Constructing identity based schemes is one of the hot topics of current cryptography. Hierarchical identity based cryptography is a generalization of identity based encryption that mirrors an organizational hierarchy. It allows a root public key generator to distribute the workload by delegating public key generation and identity authentication to lower-level public key generators. Currently, t...

More and more companies begin to provide different kinds of cloud computing services for Internet users at the same time these services also bring some security problems. Currently the majority of cloud computing systems provide digital identity for users to access their services, this will bring some inconvenience for a hybrid cloud that includes multiple private clouds and/or public clouds. T...

Identity-based encryption (IBE) [5] and digital signatures are important tools in modern secure communication. In general, identity-based cryptographic methods facilitate easy introduction of public key cryptography by allowing an entity’s public key to be derived from some arbitrary identification value such as an email address or a phone number. Identity-based cryptography greatly reduces the...

Security in mobile ad-hoc networks (MANET's) continues to draw in attention when years of analysis. Recent advances in identity-based cryptography (IBC) sheds light-weight on this drawback and has become widespread as an answer base. In this research it is presenting a comprehensive image and capture the state of the art of IBC security applications in MANET's supported a survey of pu...

Although the Boneh and Franklin identity-based encryption scheme is not overly complex theoretically, the implementation of the system proves to be somewhat difficult. 1 Identity Based Encryption: The difficulty with public key encryption involves distribution of the keys and the assumption that they will always be available (Ding 194). It is not always practical to be connected to a key certif...

Current security model in Global System for Mobile Communications (GSM) predominantly use symmetric key cryptography. The rapid advancement of Internet technology facilitates online trading, banking, downloading, emailing using resource-constrained handheld devices such as personal digital assistants and cell phones. However, these applications require more security than the present GSM support...

Electronic voting protocols proposed to date meet their properties based on Public Key Cryptography (PKC), which offers high flexibility through key agreement protocols and authentication mechanisms. However, when PKC is used, it is necessary to implement Certification Authority (CA) to provide certificates which bind public keys to entities and enable verification of such public key bindings. ...

FullIdent is an identity-based cryptography (IBC) algorithm which is proposed by Boneh and Franklin. In this paper, we give a new identity-based cryptography scheme based on FullIdent. Comparing to FullIdent, our new one concludes three improvements. First, there is no IDMapToPoint function when a sender encrypt message with our scheme. Second, there is no paring operation calculating works dur...

Certificateless public key cryptography was introduced to overcome the key escrow limitation of the identity-based cryptography. It combines the advantages of the identity-based cryptography and the traditional PKI. Recently, Dae Hyun Yum1 and Pil Joong Lee have proposed a generic series construction model of certificateless public key encryption (CL-PKE) which is built from generic primitives:...

Similar to certificateless cryptography, certificate-based cryptography is another novel public key setting which combines the merits of traditional public key cryptography (PKC) and identity-based cryptography (IBC). Both certificateless cryptography and certificate based cryptography do not have the key escrow problem in identity-based cryptography, and greatly reduce the overhead of certific...