Private query processing on encrypted databases allows users to obtain data from encrypted databases in such a way that the user’s sensitive data will be protected from exposure. Given an encrypted database, the users typically submit queries similar to the following examples: – How many employees in an organization make over $100,000? – What is the average age of factory workers suffering from...

In this paper, we propose a new idea of searchable medical image encryption method to provide secrecy or authentication when a database is stashed away on a host maintained by a third-party server. This project addresses the trouble of enabling content based image retrieval throughout encrypted medical image dataset. Medical image database is encrypted by the owner of the content before transmi...

Content-based image retrieval (CBIR) has been widely used in many applications. Large storage and computation overheads have made the outsourcing of CBIR services attractive. However, the privacy issues brought by outsourcing have become a big problem. In this paper, a secure CBIR scheme based on an encrypted difference histogram (EDH-CBIR) is proposed. Firstly, the image owner calculates the o...

Data Mining has wide applications in many areas such as medicine, scientific, banking, research and among government agencies. For the past decade, due to the rise of various privacy issues, many theoretical and practical solutions to the classification problem have been proposed under different security models. Classification is one of the commonly used tasks in data mining applications Howeve...

Encrypted database systems provide a great method for protecting sensitive data in untrusted infrastructures. These systems are built using either specialpurpose cryptographic algorithms that support operations over encrypted data, or by leveraging trusted computing co-processors. Strong cryptographic algorithms usually result in high performance overheads (e.g., public-key encryptions, garbled...

We built a system supporting encrypted substring search of a text document. The user can encrypt and upload files to a server. The client can also query the server to ask whether an encrypted file contains a particular string of characters. The query, like the file, is not sent in plaintext but is encrypted or hashed. The server should be able to respond correctly to queries without learning th...

Data confidentiality is concerned in database-as-a-service (DBaaS) model. The cloud server should not have access to user’s plain data. Data is encrypted before they are stored in cloud database. Query computation over encrypted data by the server is not straight-forward. Many research works have been done on this problem. A common goal is to let the server obtain the selection result without l...