to download the abstract project

 Your health care provider may be moving from paper records to electronic health records (EHRs) or may be using EHRs already.
 EHRs allow providers to use information more effectively to improve the quality and efficiency of your care, but EHRs will not change the privacy protections or security safeguards that apply to your health information.
 This project focuses on developing secure cloud framework for evolving and accessing trusted computing services in all levels of public cloud deployment model.
 Thus, eliminates both internal and external security threats.

 These results in achieving data confidentiality, data integrity, authentication and authorization, eliminating both active and passive attacks from cloud network environment.
 To develop a secure cloud framework for accessing trusted computing and storage services in all levels of public cloud deployment model.

With the explosive growth of data, it is a heavy burden for users to store the sheer amount of data locally. Therefore, more and more organizations and individuals would like to store their data in the cloud. However, the data stored in the cloud might be corrupted or lost due to the inevitable software bugs, hardware faults and human errors in the cloud. In order to verify whether the data is stored correctly in the cloud, many remote data integrity auditing schemes have been proposed. In remote data integrity
auditing schemes, the data owner firstly needs to generate signatures for data blocks before uploading them to the cloud. These signatures are used to prove the cloud truly possesses these data blocks in the phase of integrity auditing. And then the data owner uploads these data blocks along with their corresponding signatures to the cloud. The data stored in the cloud is often shared across multiple users in many cloud storage applications, such as Google Drive, Dropbox and iCloud. Data sharing as
one of the most common features in cloud storage, allows a number of users to share their data with others. However, these shared data stored in the cloud might contain some sensitive information. For instance, the Electronic Health Records stored and shared in the cloud usually contain patients’ sensitive information (patient’s name, telephone number and ID number, etc.) and the hospital’s sensitive information (hospital’s name, etc.). If these EHRs are directly uploaded to the cloud to be shared for
research purposes, the sensitive information of patient and hospital will be inevitably exposed to the cloud and the researchers. Besides, the integrity of the EHRs needs to be guaranteed due to the existence of human errors and software/hardware failures in the cloud. Therefore, it is important to accomplish remote data integrity auditing on the condition that the sensitive information of shared data is protected. A potential method of solving this problem is to encrypt the whole shared file before sending it to the cloud, and then generate the signatures used to verify the integrity of this encrypted file, finally upload this encrypted file and its corresponding signatures to the cloud. This method can realize the sensitive information hiding since only the data owner can decrypt this file. However, it will make the whole shared file unable to be used by others. For example, encrypting the EHRs of infectious disease patients can protect the privacy of patient and hospital, but these encrypted EHRs cannot be effectively utilized by researchers any more. Distributing the decryption key to the researchers seems to be a possible solution to the above problem. However, it is infeasible to adopt this method in real scenarios due to the following reasons. Firstly, distributing decryption key needs secure channels, which is hard to be satisfied in some
instances. Furthermore, it seems very difficult for a user to know which researchers will use his/her EHRs in the near future when he/she uploads the EHRs to the cloud. As a result, it is impractical to hide sensitive
information by encrypting the whole shared file. Thus, how to realize data sharing with sensitive information hiding in remote data integrity auditing is very important and valuable. Unfortunately, this problem has remained unexplored in previous researches.

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