Provable Data Possession(PDP)schemes have long been proposed to solve problem of how to check the integrity of data stored in cloud service without downloading.However,with the emerging of network consisting of low pe...Provable Data Possession(PDP)schemes have long been proposed to solve problem of how to check the integrity of data stored in cloud service without downloading.However,with the emerging of network consisting of low performance devices such as Internet of Things,we find that there are still two obstacles for applying PDP schemes.The first one is the heavy computation overhead in generating tags for data blocks,which is essential for setting up any PDP scheme.The other one is how to resist collusion attacks from third party auditors with any possible entities participating the auditing.In this paper,we propose a novel blockchain-based light-weighted PDP scheme for low performance devices,with an instance deployed on a cloud server.We design a secure outsourced tag generating method for low performance devices,which enables a kind of“hash-sign-switch”two-phase tag computing.With this method,users with low performance devices can employ third party auditors to compute modular exponential operations that accounts for the largest portion of computation overhead in tag generation,without leaking their data content.Chaincodes in blockchain network ensure the correctness of such outsourcing and prevent collusion attacks.The security analysis and performance evaluation prove that our scheme is both secure and efficient.展开更多
From the perspective of feminism, by analyzing single intellectual women's living states in enclosed personal spaces, andcomparing their different spatial changes triggered by external intrusions, this essay inten...From the perspective of feminism, by analyzing single intellectual women's living states in enclosed personal spaces, andcomparing their different spatial changes triggered by external intrusions, this essay intends to explore Byatt's ambivalent attitudestowards the feminists' pursuit for a room of one's own, and point out the significance of harmonious co-existence between men andwomen to female identity construction.展开更多
A.S.Byatt's Possession has its own appraisal of public and critic alike for its original structure, as well as for the novelty and complexity of its themes. With Northrop Frye's archetypal criticism, this pape...A.S.Byatt's Possession has its own appraisal of public and critic alike for its original structure, as well as for the novelty and complexity of its themes. With Northrop Frye's archetypal criticism, this paper analyzes the epic poems"The Garden of Proserpina"so as to identify the hidden creation theme from paradise archetype.展开更多
The author of the paper analyzes the story"Glass Coffin"in A. S. Byatt's Possession and compares it with Brothers Grimm's fairy tale with the same name. Through the study, the author identifies the q...The author of the paper analyzes the story"Glass Coffin"in A. S. Byatt's Possession and compares it with Brothers Grimm's fairy tale with the same name. Through the study, the author identifies the quest motif from our modern hero's discovery journey in Possession.展开更多
Currently,there is a growing trend among users to store their data in the cloud.However,the cloud is vulnerable to persistent data corruption risks arising from equipment failures and hacker attacks.Additionally,when ...Currently,there is a growing trend among users to store their data in the cloud.However,the cloud is vulnerable to persistent data corruption risks arising from equipment failures and hacker attacks.Additionally,when users perform file operations,the semantic integrity of the data can be compromised.Ensuring both data integrity and semantic correctness has become a critical issue that requires attention.We introduce a pioneering solution called Sec-Auditor,the first of its kind with the ability to verify data integrity and semantic correctness simultaneously,while maintaining a constant communication cost independent of the audited data volume.Sec-Auditor also supports public auditing,enabling anyone with access to public information to conduct data audits.This feature makes Sec-Auditor highly adaptable to open data environments,such as the cloud.In Sec-Auditor,users are assigned specific rules that are utilized to verify the accuracy of data semantic.Furthermore,users are given the flexibility to update their own rules as needed.We conduct in-depth analyses of the correctness and security of Sec-Auditor.We also compare several important security attributes with existing schemes,demonstrating the superior properties of Sec-Auditor.Evaluation results demonstrate that even for time-consuming file upload operations,our solution is more efficient than the comparison one.展开更多
