CN103297225B - A kind of clean culture secret communication method and multicast secret communication method based on identity - Google Patents
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Abstract
The present invention relates to a kind of clean culture secret communication method and multicast secret communication method based on identity, belong to command, control, communications, and information safe practice field. The present invention is based on identification cipher technology and set up secure communication channel, privacy and the security of validated user operation are ensured, key management is simple, system key administrative center only need to be responsible for every user and creates and distribute private key, master key and one group of common parameter file of security centre are managed, the encapsulation taking identity as tagged keys, as long as know that the other side's identify label can realize the secret communication based on cryptographic technique.
Description
Technical field
The present invention relates to a kind of clean culture secret communication method and multicast secret communication method based on identity, belong to logicalLetter and field of information security technology.
Background technology
In today of network technology develop rapidly, communication encryption is the important means that realizes information security. Tradition peaceFull means adopt public key cryptography technology to realize the foundation of certification and safe lane conventionally, but this type systematic relies onPKI/CA(PublicKeyInfrastructure/CertificateAuthority) PKIX, has peaceFull property advantages of higher, but also there is the deficiencies such as key management complexity simultaneously.
For simplifying the cipher key management considerations of conventional public-key system, within 1984, Shamir proposes based on identification cipher IBC(IdentityBasedCryptography) thought: by disclosed subscriber identity information (as e-mail address,IP address, name etc.) as the right PKI part of client public key/private key, private key for user is called private key by oneGeneration person's (PKG) trusted third party generates. PKI/CA technology, direct based on identification cipher system relativelyTaking user's identity information as PKI, management and discriminating that need not public key certificate bring greatly just in applicationProfit. Calendar year 2001, utilize bilinear map to construct an effective base at American scholar Boneh and FranklinIn identity ciphering system, this achievement makes the Remarkable Progress On Electric Artificial progress based on identification cipher. Subsequently, profitWith bilinear map, people also designed some meet specific cryptosystem demand based on identification cipher algorithm, as:Multistage (Hierarchical) based on identity ciphering system, the label dense body system based on identity, the agency based on identitySignature system, blind signature mechanisms, IKE based on identity, etc. From realizing technology, twoLinear Mapping can utilize Weil on elliptic curve and hyperelliptic curve to Tate to constructing, wherein TateTo thering is better implementation efficiency. Relevant research makes the technology that realizes of IBC more ripe efficient.
2006, International Organization for Standardization provided two based on identity in ISO14888-3Signature system standard. IEEE has organized special in identification cipher working group (IEEEP1363.3), and inDuring February 15 to 15 days Augusts in 2006 in 2006, seek the opinion of based on identification cipher draft standard. IETF'sSMIME working group has also started the standardization effort of applying in Email based on identification cipher. The U.S.NIST sets up IBC working group, and announces to adopt the candidate of IBC as protection sensitive information in July, 2008Technology. In above-mentioned work, China has also started the standardized process based on identification cipher. Along with theoretical andRealize reaching its maturity of technology, in the application of security that requires efficient key management and moderate strength, baseCryptographic system in identity can replace PKI/CA system, becomes a new selection that builds information security system.
Summary of the invention
The object of this invention is to provide a kind of clean culture secret communication method and multicast secret communication side based on identityMethod, conventionally adopts and relies on PKI/CA(PublicKeyInfrastructure/Certificate to solve at presentAuthority) public key cryptography technology of PKIX is realized secret communication and is caused asking of key management complexityTopic.
In order to solve the problems of the technologies described above, also provide can a kind of clean culture secret communication method based on identity in the present invention, shouldThe step of clean culture secret communication method is as follows:
1) recipient of unicast communication obtains identity private key D according to identity information ID, D=(s+H1(ID))-1P，S is master key, parameterWherein G1And G2Be respectively adding of q rankMethod cyclic group and multiplication loop group,Be the bilinear map meeting the demands, P is G1Generator, Ppub＝sP，H1And H2For Hash function, wherein
2) transmit leg calls the key encapsulation KEM algorithm Encapsulate based on recipient's identity, and input connectsDebit identifies ID, chooses at random r ∈ Zq, calculate t=H3(r)，CalculateR＝t(Ppub+H1(ID)P)，key＝H4(r), whereinH3,H4For Hash function, output sends recipient to and is used for information (R, v) and this locality of session key generation and addsClose session key key;
3) transmit leg, to message m, calls symmetric encipherment algorithm and with session key key, m is encryptedC=Enc (m, key), sends to recipient by (c, (R, v));
4) recipient calls key deblocking algorithm key=Decapsulate (D, (R, v)), input recipient private key D(R, v), output decrypted session key key: calculate Calculatet＝H3(r), if R=t is (Ppub+H1(ID) P), export key=H4(r), taking key as session key to closeLiterary composition c is decrypted m=Dec (c, key), obtains clear-text message m, and transmit leg has completed maintaining secrecy to message mCommunication.
