Sony Pictures Hack May Cost Studio around 100 Million More Data Leaked

first_imgThe massive cyber attack on Sony Pictures could cost the company about $100 million, security experts said.Experts who have studied previous hacks told Reuters that though the cost would be less than the $171 million Sony estimated when its Playsation Network was hacked in 2011; it would still be a huge tab for the company.Sony would have to pay for tighter security, further investigation and protection of employee profiles and company passwords this time. The attack, which has been deemed the most damaging cyber hack in the US, has also hurt Sony’s reputation for its failure to ensure protection of company files.The attack crippled employee activity and production for almost a week, which would also cost the company another million dollars.People familiar with the matter told the agency that Sony has insurance cover for such kind of hacks but the insurance only compensates for a portion of the cost.Sony is still grappling with data breaches. Just after the hacker group that calls itself “Guardians of Peace” released employee passwords, salaries and some unpublished pilot scripts, the group has now released a cache of documents that reveals secret aliases of Hollywood actors who use the alternative identities to check in to hotels and use other services anonymously.According to the latest data reveal, Tom Hanks uses “Harry Lauder” as an alias while Sarah Michelle Gellar goes by “Neely O’ Hara.” Natalie Portman and Toby Maguire use “Laura Brown” and “Neil Deep”, respectively.Sony suspects the hacker group belongs to North Korea, which has vehemently denied any involvement. However, the country has called the group “righteous.”Adding to the suspicion is a recent open letter that the hacker group issued to the studio asking it to stop the release of “The Interview.” The movie stars James Franco and Seth Rogan, portraying two journalists who land a rare interview with North Korean leader Kim Jong-Un.The group anonymously posted the letter on GitHub, a programming tool, and threatened to expose more data if their demands were not met.”We are sending you our warning again. Do carry out our demand if you want to escape us. And, Stop immediately showing the movie of terrorism which can break the regional peace and cause the War! You, SONY & FBI, cannot find us. We are perfect as much. The destiny of SONY is totally up to the wise reaction & measure of SONY,” the group’s message read.The message could not be independently verified, according to The Verge.last_img read more

5000 more Rohingyas enter Bangladesh

first_imgRohingya Muslim refugees who had just arrived wait for a place to stay at Bangladesh`s Balukhali refugee camp on 2 October 2017. The UN says more than 14,100 children are at risk of dying from malnutrition in wretched camps where half a million mainly Rohingya refugees depend entirely on charities for survival. Photo: AFPIn the latest influx, some 5,000 more Rohingyas entered Bangladesh through Ulubonia point of the Naf River under Teknaf upazila on Monday.Locals said the Myanmar nationals started gathering at the no-man’s land along the border since the morning. Later, they crossed the river into Bangladesh by hired boats. Nazir Ahmed, 55, son of Abul Hossain of Jabbarpara in Bhuchidang area in Rakhine State of Myanmar, said they entered Bangladesh through the Ulubonia point after walking on foot for five days.Meanwhile, members of Border Guard Bangladesh recovered 30,000 Yaba tablets and 80 cartons of cigarette searching the belongings of the Rohingyas who got down from boats at Shah Porir Dwip of Teknaf on Sunday night.A patrol team of the paramilitary force recovered the contraband items around 9:00pm. However, no one was arrested in this connection.Besides, road transport and bridges minister Obaidul Quader on Monday feared that drugs and firearms might be smuggled into the country by some of the fleeing Rohingyas.Quader, also Awami League general secretary, expressed his apprehension while distributing relief materials among the Rohingyas who have taken shelter in Bangladesh amid persecution on them by the Myanmar security forces in Rakhine.He, however, said the law enforcers have been on alert so that the Rohingyas cannot get involved in criminal activities here.The ruling party leader also said the Rohingya crisis will be resolved through diplomatic efforts.last_img

