This work proposes to exploit blockchain technology to define Access Control systems that
guarantee the auditability of access control policies evaluation. The key idea of our proposal …

Data are on Internet-connected devices and the number of these devices is increasing
exponentially, the challenges are also mushrooming for the cyber security experts in …

Online Social Networking has gained huge popularity amongst the masses. It is common for
the users of Online Social Networks (OSNs) to share information with digital friends but in …

In the present era, Online Social Networking has become an important phenomenon in
human society. However, a large section of users are not aware of the security and privacy …

Issuance of cryptocurrencies on top of the Blockchain system by startups and private sector
companies is becoming a ubiquitous phenomenon, inducing the trading of these crypto …

With the rapid increase of threats on the Internet, people are continuously seeking privacy
and anonymity. Services such as Bitcoin and Tor were introduced to provide anonymity for …

Social media platforms that enable users to create and share online content with others are
used increasingly in social research. This article explores the complex ethical issues …

Bitcoin is one of the most influential digital cryptocurrencies in the world, of which the
security is under serious threat. One of the most serious security problems is facing several …

Decentralized ledger-based cryptocurrencies like Bitcoin present a way to construct
payment systems without trusted banks. However, the anonymity of Bitcoin is fragile. Many …

The increasing popularity and diversity of social media sites have resulted in an emergent
number of available social networks. These social networks are now the source of …