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  • Computer Lab School for Orphans

    - by Brendon
    I am helping out an NGO, called Orphans Found Fund, here in Arusha Tanzania setup a computer lab to teach students about Ubuntu and open source applications. I have installed Ubuntu 10.10 on all the systems. What I'm wondering about is how to tweak the systems so that the kids cannot: Delete or alter system files Alter the system settings Add or remove applications Exceed a time limit (like an Internet Cafe) Also as the administrator I would like to monitor the usage for another system to make sure that abuse of network is not taking place. Any advice is much appreciated. Brendon

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  • Creating your own computer! [closed]

    - by AntonioCS
    I recently found this article on a guy that built his own computer. It's just a bunch of wire (as far as I can tell any way) and I was just wondering what would I have to learn/read/do to make such a thing (or at least to have a really basic understanding of what he did). He also made his own operating system, which I find really impressive. I know it will take a while and I am in no hurry. Note: I am a web programmer and also have done some desktop apps (a few years ago).

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  • Computer science [closed]

    - by user73589
    I'm a computer science graduate Information systems department. I graduated this year with GPA 3.8 but I'm totally lost, we didn't work on making applications and writing a lot of codes at college. I feel that if I applied in any job I won't be taken because I don't have any knowledge. I'm a very hardworker but I don't know from where to start and what to do. Should I go for web design and that staff or for Android and mobile applications? What can I do and how to start?

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  • Can my computer run Ubuntu? [duplicate]

    - by Harry B
    This question already has an answer here: How do I find out which version and derivative of Ubuntu is right for my hardware in terms of minimal system requirements? 2 answers Just want to check if my computer can run Ubuntu. It is an old IBM ThinkPad, so here are the basic stats I could find: IBM 28832ZU Processor Intel(R) Celeron(R) M processor 1300MHz Processor Speed 1.27 GHz Memory (RAM) 2048 MB Operating System Microsoft Windows XP Professional Operating System Version 5.1.2600 Intel Extreme Graphics 2M And here is some info pulled from the graphics panel NTEL(R) EXTREME GRAPHICS 2 FOR MOBILE REPORT Report Date: 06/28/2013 Report Time[hr:mm:ss]: 17:53:20 Driver Version: 6.14.10.3943 Operating System: Windows NT* 5.1.2600 Service Pack 2 Default Language: English DirectX* Version: 9.0 Physical Memory: 2038 MB Min. Graphics Memory: 8 MB Max. Graphics Memory: 64 MB Graphics Memory in use: 7 MB Processor: x86 family 6 Model 9 Stepping 5 Processor Speed: 1296 MHZ Device Revision: 2 Output Devices Connected to Graphics Accelerator * Active Notebook Displays:1

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  • Security Talk Webcast: Agile Security - Develop Code Rapidly and Securely with SDL-Agile

    Find out how SDL and Agile can be made to work well together - and in many ways actually work better together than separately. Get an in-depth look at the new MSF-Agile+SDL process template for Visual Studio Team System that can help development teams integrate SDL-Agile tasks directly into their Visual Studio development environments....Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Logging Virus Definition Updates for MS Security Essentials in The Security Event Log

    - by Steve
    I would like to log a security in event in Windows 7 whenever the Microsoft Security Essentials 2 virus definition files are updates, deleted, or changed. I was expecting to do this with an Audit setting on one of the MS Security Essentials folders but I wasn't sure which one and how to avoid getting swamped with messages. What folder or files should I audit to track definition updates (or corruption) in the security events or is there a better approach?

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  • Small projects using the cathedral model: does open-source lower security?

    - by Anto
    We know of Linus' law: With enough eyeballs all bugs are shallow In general, people seem to say that open-source software is more secure because of that very thing, but... There are many small OSS projects with just 1 or 2 developers (the cathedral model, as described by ESR). For these projects, does releasing the source-code actually lower the security? For projects like the Linux kernel there are thousands of developers and security vulnerabilities are quite likely going to be found, but when just some few people look through the source code, while allowing crackers (black hat hackers) to see the source as well, is the security lowered instead of increased? I know that the security advantage closed-source software has over OSS is security through obscurity, which isn't good (at all), but it could help to some degree, at least by giving those few devs some more time (security through obscurity doesn't help with the if but with the when). EDIT: The question isn't whether OSS is more secure than non-OSS software but if the advantages for crackers are greater than the advantages for the developers who want to prevent security vulnerabilities from being exploited.

