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Recently, Chen et al. proposed a certificateless aggregate signature scheme with efficient verification. They claimed that their scheme could resist attacks of Type I adversary and Type II adversary. Unfortunately, we present a universal attack to ...

A proxy re-encryption PRE scheme supports the delegation of decryption rights via a proxy, who makes the ciphertexts decryptable by the delegatee. However, how to structure a chosen-ciphertext secure proxy re-encryption scheme without pair is still an ...

Proxy multi-signature is a scheme that allows a proxy signer to sign messages on behalf of a group of original signers. To our best knowledge, most of the existing proxy multi-signature schemes are proposed in public key infrastructure or identity-based ...

A password-based authenticated group key exchange protocol assists group participants who possess low-entropy, human-memorable passwords in establishing a secure communication channel. In this type of scheme, the server needs to store the users' ...

In a periodic K-times anonymous authentication system, user can anonymously show credential at most K times in one time period. In the next time period, user can automatically get another K-times authentication permission. If a user tries to show ...

We survey the notion of provably secure searchable encryption (SE) by giving a complete and comprehensive overview of the two main SE techniques: searchable symmetric encryption (SSE) and public key encryption with keyword search (PEKS). Since the ...

In 2009, Wu and Lin introduced the concept of self-certified proxy convertible authenticated encryption SP-CAE by integrating self-certified public-key system and designated verifier proxy signature with message recovery. They also presented the first ...

Confidentiality and authenticity are two fundamental security requirement of Public key Cryptography. These are achieved by encryption scheme and digital signatures respectively. Wireless sensor networks are commonly used for critical security tasks ...

Proxy re-signature is proposed by Blaze, Blemmer and Strauss (BBS), in which a semi-trusted proxy acts as a translator converts a signature from Alice into a signature from Bob on the same message. Proxy re-signature is a very useful tool for the ...

Research abounds in the general field of computer security, and the specific area of the system evaluation life cycle. While the importance of this work cannot be overstated, it appears to miss the larger point of creating systems that are inherently ...

By integrating self-certified public-key systems and the designated verifier proxy signature with message recovery, Wu and Lin proposed the first self-certified proxy convertible authenticated encryption (SP-CAE) scheme and its variants based on ...

So far, there exist no two-pass authenticated key exchange protocols which are provably secure in the eCK model and meanwhile achieve perfect forward security against active adversary in one round.

The paper proposes a new two-pass (one round) ...

We provide constructions for key assignment schemes that are provably secure under the factoring assumption in the standard model. Our first construction is for simple "chain" hierarchies, and achieves security against key recovery attacks with a tight ...

At Crypto 2005, Coron et al. introduced a formalism to study the presence or absence of structural flaws in iterated hash functions. If one cannot differentiate a hash function using ideal primitives from a random oracle, it is considered structurally ...

Secure and reliable group communication is an active area of research. Its popularity is caused by the growing importance of group-oriented and collaborative applications. The central research challenge is secure and efficient group key management. In ...

Universal network and pervasive service is one kind of new network architecture. In this architecture, in order to guarantee the security of access network and terminal, access network authentication must be implemented. Universal network terminal ...

This paper presents an efficient solution to the group key exchange problem in the password-based scenario. Our scheme can combine existing group protocols to get a hybrid group key exchange protocol which is efficient in terms of both computation and ...

In this paper, a new construction of hierarchical ID-Based signature (HIBS) scheme is proposed. The new scheme has some advantages over the available schemes: the private keys size shrinks as the identity depth increases and the signature size is a ...

In this paper, a new construction of hierarchical ID-Based signature (HIBS) scheme is proposed. The new scheme has some advantages over the available schemes: the private keys size shrinks as the identity depth increases and the signature size is a ...

Certificateless public key cryptography was introduced to remove the use of certificate to ensure the authentication of the user's public key in the traditional certificate-based public key cryptography and overcome he key escrow problem in the identity-...