Abstract:
In the current age of information communication, security is one of the most important
concern which is attracting a lot of attention from the research community. Cryptography
is a pivotal method to offer security to communication of various information. Authentication
and key establishment protocols are cryptographic techniques that are the first steps
to set up a secure communication by authenticating the users involved and establishing
a secure key among them. The key can subsequently be used to offer various security
services. In this thesis various new protocols for authentication and key establishment are
proposed in order to enhance efficiency and security of communication.
In the design of key establishment protocols, the use of cryptographic primitives requiring
less computations are preferred to increase efficiency. Particularly, due to the
popularity of applications in heterogeneous environments, protocols having less computational
burden on the low power users have become essential. One of the design goals of
the protocols proposed in the thesis is to provide an asymmetric computational pattern to
enhance the overall efficiency. The security analysis of the protocols have been performed
under provable security model.