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  • Stairway to SQL Server Security: Level 1, Overview of SQL Server Security

    The ubiquity of databases and the potentially valuable information stored in them makes them attractive targets for people who want to steal data or harm its owner by tampering with it. Making sure that your data is secure is a critical part of configuring SQL Server and developing applications that use it to store data. 12 must-have SQL Server toolsThe award-winning SQL Developer Bundle contains 12 tools for faster, simpler SQL Server development. Download a free trial.

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  • Antivirus Poses as Windows Security Alert, March Patch

    The campaign's attacks are said to begin when a Web user attempts to visit a WordPress blogger's site. Instead of seeing the intended website, the user is redirected to a site hosting the rogue antivirus. The blogger will see that user's traffic, however, even though they never get to see any actual content. The site performs a phony scan on the user's computer and displays what appear to be existing Trojans found on the computer. In an attempt to look authentic, the rogue antivirus software carries the appearance of a typical Windows Explorer window and also employs a Windows Security Ale...

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  • Computer science curriculum for non-CS major?

    - by Daniel
    Hi all, I would like to have some ideas for building up my foundation CS skills. I have started programming computers 10 years ago and have made a pretty good career out of it. However, I cannot stop thinking that the path that brought me here was very particular, and if something goes wrong (e.g. I get laid off) it would be harder to find a job here in the US on the same salary level, OR in a top company. The reason I say that is that I am a self-learner; my degree is not in Computer Science so although I master C/C++/Java, I do not have the formal CS and mathematical background that many other software developers (esp. here in the US) have. When I look at job interview questions from Apple, Google, Amazon, I have the impression that I'd flunk those technical interviews at some point. Don't get me wrong, I know my algorithms and data structures, but when things dive too deeply into the CS realm I am in trouble. What can I do to close the gap? I was thinking about a MSc in CS, but will I even UNDERSTAND what's going on there if I'm not a CS undergrad? Should I go back to basics and get a BSc in CS instead? I always tend to go into self-study mode when I want to learn new stuff, but I have the impression that I will need more formal education in CS if I want to have a shot at working at those kinds of companies. Thank you!

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  • Situations that require protecting files against tampering when stored on a users computer

    - by Joel
    I'm making a 'Pokémon Storage System' with a Client/Server model and as part of that I was thinking of storing an inventory file on the users computer which I do not wish to be edited except by my program. An alternative to this would be to instead to store the inventory file on the server and control it's editing by sending commands to the server but I was wondering if there are any situations which require files to be stored on a users computer where editing would be undesirable and if so how do you protect the files? I was thinking AES with some sort of checksum?

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  • How to understand computer science as a whole?

    - by MrCellophane
    I am a college student in Computer Science, I have been studying CS for a long time. But even till today, I still feel so confused about a lot of things. First of all, I have solid foundation in alg, data structure, and OOP, but I don't have a clear understanding of the whole system of the subject. I studied database, alg, data structure, OOP, network, software engineering, OS, and a lot of courses. I know what they are, but I don't know how to connect them together. Is there a way to have a clear understanding of the architecture of the subject? And is there a way to know what technology is used to do what? For example, in interviews, when people ask me alg, data str, Java, OS or any other specific field, I could answer, but when they ask some other very general about the field, I have no idea. Well, I know my question maybe a little bit confusing, but what my situation is I don't even know how to ask a clear question. I don't know my question, it's totally a mess in my head. Is there a way to make it clear?

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  • Grandma's Computer - Can a user that belongs only to the "Users" group in Windows XP install malware, virus or IE addons?

    - by DanC
    I am trying to figure out if having a user in the "Users" group will be enough to prevent her from install unwanted software. The things that I don't want the user to be able to install are: virus malware bandoo stuff Internet Explorer Addons To put you in context, I am thinking of my grandma's computer, I want her to be able to read all her email stuff and attachments, but without the hassle of needing to reinstall the whole computer every few months. The computer will run Windows XP, with some free antivirus. It will not be part of any domain. It is just a home computer. Linux, I have tried making her use it, but she was already accustomed to Windows and was not really an option to have her re-learn where was the shutdown button. So, are these considerations enough to prevent her installing unwanted software? What other options come to you mind? Thanks

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  • Customized Computer Science Degree - What other field would mesh well with computer science?

