Constraint-hiding constrained PRFs (CHCPRFs), initially studied by Boneh, Lewi and Wu [PKC 2017], are constrained PRFs where the constrained key hides the description of the constraint. Envisioned with powerful applications such as searchable encryption, private-detectable watermarking and symmetric deniable encryption, the only known candidates of CHCPRFs are based on indistinguishability obfu...

Pervasive computing applications involve information flow across multiple organizations. Thus, any security breach in an application can have far-reaching consequences. However, effective security mechanisms can be quite different from those typically deployed in conventional applications since these mechanisms are constrained by various factors in a pervasive environment. In this paper, we pro...

Recently, Internet of Things (IoT) has become one of the most developing network environments. Enhancement in electronic and microcontrollers has resulted into increasing number of electric devices which are connected to the internet. Therefore, secure data exchange between IoT devices and other systems is required to prevent any attempts of attacks which can lead to dangerous consequences. Aut...