Research And Application Of Efficient Ciphertext Search Mechanism Based On CP-ABE Encryption Algorithm

With the development and application of cloud computing,fog computing and other network technologies,more and more users are beginning to realize the advantages of using personal public data for storage and computing.Taking cloud computing technology as an example,cloud computing technology can ensure the availability and integrity of user data,and provide personalized services,massive resource sharing,and precise consumption according to the use of services according to the needs of each user.Therefore,for this convenient and efficient network technology service architecture,more and more users,enterprises and institutions will entrust their important data to cloud service providers for management.However,for increasing data,how to protect the security and privacy of these data has become an important topic for Internet researchersThe birth and development of the attribute-based encryption technology ABE provides a new personal data protection measure for cloud computing users,which effectively circumvents the shortcomings of traditional encryption technology.However,as more and more users use encryption technology to protect data stored in cloud service providers,a new problem has arisen,namely how to search this data safely,effectively and conveniently.In recent years,various secure ciphertext search mechanisms have been continuously proposed,including the searchable encryption technology(SSE)based on symmetric keys,the public-key encryption technology with keywords search(PEKS),and the searchable encryption technology ABSE based on attribute-based encryption.Because ABE technology itself has many characteristics that traditional encryption technologies do not have,searchable encryption based on ABE technology can perfectly inherit these advantages,such as fine-grained access and anti-collusion.In particular,the attribute-based searchable encryption technology CP-ABSE technology based on the ciphertext policy has good adaptability in network technology fields such as cloud computing,and CP-ABE technology has been widely used in these fields.The research and discussion of a new searchable encryption scheme based on CP-ABE technology is introducedThis article first analyzes the current research status of searchable encryption technology in cloud computing and fog computing,and from a practical point of view,to ensure that the data security is not destroyed,effectively improve the computing efficiency and storage efficiency of the overall scheme The main research contents include the following parts:1.A practical weighted keyword model is proposed in which the keywords are organized and controlled based on weight.The proposal model can efficiently express the matching degree of weighted keywords and ciphertext.2.The search policy with weighted keyword is introduced to provide multi-search mechanism,such as "precise search","Boolean search" and "range search".Each leaf node of search policy can be associated with multiple weighted keywords.Thus,the proposal scheme can further provide range search mechanism.3.An efficient subordinate structure is proposed,which can optimize the searchable policy and ciphertext.The number of weighted keywords can be reduced,and the computational and storage overhead of CP-ABWKS scheme can be saved.4.This paper proposes a searchable LSSS matrix model for the first time.This model can effectively reduce the calculation overhead and storage overhead of the scheme search token and search algorithm,and further optimize the size of the LSSS matrix by using a suitable construction method.5.In order to reduce the computational overhead of the "range" search mechanism,this paper introduces the 0,1-encoding technique.This technology can use a very small amount of binary encoding to represent a large range of queries,thereby greatly reducing the computational and storage overhead required during token generation and ciphertext search.In addition to the above innovations,we found that most attribute-based searchable encryption schemes do not encrypt plaintext files,but only deal with keyword indexes.Therefore,we provide encryption functions for plain text files in order to ensure the integrity of data security.This article concludes our work and looks forward to future research directions and possible scientific research issues.