Cryptography Breakthrough Could Make Software Unhackable - Wired Science As a graduate student at the Massachusetts Institute of Technology in 1996, Amit Sahai was fascinated by the strange notion of a “zero-knowledge” proof, a type of mathematical protocol for convincing someone that something is true without revealing any details of why it is true. As Sahai mulled over this counterintuitive concept, it led him to consider an even more daring notion: What if it were possible to mask the inner workings not just of a proof, but of a computer program, so that people could use the program without being able to figure out how it worked? The idea of “obfuscating” a program had been around for decades, but no one had ever developed a rigorous mathematical framework for the concept, let alone created an unassailable obfuscation scheme. Over the years, commercial software companies have engineered various techniques for garbling a computer program so that it will be harder to understand while still performing the same function. Too Powerful to Exist
Sed - An Introduction and Tutorial Last modified: Mon Dec 2 16:50:13 2019 Table of Contents Note - You can click on the table of contents sections to jump to that section. Then click on the section header of any section to jump back to the table of contents. Copyright 1994, 1995 Bruce Barnett and General Electric Company Copyright 2001,2005,2007,2011,2013 Bruce Barnett All rights reserved You are allowed to print copies of this tutorial for your personal use, and link to this page, but you are not allowed to make electronic copies, or redistribute this tutorial in any form without permission. Original version written in 1994 and published in the Sun Observer Introduction to Sed How to use sed, a special editor for modifying files automatically. There are a few programs that are the real workhorse in the UNIX toolbox. One way to think of this is that the old, "classic" version was the basis of GNU, FreeBSD and Solaris verisons of sed. The Awful Truth about sed Sed is the ultimate stream editor. Anyhow, sed is a marvelous utility. .
Judit Polgár As of February 2014[update], Polgár was ranked 58th in the world FIDE ratings list with an Elo rating of 2693, the only[update] woman on FIDE's Top 100 Players list, and has been ranked as high as eighth (in 2005). She has won or shared first in the chess tournaments of Hastings 1993, Madrid 1994, León 1996, U.S. Open 1998, Hoogeveen 1999, Siegman 1999, Japfa 2000, and the Najdorf Memorial 2000. Polgár is the only woman to have won a game from a reigning world number one player, and has defeated ten current or former world champions in either rapid or classical chess: Magnus Carlsen, Anatoli Karpov, Garry Kasparov, Boris Spassky, Vasily Smyslov, Veselin Topalov, Viswanathan Anand, Ruslan Ponomariov, Alexander Khalifman, and Rustam Kasimdzhanov. Early life Career Polgár has rarely played in women's-specific tournaments or divisions and has never competed for the Women's World Championship. Child prodigy J. 1.Rxh7 Rxh7 2.Qxg6+ Kh8 3.Qe8+ with mate to follow.
NSA Snooping Was Only the Beginning. Meet the Spy Chief Leading Us Into Cyberwar | Threat Level Alexander runs the nation’s cyberwar efforts, an empire he has built over the past eight years by insisting that the US’s inherent vulnerability to digital attacks requires him to amass more and more authority over the data zipping around the globe. In his telling, the threat is so mind-bogglingly huge that the nation has little option but to eventually put the entire civilian Internet under his protection, requiring tweets and emails to pass through his filters, and putting the kill switch under the government’s forefinger. “What we see is an increasing level of activity on the networks,” he said at a recent security conference in Canada. “I am concerned that this is going to break a threshold where the private sector can no longer handle it and the government is going to have to step in.” And he and his cyberwarriors have already launched their first attack. The success of this sabotage came to light only in June 2010, when the malware spread to outside computers.
Constructivist Model for Learning The behaviorist theory popularized by B.F. Skinner still drives much of the practice of science education. For more than a quarter century, schools and teachers have been creating behavioral goals and objectives. Curricula have been tightly sequenced according to a belief that the best way to learn is to master small bits of knowledge and then integrate them into major concepts. Assessment practices have tended to focus on measurement of knowledge and skills, with little emphasis on performance and understanding. Since the late 1980s, however, researchers have been building an understanding of learning that grows out of cognitive and developmental psychology. All knowledge is constructed through a process of reflective abstraction. The constructivist classroom presents the learner with opportunities to build on prior knowledge and understanding to construct new knowledge and understanding from authentic experience.
Wireless Witch: How to Secure Your Wireless Network One of the biggest concerns for wireless users is making sure their router and wireless network are secure. I think we all know by now that, when it comes to technology, there is no such thing as being 100 percent secure. Once you send data over a wireless signal, you've already potentially exposed your data to hackers, and once you've set up a router, Wi-Fi signal leeches are always a possibility. That said, there are plenty of ways to harden the security of your router and wireless network. Most of them are fairly easy to put in place, while some take just a bit of configuration in the router's interface. I've included several options each with an accompanying image to get you going towards a more secure Wi-Fi network. The routers I use as examples are the Cisco Linksys Smart Wi-Fi AC 1750HD Video Pro EA6500$149.99 at Dell and the Netgear N600 Wireless Dual Band Gigabit Router (WNDR3700)%displayPrice% at %seller%—with Netgear's new Genie management software.