In described step 1), the process of recipient's private key D is as follows:
A. recipient submits to security centre by self identity information ID and registers, and security centre accepts registrationRequest, and the identity information in registration request is submitted to key server;
B. key server generates identity private key D according to identity information ID and system master key s, believes by safetyRoad returns to security centre, and security centre returns to recipient by identity private key D by safe lane.
The present invention also provides a kind of multicast secret communication method based on identity for solving the problems of the technologies described above, shouldThe step of multicast secret communication method is as follows:
1) recipient of multi-casting communication is according to identity information ID separately1,ID2,...,IDnObtain respectively identity private keyD1,D2,...,Dn，Di＝(s+H1(IDi))-1P, s is master key, parameterWherein G1And G2The addition cyclic group and the multiplication that are respectively q rank followRing group,Be the bilinear map meeting the demands, P is G1Generator, Ppub＝sP，H1And H2For Hash function, wherein
2) transmit leg calls the many recipients key encapsulation algorithm based on based on identityMulti-Encapsulate(ID1,ID2,...,IDn), input recipient identifies ID1,ID2,...,IDn, choose at randomr∈Zq, calculate t=H3(r)，Calculate Ri＝t(Ppub+H1(IDi)P)，i＝1,2,...,n，key＝H4(r), whereinH3,H4ForHash function, output sends recipient to and is used for the information { (ID of session key generationi,Ri,vi)}i＝1,...nAnd this localityEncrypted session key key;
3) transmit leg, to message m, calls symmetric encipherment algorithm and with session key key, m is encryptedC=Enc (m, key), by (c, { (IDi,Ri,vi)}i＝1,...,n) send to each recipient as multicast message;
4) recipient IDiReceive after multicast message, call multicast key deblocking algorithmkey＝Multi-Decapsulate(Di,{(IDi,Ri,vi)}i＝1,...,n), input recipient IDiCorresponding private keyDi, according to self IDiMate corresponding (IDi,Ri,vi), calculate MeterCalculate t=H3(r), if Ri＝t(Ppub+H1(IDi) P), export key=H4(r), taking key as session keyCiphertext c is decrypted to m=Dec (c, key), obtains clear-text message m, transmit leg has completed and recipient coupleThe secret communication of message m, in like manner, each recipient obtains the cleartext information that transmit leg sends, thereby completesWhole multicast coded communication process.
The recipient ID of multi-casting communication in described step 1)1,ID2,...,IDnObtain each self-corresponding recipient's private keyD1,D2,...,DnProcess as follows:
A. the recipient of multi-casting communication is by self identity information ID1,ID2,...,IDnSubmitting to security centre notesVolume, security centre accepts registration request, and the identity information in registration request is submitted to key server;
B. key server is according to identity information ID1,ID2,...,IDnGenerate body separately with system master key sPart private key D1,D2,...,Dn, returning to security centre by safe lane, security centre is by identity private keyD1,D2,...,DnReturn to each recipient of corresponding multi-casting communication by safe lane. Of the present invention usefulEffect is: the present invention is based on identification cipher technology and set up secure communication channel, ensured validated user operation privacy andSecurity, key management is simple, and system key administrative center only need to be responsible for every user and creates and distribute private key, managesThe master key of good security centre and one group of common parameter file, the encapsulation taking identity as tagged keys, as long as know the other side'sIdentify label can realize the secret communication based on cryptographic technique.
Brief description of the drawings
Fig. 1 is based on identification cipher system architecture diagram in the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further.
The present invention proposes a kind of clean culture secret communication method and multicast secret communication method based on identity, utilizes basePrivacy and the security of validated user operation have been ensured in identification cipher. With traditional PKI/CA technology mechanism notWith, in based on identification cipher system with the disclosed identity information of user (as e-mail address, IP address, nameEtc.) as the right PKI part of client public key/private key, private key for user is called private key generation person (PKG) by oneTrusted third party generate. One based on identification cipher system as shown in Figure 1, by security centre and groups of usersBecome, security centre provides cipher key management services to user, and user is utilizing security password algorithm to realize key encapsulationDeng crypto-operation and processing. Obtain after identity private key, between application server and user, user, just can utilizeIdentity private key carries out the secret communication based on identity.
The embodiment of a kind of clean culture secret communication method based on identity of the present invention
Concrete scheme and step are as follows:
1. the recipient of unicast communication submits to security centre by identity information ID and registers, and security centre acceptsRegistration request, and the identity information in registration request is submitted to key server, key server is according to this bodyPart Information ID and system master key s generate identity private key D, D=(s+H1(ID))-1P, s is master key, parameterWherein G1And G2Be respectively the addition cyclic group on q rank and take advantage ofMethod cyclic group,Be the bilinear map meeting the demands, P is G1Generator, Ppub＝sP，H1And H2For Hash function, wherein Key server is by bodyPart private key D returns to recipient ID by safe lane.
