Research On The Short Cipher Text Retrieval Technology Based On The Attribute Encryption

Short text refers to the text of which characters are less than 160.It appearsfrequently in instant messaging,chat software,forums,micro blogging and other applications.With the rapid development of third-party storage technology such as cloud serviceand increased information sharing requirements,more and moreshort text messages are stored in third-party storage mechanism,including sensitive information.Therefore,we need to encrypt the information.However,the encrypted information plaintext loses some features,which slows down the retrieval of text.Cipher text retrieval has become a key technologytoaccess information.By query keyword submitted by the user,the cipher text retrieval technology can quickly retrieve the corresponding short text cipher text,thereby reducing the time to search a short text message from the cipher text.However,due to the limits of the short text itself,the traditional cipher text retrieval technology cannot be applied directly to short text cipher retrieval.Constructing a text cipher retrieval technology that is suitable for short text becomes one of the challenging issues.According to our analysis,thisthesiscomplete the following work:(1)Attribute encryption technology is an access control-based encryption,sharing of short text cipher textcan be achieved with the access control.This paper first provides an improved attribute encryption schemeand extended the short text basic model.And then,based on the above improvements,Construct an attributes short text encryption scheme based on short text expansion model and the improved attribute encryption scheme.(2)Based on the characteristics of the short text,this paper first proposes a new vector space model,which is suitable for short text application,and uses attribute encryption algorithm to encrypt short text.Then,this paper constructs a cipher text retrieval programsuited for short text.(3)A lot of experiments have been carried out on the above two schemes,which verify the reliability and validity of the improved scheme.Experiment shows: The above scheme can effectively ensure the security of the cipher text,and it can be accessed by multiple users with the same cipher text.And using the CP-ABE encryption algorithm to encrypt the key words in the index structure,it can realize different query users can access the same key words at the same time,to achieve the needs of users in the multi user environment.