CompTIA :: Pearson VUE Why CompTIA? As the global IT industry association, CompTIA builds vendor-neutral certifications that measure foundational skills. They show employers you have the skills to do the job, regardless of the vendor of the hardware or software product. Many of these exams are also prerequisites or electives for more advanced vendor certifications. It really is the starting point for a career in IT. Plus, earning a certification not only proves you have the right skills, but also the dedication and commitment to your career to continue learning. Current CompTIA Certifications Currently, CompTIA offers certifications in IT helpdesk/remote support, networking, security, servers, cloud computing, mobility, project management, technical training, Linux, storage, digital imaging and management, and healthcare IT. CompTIA IT Fundamentals Effective June 15, 2015, the CompTIA IT Fundamentals exam (FC0-U51; FC0-Z51) will no longer be available for sale. CompTIA Strata exams Retirement CompTIA Membership
Securing Your Wireless Network If you don't secure your wireless network, strangers could use it and gain access to your computer – including the personal and financial information you’ve stored on it. Protect your computer by using WPA encryption. Understand How a Wireless Network Works Going wireless generally requires connecting an internet "access point" – like a cable or DSL modem – to a wireless router, which sends a signal through the air, sometimes as far as several hundred feet. Any computer within range with a wireless card can pull the signal from the air and access the internet. Unless you take certain precautions, anyone nearby with a wireless-ready computer or mobile device can use your network. Use Encryption Encryption scrambles the information you send over the internet into a code so that it’s not accessible to others. Two main types of encryption are available: Wi-Fi Protected Access (WPA) and Wired Equivalent Privacy (WEP). Wireless routers often come with the encryption feature turned off.
The Creativity Crisis: Hardback: Roberta Ness Strong critique of the academic system from a leading university dean and expert in science and innovationExplores the question of why science finds itself at a crossroad between extraordinary possibility and frustrating inactionA cogent and urgent argument for a rebalancing of priorities in funding agencies, universities, and industriesDescribes opportunities for reinvigorating scientific innovation, such as engaging broad-based resources, capturing the richness of available talent for the purpose of serving society's interests, and gaining flexibility through failing as quickly and painlessly as possibleEvery day we hear about some fascinating new discovery. Yet anemic progress toward addressing the greatest risks to humankind — clean energy, emerging infections, and cancer — warns us that science may not be meeting its potential. Indeed, there is evidence that advances are slowing. Creation and caution in science should be in balance, but they are not.
How to Secure Your Wireless Network Almost all of us have jumped onto someone else's unsecured Wi-Fi network. There's little harm in that if you're just an honest soul looking for an Internet connection. But if you're the owner of an unsecured network, you should be aware that the world's not made up entirely of honest souls--and it's not hard for the dishonest ones to see exactly what you're doing on your network. Sound scary? Q. A. Go with WPA or WPA2 if at all possible, since WEP is relatively easy to crack. If you have an older router that supports WEP only, you'll be safest if you use 128-bit WEP keys--but also check the manufacturer's Web site for a firmware update that will add WPA support. Make sure you change the default network name and password on your router. Q. A. For extra protection, you should run software firewalls on the individual PCs on your network. Q. A. Q. A.
Five new threats to your mobile device security Attacks that proved successful on PCs are now being tested on unwitting mobile device users to see what works – and with the number of mobile devices with poor protection soaring, there are plenty of easy targets. “Attackers are definitely searching after the weakest point in the chain,” and then honing in on the most successful scams, says Lior Kohavi, CTO at CYREN, a cloud-based security solutions provider in McLean, Va. [Slideshow: 15 new, hot security and privacy apps for Android and iOS] Google’s Android operating system averaged 5,768 malware attacks daily over a six-month period, according to CYREN’s Security Report for 2013. BYOD programs entice hackers even more, with the holy grail now being to infiltrate a company’s perimeter through mobile devices, either through social engineering scams that get access to company data through a mobile device, or just by sitting across the street and attacking the company’s WiFi through an infected mobile phone. 1. 2. 3. 4. 5.
Access Control Fundamentals: Door Control | Security Electronics and Networks WHEN you think about access control one of the key challenges is recognising the exactly what such a solution constitutes. If you’re a cardholder, access control is a reader and a card. If you’re handling cardholder admin, it’s software management. If you’re a security manager, it’s automated reports and ongoing card costs. If you’re an installer, access control is more complicated – a sprawling network of readers, locks, door controllers and central controllers linked to local area networks via adjacent switches. But even this more nuanced view of the structure of an access control solution fails to capture the complexity and capability of the modern system. Access control systems, unlike unmonitored video surveillance or alarms, have the capability to act physically on the basis of system design, software rules and electrical inputs/outputs – whether that is denying entry upon presentation of an unauthorised credential or the rejection of all cardholder entries in the event of fire.