    - by sailtheworld
    So here's my situation: I have seven years of experience with web development. I can do PHP, MySQL, OOP, all of that stuff. I would like to make the argument that I have enough technical experience to go out in the real world and get a well-paying, full-time job if I were to drop out right now (I've had a number of job offers recently, and I have already gotten a lot of actual job experience), but I would like to stay in school and get a degree for a number of reasons ranging from the social aspects to the fact that I just want to have a BS in one thing or another as it seems to be important to have one for a lot of jobs, even when it doesn't have anything to do with the job. With that said, it makes little sense for me to major in Computer Science, because that would be like studying everything I already know. I don't want to major in something COMPLETELY different, because that would be contrary to my career goals. I am considering trying to find some interdisciplinary, customized degree of sorts that allows me to combine my current skills with a new education. I'm thinking maybe buisness or even psychology (interface design?). Could I get some ideas for what to major in and tips on who I might talk to? Thanks!

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  • Writing files in a sub folder of the web folder (apache security)

    - by Homunculus Reticulli
    I need to save session data for a dynamic web page script by writing to file. I have two questions: Are there any security preferences as to whether to save the data UNDER the web folder, or OUTSIDE the web folder? I attempted to write to the folder an (unsuprisingly), I had a 'file permission refused' type error. Should I set the folder ownership to the apache user (600, 640 or 644?) [[Edit]] core <- 'OUTSIDE' web folder (php script live here) data <- 'OUTSIDE' web folder (session data and other misc data resides here) web <- web root folder js <- any folder below is 'INSIDE' the web folder css html For example, in a php script (i.e. a dynamic PHP page), I can attempt to write to a file using something like fput('../data',data) yet (as I understand it) ../data should not be accessible - for security reasons. Could someone please provide a simple example that shows how to provide access to ../data/ in the example given above?. What are the actual SPECIFIC steps required? BTW, I am running on a LAMP stack.

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  • Security Goes Underground

    - by BuckWoody
    You might not have heard of as many data breaches recently as in the past. As you’re probably aware, I call them out here as often as I can, especially the big ones in government and medical institutions, because I believe those can have lasting implications on a person’s life. I think that my data is personal – and I’ve seen the impact of someone having their identity stolen. It’s a brutal experience that I wouldn’t wish on anyone. So with all of that it stands to reason that I hold the data professionals to the highest standards on security. I think your first role is to ensure the data you have, number one because it can be so harmful, and number two because it isn’t yours. It belongs to the person that has that data. You might think I’m happy about that downturn in reported data losses. Well, I was, until I learned that companies have realized they suffer a lowering of their stock when they report it, but not when they don’t. So, since we all do what we are measured on, they don’t. So now, not only are they not protecting your information, they are hiding the fact that they are losing it. So take this as a personal challenge. Make sure you have a security audit on your data, and treat any breach like a personal failure. We’re the gatekeepers, so let’s keep the gates. Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!

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  • Security Risks of Unsigned ClickOnce Manifests

    - by Tom Tom
    Using signed manifests in ClickOnce deployments, it is not possible to modify files after the deployment package has been published - installation will fail as hash information in the manifest won't match up with the modified files. I recently stumbled upon a situation where this was problematic - customers need to be able to set things like connection strings in app.config before deploying the software to their users. I got round the problem by un-checking the option to "Sign the ClickOnce manifests" in VS2010 and explicitly excluding the app.config file from the list of files to have hashes generated during the publish process. From a related page on MSDN "Unsigned manifests can simplify development and testing of your application. However, unsigned manifests introduce substantial security risks in a production environment. Only consider using unsigned manifests if your ClickOnce application runs on computers within an intranet that is completely isolated from the internet or other sources of malicious code." In my situation, this isn't an immediate problem - the deployment won't be internet-facing. However, I'm curious to learn what the "substantial security risks" of what I've done would be if it was internet-facing (or if things changed and it needed to be in the future). Thanks in advance!