To check the remote data integrity in cloud computing,we have proposed an efficient and full data dynamic provable data possession(PDP) scheme that uses a SN(serial number)-BN(block number) table to support data...To check the remote data integrity in cloud computing,we have proposed an efficient and full data dynamic provable data possession(PDP) scheme that uses a SN(serial number)-BN(block number) table to support data block update.In this article,we first analyze and test its performance in detail.The result shows that our scheme is efficient with low computation,storage,and communication costs.Then,we discuss how to extend the dynamic scheme to support other features,including public auditability,privacy preservation,fairness,and multiple-replica checking.After being extended,a comprehensive PDP scheme that has high efficiency and satisfies all main requirements is provided.展开更多
“Face to face With Hurricane Camilleisa Piece of narration writ-ten by Joseph P.Blank.It has been adopted by text-book compilers of various countries ever since its first publication in The Readers Digest,March1970.A...“Face to face With Hurricane Camilleisa Piece of narration writ-ten by Joseph P.Blank.It has been adopted by text-book compilers of various countries ever since its first publication in The Readers Digest,March1970.A Searlyas1973,Nat-aliC.展开更多
Progress in cloud computing makes group data sharing in outsourced storage a reality.People join in group and share data with each other,making team work more convenient.This new application scenario also faces data s...Progress in cloud computing makes group data sharing in outsourced storage a reality.People join in group and share data with each other,making team work more convenient.This new application scenario also faces data security threats,even more complex.When a user quit its group,remaining data block signatures must be re-signed to ensure security.Some researchers noticed this problem and proposed a few works to relieve computing overhead on user side.However,considering the privacy and security need of group auditing,there still lacks a comprehensive solution to implement secure group user revocation,supporting identity privacy preserving and collusion attack resistance.Aiming at this target,we construct a concrete scheme based on ring signature and smart contracts.We introduce linkable ring signature to build a kind of novel meta data for integrity proof enabling anonymous verification.And the new meta data supports secure revocation.Meanwhile,smart contracts are using for resisting possible collusion attack and malicious re-signing computation.Under the combined effectiveness of both signature method and blockchain smart contracts,our proposal supports reliable user revocation and signature re-signing,without revealing any user identity in the whole process.Security and performance analysis compared with previous works prove that the proposed scheme is feasible and efficient.展开更多
Cloud storage has been widely used to team work or cooperation devel-opment.Data owners set up groups,generating and uploading their data to cloud storage,while other users in the groups download and make use of it,wh...Cloud storage has been widely used to team work or cooperation devel-opment.Data owners set up groups,generating and uploading their data to cloud storage,while other users in the groups download and make use of it,which is called group data sharing.As all kinds of cloud service,data group sharing also suffers from hardware/software failures and human errors.Provable Data Posses-sion(PDP)schemes are proposed to check the integrity of data stored in cloud without downloading.However,there are still some unmet needs lying in auditing group shared data.Researchers propose four issues necessary for a secure group shared data auditing:public verification,identity privacy,collusion attack resis-tance and traceability.However,none of the published work has succeeded in achieving all of these properties so far.In this paper,we propose a novel block-chain-based ring signature PDP scheme for group shared data,with an instance deployed on a cloud server.We design a linkable ring signature method called Linkable Homomorphic Authenticable Ring Signature(LHARS)to implement public anonymous auditing for group data.We also build smart contracts to resist collusion attack in group auditing.The security analysis and performance evalua-tion prove that our scheme is both secure and efficient.展开更多
Long-lasting insecticide-treated nets (LLINs) and indoor residual spraying (IRS) are the main indoor malaria vector tools control tools. The study examined housing characteristics and investigated the relationship bet...Long-lasting insecticide-treated nets (LLINs) and indoor residual spraying (IRS) are the main indoor malaria vector tools control tools. The study examined housing characteristics and investigated the relationship between the total volume of household possessions, the volume of the sleeping room, and the hanging of LLINs. A total of 831 bedrooms were randomly selected in Benin in 2015. The findings showed that mud walls were predominant in rural areas (more than 75%), while metal roofs were common (77.3% - 97.9%). Battery-powered lighting was prevalent in rural areas in Northern (97%), while open-flame oil lamps were commonly used in rural areas in Southern (86%). The availability of correct bedding was low, ranging from 1% to 10% in all households. 20% of the bedrooms had at least 50% of their volume occupied by household possessions in urban areas. In rural areas, bedrooms without LLINs had a lower mean rate ratio of the volume occupied by possessions per the total volume of the room compared to bedrooms with at least one LLIN installed (p < 0.0001). The characteristics of human habitats are not favourable to the correct use of vector control intervention indoors. It is therefore important to improve people’s living conditions as the next step for malaria elimination.展开更多
