Multipurpose Identity-Based Sign ryption A Swiss Army Knife for Identity-Based Cryptography

Multipurpose Identity-Based Signcryption (A Swiss Army Knife for Identity-Based Cryptography)

Identity-Based (IB) cryptography is a rapidly emerging approach to public-key cryptography that does not require principals to pre-compute key pairs and obtain certificates for their public keys— instead, public keys can be arbitrary identifiers such as email addresses, while private keys are derived at any time by a trusted private key generator upon request by the designated principals. Despi...

Provably secure and efficient identity-based key agreement protocol for independent PKGs using ECC

Key agreement protocols are essential for secure communications in open and distributed environments. Recently, identity-based key agreement protocols have been increasingly researched because of the simplicity of public key management. The basic idea behind an identity-based cryptosystem is that a public key is the identity (an arbitrary string) of a user, and the corresponding private key is ...

Multi Notarized Identity Management in Cloud using Level based Cryptography

Cloud computing is a recently developed with a new technology for complex systems with massivescale services sharing among numerous users. Today most cloud computing system use asymmetric and traditional public key cryptography to provide data security and mutual authentication. Federated Identity Management is a secure single sign-on process between each other and it can enable the portability...

The Exact Security of an Identity Based Signature and its Applications

This paper first positively answers the previously open question of whether it was possible to obtain an optimal security reduction for an identity based signature (IBS) under a reasonable computational assumption. We revisit the Sakai-Ogishi-Kasahara IBS that was recently proven secure by Bellare, Namprempre and Neven through a general framework applying to a large family of schemes. We show t...

Identity-Based En ryption from the Weil Pairing