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The concept of certificateless public key cryptography (CL-PKC) was introduced by Al-Riyami and Paterson. Such a cryptosystem does not suffer from the key escrow problem while avoiding the onerous management of certificates. In this paper, we present the first certificateless undeniable signature scheme. We consider two different types of adversaries and(More)
BCL6 is the product of a proto-oncogene implicated in the pathogenesis of human B-cell lymphomas. By binding specific DNA sequences, BCL6 controls the transcription of a variety of genes involved in B-cell development, differentiation and activation. BCL6 is overexpressed in the majority of patients with aggressive diffuse large B-cell lymphoma (DLBCL), the(More)
In this paper, we first construct a security model for delegation-by-warrant ID-based proxy signcryption schemes and formalize notions of security for them. To the best of our knowledge, no related work has been done. Then we present such a scheme based on the bilinear pairings, and show that it is provably secure in the random oracle model. Specifically,(More)
Research Online is the open access institutional repository for the University of Wollongong. For further information contact the UOW Abstract We initiate the formal study on authenticated key exchange (AKE) under bad randomness. This could happen when (1) an adversary compromises the randomness source and hence directly controls the randomness of each AKE(More)
We introduce Partial Signatures, where a signer, given a message, can compute a " stub " which preserves her anonymity, yet later she, but nobody else, can complete the stub to a full and verifiable signature under her public key. We provide a formal definition requiring three properties, namely anonymity, unambiguity and unforgeability. We provide schemes(More)
Key insulation (KI) and Intrusion resilience (IR) are methods to protect a user's key against exposure by utilizing periodic communications with an auxiliary helper. But existing work assumes a secure channel between user and helper. If we want to realize KI or IR in practice we must realize this secure channel. This paper looks at the question of how to do(More)
Ischemic stroke is one of the leading causes of mortality and disability worldwide. Previous studies have indicated that hyperbaric oxygen preconditioning (HBO-PC) can induce neuroprotection against focal cerebral ischemia. However, the underlying mechanisms are still not fully understood, and the optimal regimen for preconditioning must be confirmed. In(More)
Type 2 diabetes mellitus (T2DM) has been associated with cognitive impairment. However, its neurological mechanism remains elusive. Combining regional homogeneity (ReHo) and functional connectivity (FC) analyses, the present study aimed to investigate brain functional alterations in middle-aged T2DM patients, which could provide complementary information(More)