The hybrid signcryption scheme based on certificateless public key cryptography avoids the complexity of certificate management existing in the traditional public key cryptography and the inherent key escrow problem existing in identity-based public key cryptography. The certificateless hybrid signcryption scheme combined with certificateless signcryption key encapsulation mechanism and data en...

This paper describes a secure identity based deniable authentication protocol whose security is based on difficulty of breaking Diffie-Hellman Problem on Elliptic Curve (ECDHP) and hash function. Elliptic curve cryptosystem (ECC) has significant advantages like smaller key sizes, faster computations compared with other public-key cryptography. Since it is an ECC based authentication protocol, i...

Most of the privacy-protection schemes adopting chaotic maps are usually by symmetric cryptography for guaranteeing identity hiding. This will lead to a high calculated amount. So, the paper will wipe out the symmetric cryptography, and only use chaotic maps, a secure one-way hash function to construct a provable privacy-protection system (PPS) which can achieve two kinds of privacyprotection a...

ID-based encryption (or identity-based encryption (IBE)) is an important primitive of ID-based cryptography. As such it is a type of public-key encryption in which the public key of a user is some unique information about the identity of the user (e.g. a user's email address). This can use the text-value of the name or domain name as a key or the physical IP address it translates to. Authentica...

The heterogeneity and relative limited resources of the nodes deployed in hierarchical wireless sensor network (WSN) impose a new strategy to guarantee security and confidentiality. A deployment strategy is proposed and focuses on two different levels: complexity of the scheme and security requirement for the application. Three different cryptography mechanisms may be concurrently used in the s...

The development of Wireless Sensor Networks (WSN) was originally motivated for military applications such as battlefield surveillance. However, in recent years it has gained popularity in many civilian applications: such as habitat monitoring, healthcare, home automation, traffic control and environmental monitoring. As more low cost, low power and multifunctional sensor nodes are being deploye...

Proxy re-encryption is a cryptographic primitive developed to delegate the decryption right from one party (the delegator) to another (the delegatee). In a proxy re-encryption scheme, the delegator assigns a key to a proxy to re-encrypt all messages encrypted with his public key such that the re-encrypted ciphertexts can be decrypted with the delegatee’s private key. We propose a type-and-ident...

Certificateless public key cryptography was introduced to solve the key escrow problem in identity based cryptography while enjoying the most attractive certificateless property. In this paper, we present the first secure certificateless public key encryption (CLPKE) scheme without redundancy. Our construction provides optimal bandwidth and quite efficient decryption process compared with the e...

It has always been a critical issue to find efficient methods for fast revocation of a user’s identity in identity (ID)based cryptosystems. Unfortunately, none of the previous ID-based cryptography can find a practical way. Libert et al. and Baek et al. respectively propose an ID-based mediated encryption scheme based on the practical ID-based encryption scheme from bilinear pairing due to Bone...