Nanocrystals selfpurification mechanisms explained by energetics

first_imgIn an example of doped nanocrystals, this charge density plot shows magnesium impurities in cadmium-selenium nanocrystals at two different gap levels: (a) resonant and (b) hybrid. Image credit: Gustavo Dalpian and James Chelikowsky. On the macroscale, doping led to the transistor. On the nanoscale, scientists believe that doping could lead to an assortment of technologies, including solar cells, electroluminescent devices and electronic devices. Doping, which means adding impurities containing electrons, can enable electric conductance in a controlled way. But the miniscule size of semiconductor nanocrystals – also described as one-dimensional “quantum dots” – means that scientists must explore new methods for doping. Because nanocrystals have very little interior volume and are virtually all surface, scientists in the past believed that inner impurities can easily migrate the short distance to the surface and be ejected. “People used to believe that nanocrystals had fewer defects due to their limited size,” explains Gustavo Dalpian, coauthor with James Chelikowsky of a recent publication in Physical Review Letters on the energetics of doping. “People believed that defects could be annealed away from the nanocrystal in an easy way due to its limited size. After a few jumps, the impurity will be out of the nanocrystal.”In 2005, scientists (Erwin et al.) proposed that the difficulties in doping nanocrystals could be explained by the crystals’ surface topology and how easily impurities could bind to the surface. For these reasons, these scientists determined that the smaller the size of a nanocrystal, the less binding energy, and the more difficult doping becomes.Dalpian and Chelikowsky, from the University of Texas, have shown that understanding doping in semiconductor nanocrystals requires an understanding of both kinetic and thermodynamic/energetic properties. By explaining nanocrystals’ tendency toward self-purification in terms of the energy needed to form impurities in nanocrystals, the scientists hope to find new ways to increase the dopability of these materials.“Annealing was basically a kinetic argument,” Dalpian said to PhysOrg.com. “[Erwin et al.] show that, changing their solution to an anion-rich (negatively-charged) environment, they could put more impurities into the nanocrystals. Their argument was that there is a shape change in their nanocrystal that increases the binding energy of the impurity into the surface. We show that the difficulty of nanocrystal doping can also be explained through energetic arguments: when you change the solution to an anion-rich environment, the formation energy of the defects is decreased. Explore further ‘Nanocrystal doping’ enhances semiconductor nanocrystals Citation: Nanocrystals’ ‘self-purification’ mechanisms explained by energetics (2006, June 21) retrieved 18 August 2019 from https://phys.org/news/2006-06-nanocrystals-self-purification-mechanisms-energetics.htmlcenter_img “In principle, an energetic argument should be better because it is simpler:” he continued. “To discuss kinetics, one needs energy barriers, diffusion coefficients, exact shape of the nanocrystal, etc. However, in our model, supposing the system is under thermodynamic equilibrium, we just need the formation energy of the defect.” When an impurity enters a nanocrystal, a level is created in the gap of the nanocrystal, which (along with structural properties) affects the formation energy of the impurity. Dalpian and Chelikowsky found that a defect’s structural properties do not depend on nanocrystal size, but that the level in the gap is deeper (energy difference is larger) for smaller nanocrystals. “Suppose you have two different systems that create levels in the gap, and one is deeper than the other,” said Dalpian. “If you want to populate these levels (put electrons on them), it will cost more energy to populate the one that is deeper. That is why it costs more energy to put impurities in the small nanocrystals than the larger ones: the level created in the gap is filled and is deeper for smaller nanocrystals.”Because smaller nanocrystals contain deeper impurity levels, more energy is required for doping and the lower the population of defects. This explanation supports the idea that self-purification is an intrinsic property of nanocrystals, but also a property that can be overcome.“In order to make doping easier, we also propose that the sample should be grown in an anion-rich solution,” said Dalpian. “Since manganese impurities like to go to the cation (positively-charged) site in cadmium-selenium nanocrystals, a lot of cations create ´competition´ between the impurities and the cadmium (a cation precursor) to occupy the cation site. In an anion-rich environment (the other thermodynamic limit), you have a lot of selenium (an anion precursor) and a deficiency of cadmium, reducing the competition between impurities and cadmium, and making it more likely for the impurities to go to the cadmium site.”Citation: Dalpian, Gustavo M., and Chelikowsky, James R. Self-purification in Semiconductor Nanocrystals. Physical Review Letters 96, 226802 (2006)By Lisa Zyga, Copyright 2006 PhysOrg.com. All rights reserved. This material may not be published, broadcast, rewritten or redistributed. Doping semiconductor nanocrystals will likely provide a basis for a wide variety of nano applications. But since the tiny nanocrystals tend to repel impurities, scientists must first find a way to overcome nanocrystals’ “self-purification” mechanisms and exploit them for doping. This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.last_img read more