It is understandable that Security Dynamics is sensitive to any article that is critical of their SecurID card. After all, their success is based on their cus-tomers' confidence that their one-time password scheme is unbreakable. Thus, it appears to me that they read my article in Computing Systems with an overþ-sensitive eye and misunderstood some of it. In this response, I will try to clarify...

The N-body problem is to simulate the motion of N particles under the influence of mutual force fields based on an inverse square law. The problem has applications in several domains including astrophysics, molecular dynamics, fluid dynamics, radiosity methods in computer graphics and numerical complex analysis. Research efforts have focused on reducing the O(iV^) time per iteration required by...

The efficacy of syntactic features for topic-independent authorship attribution is evaluated, taking a feature set of frequencies of words and punctuation marks as baseline. The features are ‘deep’ in the sense that they are derived by parsing the subject texts, in contrast to ‘shallow’ syntactic features for which a part-of-speech analysis is enough. The experiments are conducted on a corpus o...