Brain Betrayal: A Neuropsychological Categorization of Insider Attacks

Thanks to an abundance of highly publicized data breaches, Information Security (InfoSec) is taking a larger place in organizational priorities. Despite the increased attention, the threat posed to employers by their own employees remains a frightening prospect studied mostly in a technical light. This paper presents a categorization of insider deviant behavior and misbehavior based off of the neuropsychological foundations of three main types of insiders posing a threat to an organization: accidental attackers; neurologically “hot” malcontents, and neurologically “cold” opportunists

Structure of AlSb(001) and GaSb(001) Surfaces Under Extreme Sb-rich Conditions

We use density-functional theory to study the structure of AlSb(001) and GaSb(001) surfaces. Based on a variety of reconstruction models, we construct surface stability diagrams for AlSb and GaSb under different growth conditions. For AlSb(001), the predictions are in excellent agreement with experimentally observed reconstructions. For GaSb(001), we show that previously proposed model accounts for the experimentally observed reconstructions under Ga-rich growth conditions, but fails to explain the experimental observations under Sb-rich conditions. We propose a new model that has a substantially lower surface energy than all (nx5)-like reconstructions proposed previously and that, in addition, leads to a simulated STM image in better agreement with experiment than existing models. However, this new model has higher surface energy than some of (4x3)-like reconstructions, models with periodicity that has not been observed. Hence we conclude that the experimentally observed (1x5) and (2x5) structures on GaSb(001) are kinetically limited rather than at the ground state.Comment: 6 pages, 6 figure