Key management for encrypted broadcast

Private Key based query on encrypted data

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...

Secret-Public Storage Trade-Off for Broadcast Encryption Key Management

Distributed Key Generation for Secure Encrypted Deduplication

Large-scale storage systems often attempt to achieve two seemingly conflicting goals: (1) the systems need to reduce the copies of redundant data to save space, a process called deduplication; and (2) users demand encryption of their data to ensure privacy. Conventional encryption makes deduplication on ciphertexts ineffective, as it destroys data redundancy. A line of work, originated from Con...

Efficient Multi-dimensional Key Management in Broadcast Services

The prevalent nature of Internet makes it a well suitable medium for many new types of services such as location-based services and streaming content. Subscribers to such services normally receive encrypted content and can obtain access to it if they possess the corresponding decryption key. Furthermore, in location-based services a subscription is normally granted to a geographic area specifie...

Broadcast Group Key Management with Access Control Vectors

Secure collaborative applications currently enabled by the Internet need flexible and efficient mechanisms for managing and distributing group keys. The secure transmission of information among collaborating users should be efficient as well as flexible in order to support access control models with different granularity levels for different kinds of applications such as secure group communicat...