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  • chrome extension login security with iframe

    - by Weaver
    I should note, I'm not a chrome extension expert. However, I'm looking for some advice or high level solution to a security concern I have with my chrome extension. I've searched quite a bit but can't seem to find a concrete answer. The situation I have a chrome extension that needs to have the user login to our backend server. However, it was decided for design reasons that the default chrome popup balloon was undesirable. Thus I've used a modal dialog and jquery to make a styled popup that is injected with content scripts. Hence, the popup is injected into the DOM o the page you are visiting. The Problem Everything works, however now that I need to implement login functionality I've noticed a vulnerability: If the site we've injected our popup into knows the password fields ID they could run a script to continuously monitor the password and username field and store that data. Call me paranoid, but I see it as a risk. In fact,I wrote a mockup attack site that can correctly pull the user and password when entered into the given fields. My devised solution I took a look at some other chrome extensions, like Buffer, and noticed what they do is load their popup from their website and, instead, embed an iFrame which contains the popup in it. The popup would interact with the server inside the iframe. My understanding is iframes are subject to same-origin scripting policies as other websites, but I may be mistaken. As such, would doing the same thing be secure? TLDR To simplify, if I embedded an https login form from our server into a given DOM, via a chrome extension, are there security concerns to password sniffing? If this is not the best way to deal with chrome extension logins, do you have suggestions with what is? Perhaps there is a way to declare text fields that javascript can simply not interact with? Not too sure! Thank you so much for your time! I will happily clarify anything required.

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  • Custom Glassfish Security Realm does not work (unable to find LoginModule)

    - by ifischer
    I'm trying to get a Custom Security Realm in Glassfish working (i tried 3.0.1 final and 3.1 B33). I read nearly all tutorials about this, but it doesn not work on my System. I'm getting the error Login failed: javax.security.auth.login.LoginException: unable to find LoginModule class: de.company.security.utility.CustomLoginModule when trying to login. Here is what i did: I created a little Maven project, which contains the needed Realm class, CustomRealm, and the corresponding LoginModule, CustomLoginModule. My pom.xml: <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.mycompany</groupId> <artifactId>CustomJDBCRealm</artifactId> <version>1.0-SNAPSHOT</version> <packaging>jar</packaging> <name>Custom JDBCRealm</name> <url>http://maven.apache.org</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> <dependencies> <dependency> <groupId>org.glassfish.security</groupId> <artifactId>security</artifactId> <version>3.1-b33</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.6</source> <target>1.6</target> <optimise>true</optimise> <debug>true</debug> <encoding>UTF-8</encoding> </configuration> </plugin> </plugins> </build> </project> My Custom Realm class: package de.company.security.utility; import com.sun.appserv.security.AppservRealm; import com.sun.enterprise.security.auth.realm.BadRealmException; import com.sun.enterprise.security.auth.realm.InvalidOperationException; import com.sun.enterprise.security.auth.realm.NoSuchRealmException; import com.sun.enterprise.security.auth.realm.NoSuchUserException; import java.util.Enumeration; import java.util.Properties; import java.util.Vector; /** * * @author ifischer */ public class CustomRealm extends AppservRealm { Vector<String> groups = new Vector<String>(); private String jaasCtxName; private String startWith; @Override public void init(Properties properties) throws BadRealmException, NoSuchRealmException { jaasCtxName = properties.getProperty("jaas-context", "customRealm"); startWith = properties.getProperty("startWith", "z"); groups.add("dummy"); } @Override public String getAuthType() { return "Custom Realm"; } public String[] authenticate(String username, char[] password) { // if (isValidLogin(username, password)) return (String[]) groups.toArray(); } @Override public Enumeration getGroupNames(String username) throws InvalidOperationException, NoSuchUserException { return groups.elements(); } @Override public String getJAASContext() { return jaasCtxName; } public String getStartWith() { return startWith; } } My LoginModule class: /* * Copyright (c) 2010 ProfitBricks GmbH. All Rights Reserved. */ package de.company.security.utility; import com.sun.appserv.security.AppservPasswordLoginModule; import com.sun.enterprise.security.auth.login.common.LoginException; import java.util.Set; import org.glassfish.security.common.PrincipalImpl; /** * * @author ifischer */ public class CustomLoginModule extends AppservPasswordLoginModule { @Override protected void authenticateUser() throws LoginException { _logger.info("CustomRealm : authenticateUser for " + _username); final CustomRealm realm = (CustomRealm)_currentRealm; if ( (_username == null) || (_username.length() == 0) || !_username.startsWith(realm.getStartWith())) throw new LoginException("Invalid credentials"); String[] grpList = realm.authenticate(_username, getPasswordChar()); if (grpList == null) { throw new LoginException("User not in groups"); } _logger.info("CustomRealm : authenticateUser for " + _username); Set principals = _subject.getPrincipals(); principals.add(new PrincipalImpl(_username)); this.commitUserAuthentication(grpList); } } I compiled this Maven project and copyied the resulting JAR-file to the Glassfish/lib directory. Then i added the Security Realm "customRealm" to my Glassfish with asadmin: asadmin create-auth-realm --classname de.company.security.utility.CustomRealm --property jaas-context=customRealm:startWith=a customRealm I even referenced the LoginModule class for the JAAS context of my Custom Realm, therefore i inserted this into the login.conf of my domain: customRealm { de.company.security.utility.CustomLoginModule required; }; Although this LoginModule SHOULD BE on the Glassfish classpath, as it's classfiled is packaged in the JAR that i put into the Glassfish/lib-dir, it cannot be found when i try to login. For login, i build a really simple JSF-project, which calls the HttpServletRequest-login-method of Servlet 3.0. When trying to login i'm getting the following Exception: 2010-12-24T14:41:31.613+0100|WARNING|glassfish3.0.1| javax.enterprise.system.container.web.com.sun.web.security|_ThreadID=25; _ThreadName=Thread-1;|Web login failed: Login failed: javax.security.auth.login.LoginException: unable to find LoginModule class: de.company.security.utility.CustomLoginModule Anybody got an idea what i can do that Glassfish loads the LoginModule-class?

