In 2004, Sekhar proposed a new signature scheme with message recovery. Based on this signature scheme with message recovery, they also proposed a designated verifier signature scheme with non-repudiation of origin and a convertible designated verifier signature scheme with non-repudiation of origin. This paper, however, presents a security analysis where Sekhar’s signature schemes are vulnerabl...

Designated verifier signatures are intended to a specific and unique designated verifier, who is the only one person to check their validity. This paper proposes a new efficient non-delegatable strong designated verifier signature scheme based on identity based cryptography. We analyze the security of the scheme and compare its computational aspects with the other ID-SDVS schemes existing in li...

r. Claude R., born August 13, 1945, consulted for fever yndrome associated with severe dysphagia, respiratory istress, and confusion syndrome with spatiotemporal disrientation. Surgical history comprised a cataract, right rotator cuff ear and right inguinal hernia. There was no history of alcool abuse or smoking. He was not under medication. In emergency unit, he had hyperthermia of 39◦ C assoi...

BACKGROUND AND AIMS Previous studies have found that smoking cessation is associated with a short-term increase in health-care use. This may be because 'sicker' smokers are more likely to stop smoking. The current study assessed the association between smoking cessation and health-care use, adjusting for pre-cessation physical and mental health conditions. DESIGN/SETTING Data came from the AT...

A strong designated verifier signature scheme makes it possible for a signer to convince a designated verifier that she has signed a message in such a way that the designated verifier cannot transfer the signature to a third party, and no third party can even verify the validity of a designated verifier signature. We show that anyone who intercepts one signature can verify subsequent signatures...

This paper looks at some of the domain specific preservation challenges faced by the Archaeology Data Service and how we work with these in order to maximise the re-use potential of the data that we archive. It looks in particular at one of the mandatory responsibilities of an Open Archival Information System (OAIS) and how we try to ensure that the data that we present to our designated commun...

Cancer patients are frequently immunosuppressed and at risk for a wide range of opportunistic and healthcare-associated infections. A good infection prevention program is extremely important to reduce risk of infection. This review focuses on infection prevention measures specific to patients, healthcare personnel, and visitors in the cancer center.

OBJECTIVE Machinists have an increased risk of lung cancer and bladder cancer, and this may be caused by exposure to carcinogenic compounds such as asbestos and polycyclic aromatic hydrocarbons (PAHs) in the engine room. The aim of this study was to investigate the exposure of engine room personnel to PAHs, with 1-hydroxypyrene in urine as a biomarker. METHODS Urine samples from engine room p...

BACKGROUND Smokers undergoing surgery are at a higher risk of complications than non-smokers. Preoperative evaluation by an anesthesiologist could provide an excellent opportunity to promote smoking cessation. Previous surveys of anesthesiologists have found that self-reported smoking cessation counseling rates have room for improvement, but no study has surveyed patients to obtain more accurat...

background: adolescent tobacco use remains a major public health priority to reduce the prevalence of tobacco use in community. the aim of this study was determining the association of the transitions in smoking stages with prevalence of cigarette smoking in the classes and schools in adolescents of tabriz city (northwest of iran). methods: fifty-six high schools were randomly selected, and 490...