2) transmit leg calls the key encapsulation KEM algorithm Encapsulate based on recipient's identity, and input connectsDebit identifies ID, chooses at random r ∈ Zq, calculate t=H3(r)，CalculateR＝t(Ppub+H1(ID)P)，key＝H4(r), whereinH3,H4For Hash function, output sends recipient to and is used for information (R, v) and this locality of session key generation and addsClose session key key.
3) transmit leg, to message m, calls symmetric encipherment algorithm and with session key key, m is encryptedC=Enc (m, key), sends to recipient by (c, (R, v)).
4) recipient calls key deblocking algorithm key=Decapsulate (D, (R, v)), input recipient private key D(R, v), output decrypted session key key: calculate Calculatet＝H3(r), if R=t is (Ppub+H1(ID) P), export key=H4(r), taking key as session key to closeLiterary composition c is decrypted m=Dec (c, key), obtains clear-text message m, and transmit leg has completed the clean culture to message mSecret communication.
The embodiment of a kind of multicast secret communication method based on identity of the present invention
1. the recipient of multi-casting communication is by identity information ID separately1,ID2,...,IDnSubmit to respectively security centreRegister, security centre accepts registration request, and the identity information in registration request is submitted to cipher key serviceDevice, key server basis identity information ID separately1,ID2,...,IDnGenerate respectively and generate with system master key sCorresponding identity private key D separately1,D2,...,Dn，Di＝(s+H1(IDi))-1P, s is master key, parameterWherein G1And G2Be respectively the addition cyclic group on q rank and take advantage ofMethod cyclic group,Be the bilinear map meeting the demands, P is G1Generator, Ppub＝sP，H1And H2For Hash function, wherein Key server generatesIdentity private key D1,D2,...,Dn, returning to security centre by safe lane, security centre is by identity private keyD1,D2,...,DnReturn to each recipient of corresponding multi-casting communication by safe lane.
2 transmit legs call the many recipients key encapsulation algorithm based on based on identityMulti-Encapsulate(ID1,ID2,...,IDn), input recipient identifies ID1,ID2,...,IDn, choose at randomr∈Zq, calculate t=H3(r)，Calculate Ri＝t(Ppub+H1(IDi)P)，i＝1,2,...,n，key＝H4(r), whereinH3,H4ForHash function, output sends recipient to and is used for the information { (ID of session key generationi,Ri,vi)}i＝1,...nAnd this localityEncrypted session key key.
3 transmit legs, to message m, call symmetric encipherment algorithm and with session key key, m are encryptedC=Enc (m, key), by (c, { (IDi,Ri,vi)}i＝1,...,n) send to each recipient as multicast message.
4 recipient IDiReceive after multicast message, call multicast key deblocking algorithmkey＝Multi-Decapsulate(Di,{(IDi,Ri,vi)}i＝1,...,n), input recipient IDiCorresponding private keyDi, according to self IDiMate corresponding (IDi,Ri,vi), calculate MeterCalculate t=H3(r), if Ri＝t(Ppub+H1(IDi) P), export key=H4(r), taking key as session keyCiphertext c is decrypted to m=Dec (c, key), obtains clear-text message m, transmit leg has completed and recipient coupleThe secret communication of message m, in like manner, each recipient obtains the cleartext information that transmit leg sends, thereby completesWhole multicast coded communication process.
Claims (4)
1. the clean culture secret communication method based on identity, is characterized in that: this clean culture secret communication methodStep as follows:
1) recipient of unicast communication obtains identity private key D according to identity information ID, D=(s+H1(ID))-1P，S is master key, parameterWherein G1And G2Be respectively adding of q rankMethod cyclic group and multiplication loop group,Be the bilinear map meeting the demands, P is G1Generator, Ppub＝sP，H1And H2For Hash function, wherein
2) transmit leg calls the key encapsulation KEM algorithm Encapsulate based on recipient's identity, with identityCarry out key encapsulation for mark, input recipient identifies ID, chooses at random r ∈ Zq, calculate t=H3(r)，Calculate R=t (Ppub+H1(ID)P)，key＝H4(r), whereinH3,H4For Hash function, output sends recipient to and is used for session key generationInformation (R, v) and local cipher session key key;
3) transmit leg, to message m, calls symmetric encipherment algorithm and with session key key, m is encryptedC=Enc (m, key), sends to recipient by (c, (R, v));
4) recipient calls key deblocking algorithm key=Decapsulate (D, (R, v)), input recipient private key D(R, v), output decrypted session key key: calculateCalculatet＝H3(r), if R=t is (Ppub+H1(ID) P), export key=H4(r), taking key as session key to closeLiterary composition c is decrypted m=Dec (c, key), obtains clear-text message m, and transmit leg has completed maintaining secrecy to message mCommunication.
