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allowing access to a certain oracle beforehand. Our results allow for contributing to a variety of open problems such as the IND-CCA1 security of Paillier’s scheme, or the use of linear codes in group homomorphic encryption. Furthermore, we design a new cryptosystem which provides features that are unique

domain of our eco-social system is thereby transformed. We live in a new economy, characterized by three fundamental features. First, it is informational , that is, the capacity of generating knowledge and processing/managing information determine the productivity and competitiveness of all kinds

In this paper explanation strategy quality Based Encryption scheme is used to control unauthorized access. In addition revocation scheme is used for time based file assured deletion. addresses this open issue by, on one hand, characterizing and implementing access policies based on data qualities

Abstract—We consider the primitive of restricted oblivious transfer: the owner of a database wants to restrict the access of users to this data according to some policy, whereas a legitimate user wants to privately retrieve allowed parts of the data, without letting the owner know which part

Information systems security issues are currently being addressed using different techniques, such as authentication, encryption and access control, through the definition of security policies, but also using monitoring techniques, in particular intrusion detection systems. We can observe

the performance of aggregating the bandwidth of increasingly heterogeneous links. In this paper we examine the end-to-end performance of a single TCP connection with packets transmitted over multiple heterogeneous links. We describe a testbed we constructed, present empirical results, and introduce a new Linux

, to restrict the homomorphic operations that may be performed. We also present a variant of the Groth-Ostrovsky-Sahai NIZK, and new anonymous IBE, signature, and encryption schemes. 1

in our Data sharing archetypes. Cipher text policy attributebased encryption (CP-ABE) is appropriate a capable cryptographic solution to this problem. Our CP-ABE facilitates the data owners to characterize their individual access policy over user attributes and implement the policies on the data

IOS Press Utilization of intelligent agents for supporting citizens in their access to e-government services 1