Nowadays, an increasing number of persons choose to outsource their computing demands and storage demands to the Cloud. In order to ensure the integrity of the data in the untrusted Cloud, especially the dynamic files...Nowadays, an increasing number of persons choose to outsource their computing demands and storage demands to the Cloud. In order to ensure the integrity of the data in the untrusted Cloud, especially the dynamic files which can be updated online, we propose an improved dynamic provable data possession model. We use some homomorphic tags to verify the integrity of the file and use some hash values generated by some secret values and tags to prevent replay attack and forgery attack. Compared with previous works, our proposal reduces the computational and communication complexity from O(logn) to O(1). We did some experiments to ensure this improvement and extended the model to file sharing situation.展开更多
The first society would be the society of the good will.Already several times discussed,for which the value-oriented life of this year can no longer become an open problem.We define the second society provisionally as...The first society would be the society of the good will.Already several times discussed,for which the value-oriented life of this year can no longer become an open problem.We define the second society provisionally as the one,which is fundamentally not constituted by the above described good will.In the following,we will try to identify it in this abstract description as the society of the“majority”.We see the third society in that political class or elite,which power has been built in the year 1989 and thus became the concretization of that establishment,with which the“first”society identified itself so totally.This tripartition of the real existing Left might also explain,why its political articulation is so fragmented.A Leftist should have today three souls:one of the winners(the elite,as a member of our third class),one of the losers(as a member of our second class)and one of the man of good will(as a member of our first class),who very enjoyed in its total identification with the own system.And authors have drawn some meaningful conclusions.展开更多
We introduce a model for provable data possession (PDP) which allows a client that has stored data at an untrusted server to verify that the server possesses the original data without retrieving it. In a previous work...We introduce a model for provable data possession (PDP) which allows a client that has stored data at an untrusted server to verify that the server possesses the original data without retrieving it. In a previous work, Ateniese et al. proposed a remote data integrity checking protocol that supports data partial dynamics. In this paper, we present a new remote data possession checking protocol which allows an unlimited number of file integrity verifications and efficiently supports dynamic operations, such as data modification, deletion, insertion and append. The proposed protocol supports public verifiability. In addition, the proposed protocol does not leak any private information to third-party verifiers. Through a specific analysis, we show the correctness and security of the protocol. After that, we demonstrate the proposed protocol has a good performance.展开更多
This article determined the cause of social suffering by using set theory and also demonstrated that the cause of any suffering is the emptiness quality of Yang and Ying of the phenomena or“ownership”view and have b...This article determined the cause of social suffering by using set theory and also demonstrated that the cause of any suffering is the emptiness quality of Yang and Ying of the phenomena or“ownership”view and have been given its definition.It described the society free from the basic suffering as named enlightened society or enlightenism like one of the formations of the social development and explained its scientific evidence and described the cause and condition of this society’s evolution and development.展开更多
