We present a new methodology for realizing Ciphertext-Policy Attribute Encryption (CP-ABE)
under concrete and noninteractive cryptographic assumptions in the standard model. Our …

This paper introduces and makes concrete the concept of certificateless public key
cryptography (CL-PKC), a model for the use of public key cryptography which avoids the …

As used herein, the term “personal data'is intended to include data such as identity data and
profile data (for example, preference data and financial data) of a party to which the data …

Digital identities and profiles are precious assets. On one hand they enable users to engage
in transactions and interactions on the Internet. On the other hand, abuses and leakages of …

We investigate a number of issues related to identity based authenticated key agreement
protocols in the Diffie-Hellman family enabled by the Weil or Tate pairings. These issues …

This study investigates the importance of context-awareness and adaptation in mobile
learning. Context-aware mobile learning that senses mobile environment and reacts to …

Proxy signatures are very useful tools when one needs to delegate his/her signing capability
to other party. After Mambo $ et\al. $'s first scheme was announced, many proxy signature …

Ubiquitous computing (ubicomp) demands new security and privacy enhancing
technologies for the new information and communication environments where a huge …

The management of private and confidential information is a major problem for dynamic
organizations. Secure solutions are needed to exchange confidential documents, protect …

This chapter presents a survey of positive applications of pairings in cryptography. We
assume the reader has a basic understanding of concepts from cryptography such as public …