Lee and Hwang proposed group-oriented undeniable signature schemes with a trusted center to guard against Langford’s attack. Unfortunately, there are some security weaknesses in Lee-Hwang’s schemes. Their schemes assume that the signers and verifier should honestly perform steps; otherwise their schemes will fail. To remove this impractical assumption and the corresponding problems, our improve...

CONTEXT US soldiers are required to undergo screening for depression, posttraumatic stress disorder (PTSD), and other mental health problems on return from service in Iraq or Afghanistan as part of routine postdeployment health assessments. OBJECTIVE To assess the influence of the anonymity of screening processes on willingness of soldiers to report mental health problems after combat deploym...

Malingering research typically uses analog simulation design or differential prevalence design among "real" patients. Both have been criticized for methodological limitations in external and internal validity, respectively. Samples of simulated malingerers were compared to suspected malingerers to examine generalizability of analog findings. Overall results support the use of simulation designs...

Prosociality is considered a virtue. Those who care for others are admired, whereas those who care only for themselves are despised. For one's reputation, it pays to be nice. Does it pay to be even nicer? Four experiments assess reputational inferences across the entire range of prosocial outcomes in zero-sum interactions, from completely selfish to completely selfless actions. We observed cons...

The City of Yonkers, New York, wound up in a distressing predicament early this year. The municipal budget was running a deficit and the economic crisis was sorely aggravating the problem. Layoffs were needed and among the casualties were six firefighters, including, most regrettably, a young man who’d recently rescued several children from a burning apartment building. The job cuts were due to...

Graphical Abstract “When I was a kid wanted to be honestly scientist … The most challenging part of my job is resisting the urge procrastinate on administrative responsibilities by talking research students. …” Find out more about Wade Petersen in his Introducing Profile.

Social media technologies collapse multiple audiences into single contexts, making it difficult for people to use the same techniques online that they do to handle multiplicity in face-to-face conversation. This article investigates how content producers navigate ‘imagined audiences’ on Twitter. We talked with participants who have different types of followings to understand their techniques, i...

A few months ago, I received an e-mail from IEEE reminding me that could become a Senior Member. I’d them before, and, quite honestly, ignored them. But this time, took heartbeat to think about how much have enjoyed being part of these past several years.