This paper lays out the morphosyntactic structures of existential,locative and possessive constructions in Amharic.Amharic belongs to South Ethio-Semitic language subfamily.It is natively spoken in the Amhara region a...This paper lays out the morphosyntactic structures of existential,locative and possessive constructions in Amharic.Amharic belongs to South Ethio-Semitic language subfamily.It is natively spoken in the Amhara region and used as the first and the second language for some urban dwellers in the country.It is a working language for the Federal Government of Ethiopia.It serves the same in Gambella,Southern Nations,Nationalities and Peoples’and Benishangul-Gumuz regional states.The Amharic existential,possessive and locative constructions are characterized by using the same existential verb stem all-‘exist’.The verb is defective in its derivation and conjugation.Unlike the prototypical verbs of the language,the existential verb uses a different verb for imperfective and past verb forms.Unlike the regular verbs of the language,the existential verb,which is perfective in form,conveys present tense.It has been observed that indefinite nominals appear as the E(Existent)in existentials and possessives,whereas definite ones appear in locatives.The morphosyntactic features of existentials and locatives are the same in every aspect except the use of definiteness of the E(Existent).The possessives differ from the two constructions in word order and morphological structure of the verb.展开更多
Ownership/private property and property inheritance are concepts well-established and constitutionally protected in our modern societies.Nevertheless,numerous provisions in the national legal framework enable the stat...Ownership/private property and property inheritance are concepts well-established and constitutionally protected in our modern societies.Nevertheless,numerous provisions in the national legal framework enable the states to expropriate individual private goods under certain severe circumstances through compensation prerequisites.The present manuscript presents a short comparative study of the constitutional articles of many countries,regarding expropriation actions,examines the compensation techniques employed,and interrelates expropriation implementation with economic analysis methods and experimental economics.Furthermore,this paper states that the current Greek expropriate methods consist of an economic disturbance and externality in economic terms.展开更多
The remote data integrity auditing technology can guarantee the integrity of outsourced data in clouds. Users can periodically run an integrity auditing protocol by interacting with cloud server, to verify the latest ...The remote data integrity auditing technology can guarantee the integrity of outsourced data in clouds. Users can periodically run an integrity auditing protocol by interacting with cloud server, to verify the latest status of outsourced data. Integrity auditing requires user to take massive time-consuming computations, which would not be affordable by weak devices. In this paper, we propose a privacy-preserving TPA-aided remote data integrity auditing scheme based on Li et al.’s data integrity auditing scheme without bilinear pairings, where a third party auditor (TPA) is employed to perform integrity auditing on outsourced data for users. The privacy of outsourced data can be guaranteed against TPA in the sense that TPA could not infer its contents from the returned proofs in the integrity auditing phase. Our construction is as efficient as Li et al.’s scheme, that is, each procedure takes the same time-consuming operations in both schemes, and our solution does not increase the sizes of processed data, challenge and proof.展开更多
基金The work is supported by the National Key Research and Development Program of China(No.2018YFC1604002)the National Natural Science Foundation of China(Nos.U1836204,U1936208,U1936216 and 62002197).
文摘Provable Data Possession(PDP)schemes have long been proposed to solve problem of how to check the integrity of data stored in cloud service without downloading.However,with the emerging of network consisting of low performance devices such as Internet of Things,we find that there are still two obstacles for applying PDP schemes.The first one is the heavy computation overhead in generating tags for data blocks,which is essential for setting up any PDP scheme.The other one is how to resist collusion attacks from third party auditors with any possible entities participating the auditing.In this paper,we propose a novel blockchain-based light-weighted PDP scheme for low performance devices,with an instance deployed on a cloud server.We design a secure outsourced tag generating method for low performance devices,which enables a kind of“hash-sign-switch”two-phase tag computing.With this method,users with low performance devices can employ third party auditors to compute modular exponential operations that accounts for the largest portion of computation overhead in tag generation,without leaking their data content.Chaincodes in blockchain network ensure the correctness of such outsourcing and prevent collusion attacks.The security analysis and performance evaluation prove that our scheme is both secure and efficient.