2. the clean culture secret communication method based on identity according to claim 1, is characterized in that: described inStep 1) in the process of recipient's private key D as follows:
A. recipient submits to security centre by self identity information ID and registers, and security centre accepts registrationRequest, and the identity information in registration request is submitted to key server;
B. key server generates identity private key D according to identity information ID and system master key s, believes by safetyRoad returns to security centre, and security centre returns to recipient by identity private key D by safe lane.
3. the multicast secret communication method based on identity, is characterized in that: this multicast secret communication methodStep as follows:
1) recipient of multi-casting communication is according to identity information ID separately1,ID2,...,IDnObtain respectively identity private keyD1,D2,...,Dn，Di＝(s+H1(IDi))-1P, s is master key, parameterWherein G1And G2The addition cyclic group and the multiplication that are respectively q rank followRing group,Be the bilinear map meeting the demands, P is G1Generator, Ppub＝sP，H1And H2For Hash function, wherein
2) transmit leg calls the many recipients key encapsulation algorithm based on identityMulti-Encapsulate(ID1,ID2,...,IDn), carry out key encapsulation taking identity as mark, input recipient markKnow ID1,ID2,...,IDn, choose at random r ∈ Zq, calculate t=H3(r)，CalculateRi＝t(Ppub+H1(IDi)P)，i＝1,2,...,n，key＝H4(r), whereinH3,H4For Hash function, output sends recipient to and is used for session key generationInformation { (IDi,Ri,vi)}i＝1,...nWith local cipher session key key;
3) transmit leg, to message m, calls symmetric encipherment algorithm and with session key key, m is encryptedC=Enc (m, key), by (c, { (IDi,Ri,vi)}i＝1,...,n) send to each recipient as multicast message;
4) recipient IDiReceive after multicast message, call multicast key deblocking algorithmkey＝Multi-Decapsulate(Di,{(IDi,Ri,vi)}i＝1,...,n), input recipient IDiCorresponding private key Di, according to self IDiMate corresponding (IDi,Ri,vi), calculateMeterCalculate t=H3(r), if Ri＝t(Ppub+H1(IDi) P), export key=H4(r), taking key as session keyCiphertext c is decrypted to m=Dec (c, key), obtains clear-text message m, transmit leg has completed and recipient coupleThe secret communication of message m, in like manner, each recipient obtains the cleartext information that transmit leg sends, thereby completesWhole multicast coded communication process.
4. the multicast secret communication method based on identity according to claim 3, is characterized in that: described inStep 1) in the recipient ID of multi-casting communication1,ID2,...,IDnObtain each self-corresponding recipient's private keyD1,D2,...,DnProcess as follows:
A. the recipient of multi-casting communication is by self identity information ID1,ID2,...,IDnSubmitting to security centre notesVolume, security centre accepts registration request, and the identity information in registration request is submitted to key server;
B. key server is according to identity information ID1,ID2,...,IDnGenerate identity private key separately with system master key sD1,D2,...,Dn, returning to security centre by safe lane, security centre is by identity private key D1,D2,...,DnLogicalCross each recipient that safe lane returns to corresponding multi-casting communication.
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| CN103929299B (en) * | 2014-04-28 | 2017-05-10 | 王小峰 | Self-securing lightweight network message transmitting method with address as public key |
| CN104717074B (en) * | 2015-04-02 | 2019-06-25 | 东南大学 | A kind of shared key safety communicating method merging private information |
| SG10201504240VA (en) * | 2015-05-29 | 2016-12-29 | Huawei Internat Pte Ltd | A method and system for secure sms communications |
| CA3113488A1 (en) | 2015-11-17 | 2017-05-26 | Huawei Technologies Co., Ltd. | Method and apparatus for video coding |
| CN109218016B (en) * | 2017-07-06 | 2020-05-26 | 北京嘀嘀无限科技发展有限公司 | Data transmission method and device, server, computer equipment and storage medium |
| CN111600711A (en) * | 2017-07-06 | 2020-08-28 | 北京嘀嘀无限科技发展有限公司 | Encryption and decryption system and encryption and decryption method for fine-grained mobile access |
| CN114627580B (en) * | 2022-03-11 | 2023-10-27 | 青岛海信智慧生活科技股份有限公司 | Intelligent door lock, state reporting method thereof and household equipment linkage system |
| CN118282778B (en) * | 2024-05-31 | 2024-07-26 | 电科云(北京)科技有限公司 | Key management method, data transmission method and system for computing nodes in multi-computing base |
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