With the advent of cloud computing, many organizations and individuals are interested in outsourcing their complex data management to the public cloud for economic savings and ease of access. As sensitive information may have to be encrypted before outsourcing, the data utilization service based on plaintext keyword search is not suitable for the encrypted cloud data. In this paper, we propose ...

We introduce a primitive called Hierarchical Identity-Coupling Broadcast Encryption (HICBE) that can be used for constructing efficient collusion-resistant public-key broadcast encryption schemes with extended properties such as forward-security and keyword-searchability. Our forward-secure broadcast encryption schemes have small ciphertext and private key sizes, in particular, independent of t...

With the continuous development of cloud computing, more and more sensitive data needs to be centrally stored in the cloud storage. For protecting the privacy of data, sensitive data must be encrypted before being outsourced to the server. The traditional PEKS (Public Encryption Keyword Search) enables users to search data by using keywords in the condition of encryption, however, it not only n...

In this paper proposes multi-user searchable encryption with the help of order preserve encryption for providing efficient encrypted data. when proposed these constructions it formally defines the multiuser settings for ranked keyword search by using searchable symmetric encryption and order preserve symmetric encryption. Consider a dataowner is the administrator who can uploads the files befor...

Cloud computing has emerged as a new technology that aims to provide unlimited virtualized resources to clients and enterprises. As services and huge sensitive data are being moved to the cloud server, a new challenge arises as to how to use the migrated data in a way that preserves privacy. Due to privacy concerns, important data should be encrypted before uploading onto cloud servers, so that...

Automatic modelling to search distinguishers with high probability covering as many rounds possible, such MILP, SAT/SMT, CP models, has become a very popular cryptanalysis topic today. In those the optimizing objective is usually or number of distinguishers. If we want recover secret key for round-reduced block cipher, there are two phases, i.e., finding an efficient distinguisher and performin...

In remote data storage system, the information privacy is the main concern of the users. Data confidentiality, keyword search and access control are important characteristics that should be supported in such system. With the advent of quantum computer, number theory related assumptions are vulnerable to quantum attack. In this context, we propose a post-quantum secure searchable encryption sche...

Private information retrieval (PIR) is normally modeled as a game between two players: a user and a database. The user wants to retrieve some item from the database without the latter learning which item is retrieved. Most current PIR protocols are ill-suited to provide PIR from a search engine or large database: (i) their computational complexity is linear in the size of the database; (ii) the...

governance in health is cited as one of the key factors in balancing the concerns of the government and public sector with the interests of civil society/private players, but often remains poorly described and operationalized. richard saltman and antonio duran look at two aspects in the search for new provider models in a context of health markets signalling liberalisation: (i) the role of the ...

Personalized Web Search (PWS) is a search technique for providing better search results, viewing user history, and has been enticing much responsiveness recently. However, effective personalized search requires gathering and accumulating user data, which often raise severe concerns of privacy intrusion for many users. These concerns have become one of the key barriers for organizing personalize...