Learn More
Ciphertext policy attribute based encryption (CPABE) allows a sender to distribute messages based on an access policy which can be expressed as a boolean function consisting of (OR, AND) gates between attributes. A receiver whose secret key is associated with those attributes could only decrypt a ciphertext successfully if and only if his attributes satisfy(More)
—Friendships or social contacts represent an important attribute characterizing one's social position and significantly impact one's daily life. Over online social networks (OSNs), users may opt to hide their social circle, membership or connections to certain individuals or groups for privacy concern. On the other hand, this prohibits a major benefit of(More)
Attribute based proxy re-encryption scheme (ABPRE) is a new cryptographic primitive which extends the traditional proxy re-encryption (public key or identity based cryptosystem) to the attribute based counterpart, and thus empower users with delegating capability in the access control environment. Users, identified by attributes, could freely designate a(More)
An attribute based encryption scheme (ABE) is a cryptographic primitive in which every user is identified by a set of attributes, and some function of these attributes is used to determine the ability to decrypt each ciphertext. Chase proposed the first multi authority ABE scheme in TCC 2007 as an answer to an open problem presented by Sahai and Waters in(More)
This article has been accepted for publication in a future issue of this journal, but has not been fully edited. Content may change prior to final publication. Abstract—Cloud-assisted mobile health (mHealth) monitoring, which applies the prevailing mobile communications and cloud computing technologies to provide feedback decision support, has been(More)
—In distributed collaborative networks such as peer-to-peer systems and wireless ad hoc networks, secure communications , information sharing and dissemination heavily depend on effective trust management. Recently, trust based encryption (TBE) has been proposed to deal with secure information sharing and dissemination for such networks. Unfortunately, the(More)