, in order to prevent user UrThe comparison of comparable encryption data is carried out again, and trusted third party gives other legal use again
New specific private key is distributed at family, and other described validated users obtain renewal user U after new specific private keyrBefore being deleted
Comparable encryption data, label and label transitional information.
3. it may compare the encryption data comparative approach of encryption method based on multi-user's encryption data described in claim 1, specific side
Method is：User UiExternally announce the data type that can be used in being compared；User UjNeed to the data under data type L with
User UiWhen the data of the type are compared, user UjRequest is compared in transmission；User UiReceive this and compare request, should if agreeing to
Compare request, then by the label transitional information K of the data typeLiIt is sent to user Uj；UjUsing label transitional information KLiBy its
The label for the data for needing to compare is converted to label TLj, then by label TLjThe comparable encryption data M of generationLj, and by label
TLjWith comparable encryption data MLjIt is sent to Cloud Server；Cloud Server utilizes label TLjTo may compare encryption data MLiWith can
Compare encryption data MLjIt is compared, user UjObtain the comparative result.
4. encryption data comparative approach according to claim 3, user UiBy data type L and its corresponding label
Transitional information KLiBinding is stored on Cloud Server；User UjNeed to the data under data type L and user UiThe type
When data are compared, user UjSent to Cloud Server and compare request；User UiThis is received by Cloud Server and compares request,
If agreeing to, this compares request, and Cloud Server is by the label transitional information K of the data typeLiIt is sent to user Uj；UjUsing mark
Sign transitional information KLiThe label for the data for being needed to compare is converted to label TLj, then by label TLjThe comparable encryption of generation
Data MLj, and by label TLjWith comparable encryption data MLjIt is sent to Cloud Server；Cloud Server utilizes label TLjTo comparable
Compared with encryption data MLiWith comparable encryption data MLjIt is compared, and comparative result is sent to user Uj。
5. encryption data comparative approach according to claim 3, user UiBy data type L and its corresponding label
Transitional information KLiBound, and announced；User UjNeed to the data under data type L and user UiThe data of the type
When being compared, bound label transitional information K is directly acquiredLi, UjUsing label transitional information KLiNeeded what is compared
The label switch labels T of dataLj, then by label TLjThe comparable encryption data M of generationLj, and by label TLjAdd with comparable
Ciphertext data MLjIt is sent to Cloud Server；Cloud Server utilizes label TLjTo may compare encryption data MLiWith comparable encryption data
MLjIt is compared, and comparative result is sent to user Uj。
6. the encryption data comparative approach according to one of claim 3 to 5, may compare encryption data MLiWith MLjIt is for form
(ct,vt) comparative information, wherein：ctFor judging whether the data bit is equal；vtFor judging in unequal data bit
The magnitude relationship of bit values.
7. the encryption data comparative approach according to one of claim 3 to 5, the method further include：As user UrDeleted
Remove, in order to prevent user UrThe comparison of data is encrypted again, trusted third party distributes newly to other validated users again
Specific private key, and other described validated users obtain renewal user U after new specific private keyrPervious may compare is deleted to add
Ciphertext data, label and transitional information.
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| CN106022360B (en) * | 2016-05-11 | 2019-02-01 | 蒋林智 | Two classification method of data based on ciphertext in a kind of statistical learning |
| CN109543434B (en) * | 2018-11-28 | 2020-10-09 | 深圳市墨者安全科技有限公司 | Block chain information encryption method, decryption method, storage method and device |
| CN111628865B (en) * | 2020-04-23 | 2021-06-29 | 平安科技（深圳）有限公司 | Method and device for verifying peer-to-peer relation parameters of encrypted data and storage medium |
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