In Mobile Ad hoc Networks (MANETs), certification systems play an important role to achieve network security. Handling the issue of certificate revocation in wired network is somewhat easy compared to the MANETs. In wired network when the certificate of a malicious node get revoked then the certificate authorities add the information about the revoked node in to certificate revocation lists (CR...

Broadcast Encryption allows a centre to send information over a broadcast channel to a dynamically changing group of users. The performance is rated by the bandwidth required for the broadcast and the amount of secret information needed to be stored at the user end. It can also be rated by the computational overhead. In the “Stateless Receiver” model, receivers are incapable of storing any new ...

Security is vital for the reliable operation of vehicular ad hoc networks (VANETs). One of the critical security issues is the revocation of misbehaving vehicles. While essential, revocation checking can leak private information. In particular, repositories receiving the certificate status queries could infer the identity of the vehicles posing the query and the target of the query. An importan...

Group signature schemes enable anonymous-yetaccountable communications. Such a capability is extremely useful for applications, such as smartphone-based crowdsensing and citizen science. However, the performance of modern group signature schemes is still inadequate to manage large dynamic groups. In this paper, we design the first provably secure group signature scheme that supports sublinear r...

Right from its very origins the debate on surrogate motherhood has fed own complexity, rather than achieving sure, unambiguous propositions over goodness or inhumanity. This article offers a Simmelian interpretation of this modern form maternity. Through epistemology, author identifies key for overcoming some dilem-mas which have always accompanied otherwise surrogacy: whether it is alienation ...

PURPOSE The aim of this study was to investigate whether progression-free survival (PFS) can be considered a surrogate endpoint for overall survival (OS) in malignant mesothelioma. MATERIALS AND METHODS Individual data were collected from 15 Cancer and Leukemia Group B (615 patients) and 2 North Central Cancer Treatment Group (101 patients) phase II trials. The effects of 5 risk factors for O...

We deal with the problem of a center sending a message to a group of users such that some subset of the users is considered revoked and should not be able to obtain the content of the message. We concentrate on the stateless receiver case, where the users do not (necessarily) update their state from session to session. We present a framework called the Subset-Cover framework, which abstracts a ...

Ciphertext Policy Attribute-Based Encryption (CPABE) has been proposed to implement the attribute-based access control model. In CP-ABE, data owners encrypt the data with a certain access policy such that only data users whose attributes satisfy the access policy could obtain the corresponding private decryption key from a trusted authority. Therefore, CP-ABE is considered as a promising fine-g...

This meticulous inquiry undertakes a critical examination of the intricate confluence betwixt surrogacy and Islamic teachings, plumbing depths ethical legal dimensions that mold perspectives on this modern-day reproductive praxis. Drawing upon wellspring jurisprudence, tenets bioethics, tapestry woven by social cultural contexts, erudite study strives to cast illumination kaleidoscope viewpoint...