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  • Spring security with GAE

    - by xybrek
    I'm trying to implement Spring security for my GAE application however I'm getting this error: No bean named 'springSecurityFilterChain' is defined I added this configuration on my application web.xml: <filter> <filter-name>springSecurityFilterChain</filter-name> <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class> </filter> <filter-mapping> <filter-name>springSecurityFilterChain</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> And in the servlet-context: <!-- Configure security --> <security:http auto-config="true"> <security:intercept-url pattern="/**" access="ROLE_USER" /> </security:http> <security:authentication-manager alias="authenticationManager"> <security:authentication-provider> <security:user-service> <security:user name="jimi" password="jimi" authorities="ROLE_USER, ROLE_ADMIN" /> <security:user name="bob" password="bob" authorities="ROLE_USER" /> </security:user-service> </security:authentication-provider> </security:authentication-manager> What could be causing the error?

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  • Could someone explain Spring Security BasePermission.Create?

    - by Matthew Sowders
    I am working on a project that involves Spring Security ACL and I came across the create permission BasePermission.CREATE. Would someone please explain how this is supposed to work or what it allows someone to do? It is my understanding that each object has an acl, and each acl has many ace's, and each ace has an sid and a permission. How can you grant permission on an object to create it, if it must be created in order to attach the acl to it?

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  • Can't work out security

    - by user215351
    I installed Ubuntu on puter I am the only user I alone use. I was trying a to find out how to repair hardware faults. Surprised to find I was not the owner and that there is a password that locks me out. I only set one password during set up so what is this mysterious password. As far as I'm concerned it is overdone on security, Im sick of authenticating every 3 seconds. I need a simpler system

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  • Worst security hole you've seen?

    - by Si
    Subject says it all, probably a good idea to keep details basic to protect the guilty. FWIW, here's a question about what to do if you find a security hole, and another with some useful answers if a company doesn't (seem to) respond.

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  • cPanel's Web Disk - Security issues?

    - by Tim Sparks
    I'm thinking of using Web Disk (built into the later versions of cPanel) to allow a Windows or Mac computer to map a network drive that is actually a folder on our website (above the public_html folder). We currently use an antiquated local server to store information, but it is only accessible from one location - we would like to be able to access it from other locations as well. I understand that folders above public_html are not accessible via http, but I want to know how secure is the access to these folders as a network drive? There is potentially sensitive information that we need to decide whether it is appropriate to store here. The map network drive option seems to work well as it behaves as if the files are on your own computer (i.e. you can open and save files without then having to upload them - as it happens automatically). We have used Dropbox for similar purposes, but space is a issue with them, as is accountability and so we haven't used it for sensitive information. Are there any notable security concerns with using Web Disk as a secure file server?

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