With mobile computing and powerful laptops, databases with sensitive data can be physically retrieved by malicious users who can employ techniques that were not previously thought of, such as disk scans, compromising the data by bypassing the database management system software or database user authentication processes. Or, when databases are provided as a service, the service providers may not...

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...

With the growing importance of cloud computing, database encryption has become a critical technology to protect data against honest-but-curious attackers. Our goal is to encrypt the data in such a way that it remains protected against powerful attackers and at the same time achieve good performance by processing queries in the cloud without decrypting the data. Order-Preserving Encryption (OPE)...

In the era of big data, graph databases have become increasingly important for NoSQL technologies, and many systems (e.g., online social networks, world-wide web and electrical grids, etc.) can be modeled as graphs for semantic queries. Meanwhile, with the advent of cloud computing, data owners are highly motivated to outsource and store their massive potentially-sensitive graph data on remote ...

Nowadays, users of information systems have inclination to use a central server to decrease data transferring and maintenance costs. Since such a system is not so trustworthy, users' data usually upkeeps encrypted. However, encryption is not a nostrum for security problems and cannot guarantee the data security. In other words, there are some techniques that can endanger security of encrypted d...

Motivated by cloud security concerns, there is an increasing interest in database systems that can store and support queries over encrypted data. A common architecture for such systems is to use a trusted component such as a cryptographic co-processor for query processing that is used to securely decrypt data and perform computations in plaintext. The trusted component has limited memory, so mo...

In today’s environment the various vital information should need to be stored in more secured manner. In the cloud computing, original plain data must be accessible only by trusted parties that do not include internet and cloud providers or intermediaries. Storing this confidential information in cloud must provide guarantee of availability of data and security. there are too many solutions are...

There are a lot of very important data in database, which need to be protected from attacking. Cryptographic support is an important mechanism of securing them. People, however, must tradeoff performance to ensure the security because the operation of encryption and decryption greatly degrades query performance. To solve such a problem, an approach is proposed that can implement SQL query on th...

In the era of big data, graph databases have become increasingly important for NoSQL technologies, and many systems (e.g., online social networks, world-wide web and electrical grids, etc.) can be modeled as graphs for semantic queries. Meanwhile, with the advent of cloud computing, data owners are highly motivated to outsource and store their massive potentially-sensitive graph data on remote ...