文摘From the perspective of feminism, by analyzing single intellectual women's living states in enclosed personal spaces, andcomparing their different spatial changes triggered by external intrusions, this essay intends to explore Byatt's ambivalent attitudestowards the feminists' pursuit for a room of one's own, and point out the significance of harmonious co-existence between men andwomen to female identity construction.
文摘A.S.Byatt's Possession has its own appraisal of public and critic alike for its original structure, as well as for the novelty and complexity of its themes. With Northrop Frye's archetypal criticism, this paper analyzes the epic poems"The Garden of Proserpina"so as to identify the hidden creation theme from paradise archetype.
文摘The author of the paper analyzes the story"Glass Coffin"in A. S. Byatt's Possession and compares it with Brothers Grimm's fairy tale with the same name. Through the study, the author identifies the quest motif from our modern hero's discovery journey in Possession.
基金This research was supported by the Qinghai Provincial High-End Innovative and Entrepreneurial Talents Project.
文摘Currently,there is a growing trend among users to store their data in the cloud.However,the cloud is vulnerable to persistent data corruption risks arising from equipment failures and hacker attacks.Additionally,when users perform file operations,the semantic integrity of the data can be compromised.Ensuring both data integrity and semantic correctness has become a critical issue that requires attention.We introduce a pioneering solution called Sec-Auditor,the first of its kind with the ability to verify data integrity and semantic correctness simultaneously,while maintaining a constant communication cost independent of the audited data volume.Sec-Auditor also supports public auditing,enabling anyone with access to public information to conduct data audits.This feature makes Sec-Auditor highly adaptable to open data environments,such as the cloud.In Sec-Auditor,users are assigned specific rules that are utilized to verify the accuracy of data semantic.Furthermore,users are given the flexibility to update their own rules as needed.We conduct in-depth analyses of the correctness and security of Sec-Auditor.We also compare several important security attributes with existing schemes,demonstrating the superior properties of Sec-Auditor.Evaluation results demonstrate that even for time-consuming file upload operations,our solution is more efficient than the comparison one.
基金Supported by the National Basic"863"Research Program of China(2012CB315901)
文摘To check the remote data integrity in cloud computing,we have proposed an efficient and full data dynamic provable data possession(PDP) scheme that uses a SN(serial number)-BN(block number) table to support data block update.In this article,we first analyze and test its performance in detail.The result shows that our scheme is efficient with low computation,storage,and communication costs.Then,we discuss how to extend the dynamic scheme to support other features,including public auditability,privacy preservation,fairness,and multiple-replica checking.After being extended,a comprehensive PDP scheme that has high efficiency and satisfies all main requirements is provided.
文摘“Face to face With Hurricane Camilleisa Piece of narration writ-ten by Joseph P.Blank.It has been adopted by text-book compilers of various countries ever since its first publication in The Readers Digest,March1970.A Searlyas1973,Nat-aliC.
基金The work is supported by the National Key Research and Development Program of China(No.2018YFC1604002)the National Natural Science Foundation of China(No.U1836204,No.U1936208,No.U1936216,No.62002197).
文摘Progress in cloud computing makes group data sharing in outsourced storage a reality.People join in group and share data with each other,making team work more convenient.This new application scenario also faces data security threats,even more complex.When a user quit its group,remaining data block signatures must be re-signed to ensure security.Some researchers noticed this problem and proposed a few works to relieve computing overhead on user side.However,considering the privacy and security need of group auditing,there still lacks a comprehensive solution to implement secure group user revocation,supporting identity privacy preserving and collusion attack resistance.Aiming at this target,we construct a concrete scheme based on ring signature and smart contracts.We introduce linkable ring signature to build a kind of novel meta data for integrity proof enabling anonymous verification.And the new meta data supports secure revocation.Meanwhile,smart contracts are using for resisting possible collusion attack and malicious re-signing computation.Under the combined effectiveness of both signature method and blockchain smart contracts,our proposal supports reliable user revocation and signature re-signing,without revealing any user identity in the whole process.Security and performance analysis compared with previous works prove that the proposed scheme is feasible and efficient.
