Keyphrases
- query processing
- data management
- cloud computing
- big data
- security issues
- relational databases
- database systems
- private cloud
- cloud storage
- data integration
- xml data
- query optimization
- cost model
- index structure
- multidatabase environment
- data center
- data warehousing
- covert channel
- processing queries
- multi party
- lightweight
- database management systems
- cryptographic protocols
- authentication protocol
- xml databases
- security requirements
- aggregate queries
- database query processing
- security protocols
- relational database systems
- security analysis
- security mechanisms
- query execution
- query evaluation
- similarity search
- data processing
- databases
- key management
- encryption scheme
- sensitive data
- materialized views
- database
- r tree
- nearest neighbor