The concept of identity and its formation is one of the most basic notions in the field of social psychology. Many psychologist and sociologists have presented their theories based on this concept and the psychosocial progress of its formation in social contexts. Henry Tajfel, a prominent social psychologist, in his Social Identity Theory has divided an individual’s identity into two parts: “pe...

We give a generic construction for universal designated-verifier signature schemes from a large class, C, of signature schemes. The resulting schemes are efficient and have two important properties. Firstly, they are provably DV-unforgeable, non-transferable and also non-delegatable. Secondly, the signer and the designated verifier can independently choose their cryptographic settings. We also ...

The only known construction of identity-based signatures that can be proven secure in the standard model is based on the approach of attaching certificates to non-identity-based signatures. This folklore construction method leads to schemes that are somewhat inefficient and leaves open the problem of finding more efficient direct constructions. We present the first such construction. Our scheme...

Sakai et. al in 2000 produced a method of construction identity based public/private key pairs using pairings on elliptic curves. In 2001, using the same key construction as Sakai et. al., Boneh and Franklin presented the first efficient and provably secure identity-based encryption scheme. In 2003 Sakai and Kasahara proposed another method of constructing identity based keys, also using pairin...

The subject of this paper is the sport socialization of athletes with disabilities; the object is to contribute to research and praxis through a review of the relevant sociological literature on the subject. The majority of the research, which uses structural-functionalism, is seen as a set of pioneering attempts to generate reliable information. However, the resulting information is too simpli...

In this paper we organize research on work-related identities into a four-perspective typology that captures different ways identities can be “positive.” Each perspective on positive identity—virtue, evaluative, developmental, and structural—highlights a different source of positivity and opens new avenues for theorizing about identity construction. We use these four perspectives to develop pro...