基金supported by the National Key Research and Development Program of China(No.2018YFC1604002)the National Natural Science Foundation of China(No.U1836204,No.U1936208,No.U1936216,No.62002197).
文摘Cloud storage has been widely used to team work or cooperation devel-opment.Data owners set up groups,generating and uploading their data to cloud storage,while other users in the groups download and make use of it,which is called group data sharing.As all kinds of cloud service,data group sharing also suffers from hardware/software failures and human errors.Provable Data Posses-sion(PDP)schemes are proposed to check the integrity of data stored in cloud without downloading.However,there are still some unmet needs lying in auditing group shared data.Researchers propose four issues necessary for a secure group shared data auditing:public verification,identity privacy,collusion attack resis-tance and traceability.However,none of the published work has succeeded in achieving all of these properties so far.In this paper,we propose a novel block-chain-based ring signature PDP scheme for group shared data,with an instance deployed on a cloud server.We design a linkable ring signature method called Linkable Homomorphic Authenticable Ring Signature(LHARS)to implement public anonymous auditing for group data.We also build smart contracts to resist collusion attack in group auditing.The security analysis and performance evalua-tion prove that our scheme is both secure and efficient.
文摘Long-lasting insecticide-treated nets (LLINs) and indoor residual spraying (IRS) are the main indoor malaria vector tools control tools. The study examined housing characteristics and investigated the relationship between the total volume of household possessions, the volume of the sleeping room, and the hanging of LLINs. A total of 831 bedrooms were randomly selected in Benin in 2015. The findings showed that mud walls were predominant in rural areas (more than 75%), while metal roofs were common (77.3% - 97.9%). Battery-powered lighting was prevalent in rural areas in Northern (97%), while open-flame oil lamps were commonly used in rural areas in Southern (86%). The availability of correct bedding was low, ranging from 1% to 10% in all households. 20% of the bedrooms had at least 50% of their volume occupied by household possessions in urban areas. In rural areas, bedrooms without LLINs had a lower mean rate ratio of the volume occupied by possessions per the total volume of the room compared to bedrooms with at least one LLIN installed (p < 0.0001). The characteristics of human habitats are not favourable to the correct use of vector control intervention indoors. It is therefore important to improve people’s living conditions as the next step for malaria elimination.
基金supported by Major Program of Shanghai Science and Technology Commission under Grant No.10DZ1500200Collaborative Applied Research and Development Project between Morgan Stanley and Shanghai Jiao Tong University, China
文摘Nowadays, an increasing number of persons choose to outsource their computing demands and storage demands to the Cloud. In order to ensure the integrity of the data in the untrusted Cloud, especially the dynamic files which can be updated online, we propose an improved dynamic provable data possession model. We use some homomorphic tags to verify the integrity of the file and use some hash values generated by some secret values and tags to prevent replay attack and forgery attack. Compared with previous works, our proposal reduces the computational and communication complexity from O(logn) to O(1). We did some experiments to ensure this improvement and extended the model to file sharing situation.
文摘The first society would be the society of the good will.Already several times discussed,for which the value-oriented life of this year can no longer become an open problem.We define the second society provisionally as the one,which is fundamentally not constituted by the above described good will.In the following,we will try to identify it in this abstract description as the society of the“majority”.We see the third society in that political class or elite,which power has been built in the year 1989 and thus became the concretization of that establishment,with which the“first”society identified itself so totally.This tripartition of the real existing Left might also explain,why its political articulation is so fragmented.A Leftist should have today three souls:one of the winners(the elite,as a member of our third class),one of the losers(as a member of our second class)and one of the man of good will(as a member of our first class),who very enjoyed in its total identification with the own system.And authors have drawn some meaningful conclusions.
文摘We introduce a model for provable data possession (PDP) which allows a client that has stored data at an untrusted server to verify that the server possesses the original data without retrieving it. In a previous work, Ateniese et al. proposed a remote data integrity checking protocol that supports data partial dynamics. In this paper, we present a new remote data possession checking protocol which allows an unlimited number of file integrity verifications and efficiently supports dynamic operations, such as data modification, deletion, insertion and append. The proposed protocol supports public verifiability. In addition, the proposed protocol does not leak any private information to third-party verifiers. Through a specific analysis, we show the correctness and security of the protocol. After that, we demonstrate the proposed protocol has a good performance.
文摘This article determined the cause of social suffering by using set theory and also demonstrated that the cause of any suffering is the emptiness quality of Yang and Ying of the phenomena or“ownership”view and have been given its definition.It described the society free from the basic suffering as named enlightened society or enlightenism like one of the formations of the social development and explained its scientific evidence and described the cause and condition of this society’s evolution and development.
文摘This paper lays out the morphosyntactic structures of existential,locative and possessive constructions in Amharic.Amharic belongs to South Ethio-Semitic language subfamily.It is natively spoken in the Amhara region and used as the first and the second language for some urban dwellers in the country.It is a working language for the Federal Government of Ethiopia.It serves the same in Gambella,Southern Nations,Nationalities and Peoples’and Benishangul-Gumuz regional states.The Amharic existential,possessive and locative constructions are characterized by using the same existential verb stem all-‘exist’.The verb is defective in its derivation and conjugation.Unlike the prototypical verbs of the language,the existential verb uses a different verb for imperfective and past verb forms.Unlike the regular verbs of the language,the existential verb,which is perfective in form,conveys present tense.It has been observed that indefinite nominals appear as the E(Existent)in existentials and possessives,whereas definite ones appear in locatives.The morphosyntactic features of existentials and locatives are the same in every aspect except the use of definiteness of the E(Existent).The possessives differ from the two constructions in word order and morphological structure of the verb.
文摘Ownership/private property and property inheritance are concepts well-established and constitutionally protected in our modern societies.Nevertheless,numerous provisions in the national legal framework enable the states to expropriate individual private goods under certain severe circumstances through compensation prerequisites.The present manuscript presents a short comparative study of the constitutional articles of many countries,regarding expropriation actions,examines the compensation techniques employed,and interrelates expropriation implementation with economic analysis methods and experimental economics.Furthermore,this paper states that the current Greek expropriate methods consist of an economic disturbance and externality in economic terms.
基金the National Natural Science Foundation of China under projects 61772150 and 61862012the Guangxi Key R&D Program under project AB17195025+3 种基金the Guangxi Natural Science Foundation under grants 2018GXNSFDA281054 and 2018GXNSFAA281232the National Cryptography Development Fund of China under project MMJJ20170217the Guangxi Young Teachers’ Basic Ability Improvement Program under Grant 2018KY0194and the open program of Guangxi Key Laboratory of Cryptography and Information Security under projects GCIS201621 and GCIS201702.
文摘The remote data integrity auditing technology can guarantee the integrity of outsourced data in clouds. Users can periodically run an integrity auditing protocol by interacting with cloud server, to verify the latest status of outsourced data. Integrity auditing requires user to take massive time-consuming computations, which would not be affordable by weak devices. In this paper, we propose a privacy-preserving TPA-aided remote data integrity auditing scheme based on Li et al.’s data integrity auditing scheme without bilinear pairings, where a third party auditor (TPA) is employed to perform integrity auditing on outsourced data for users. The privacy of outsourced data can be guaranteed against TPA in the sense that TPA could not infer its contents from the returned proofs in the integrity auditing phase. Our construction is as efficient as Li et al.’s scheme, that is, each procedure takes the same time-consuming operations in both schemes, and our solution does not increase the sizes of processed data, challenge and proof.