The protection of computer systems and information from threats such as theft or data destruction.

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16
votes
6answers
7k views

How can visiting a webpage infect your computer?

My mother's computer recently became infected with some sort of rootkit. It began when she received an email from a close friend asking her to check out some sort of webpage. I never saw it, but my ...
14
votes
1answer
8k views

How secure is Apple's Bluetooth keyboard?

Can anybody post any documentation on how Mac OS X and Apple's Bluetooth keyboard pair up with each other? I have seen the articles Apple keyboard pairing over Bluetooth and Which wireless keyboard ...
11
votes
10answers
928 views

What are the possible ways to prevent laptop theft? [closed]

How can I prevent laptop theft? What are the possible ways to secure the laptop itself and any data on the laptop? I have seen anti-theft cables in malls. Can I use these in my home? Will laptop ...
10
votes
3answers
3k views

Windows XP Mode Vulnerabilities as of April 8th, 2014

EDIT I appreciate the answers I've gotten so far, but I might not have worded the question clearly enough. Is the Windows 7 side of the machine running in XP Mode exposed to any dangers it would ...
10
votes
5answers
59k views

How do I remove a usage restriction from a PDF file? [duplicate]

I have made usage restrictions to a PDF file and protected it with a password. Now I would like to remove the protection to allow my self to do more with the document. Doing a Google search for "...
9
votes
4answers
52k views

putty 0.61: why do I see “Access Denied” message after I enter my login id?

I use putty to login to my RHEL 5.3 server. I'm prompted to enter my login as "login as" and I enter my login Id. As soon as I press Enter, I see a "Access Denied" message following which I'm prompted ...
9
votes
4answers
8k views

How to run Firefox in Protected Mode? (i.e. at low integrity level)

I noticed that Firefox, unlike Chrome and Internet Explorer, doesn't run in the Low Mandatory Level (aka Protected Mode, Low Integrity) Google Chrome: Microsoft Internet Explorer: Mozilla ...
9
votes
9answers
779 views

Is email encryption practical enough?

All emails I have ever sent were sent as plain text. Like postcards, everybody on the way to the addressee could easily read and store them. This worries me. I know privacy is something of the past, ...
7
votes
3answers
5k views

Running without admin rights: As users, what can we do to get apps working (that demand admin rights)? [closed]

I was prompted to ask this because of following question: Why does the majority of people in the Windows world still appear to not get that working as admin is plain stupid? We all know, deep down, ...
7
votes
2answers
364 views

How can I be sure that a Google Chrome extension isn't doing evil things?

I wanted to install this extension, but I have security concerns. The extension needs permission to "Access your data on all websites". This makes sense, but I presume this includes password and ...
6
votes
3answers
31k views

Find out if a PC has a TPM chip installed?

I have several Windows XP laptops that I need to check to see if they will work with Bitlocker if I install Windows 7. If they have a Trusted Platform Module (TPM) chip then Bitlocker should work ...
6
votes
3answers
2k views

Worms vs Virus what's the difference? [closed]

I don't understand very well the difference between viruses ans worms, it seems that worms don't need any host to duplicate himself. But somebody can explain it? It means that a worm IS a soft? and ...
6
votes
2answers
2k views

Transparent screensaver for linux?

I want to have a few console windows running tail -f on logs. Unfortunately this means that anyone with access to the computer can press Ctrl+c and have shell access. So I want to lock the screen ...
6
votes
4answers
34k views

How to prevent the sethc.exe hack?

There is an exploit that allows users to reset the Administrator password on Windows. It is done by booting from a repair disk, starting command prompt, and replacing C:\Windows\System32\sethc.exe ...
5
votes
7answers
14k views

Disk wiping other than DBAN

Sometimes using DBAN takes several days to wipe a disk. What alternatives do you have experience with that work within a few hours and offer the simplicity of DBAN? I am mainly interested in free ...
5
votes
5answers
1k views

Stopping kids from using a machine for illegal activites?

How do I stop someone using my computer from going to adult websites or from opening any inappropriate material like adult videos or images which may may come via pen-drives or CD/DVD? Is there any ...
3
votes
1answer
8k views

Scan network for writable shares

I have a small-business network with 30 Windows XP machines on a single subnet and in a simple workgroup, not a domain. I would like to put a process in place that scans the network for writable ...
2
votes
1answer
4k views

Windows method to detect ARP Poisoning in my local network (LAN)?

(This question comes from this thread, and is intended to remain as a reference question/answer pair for more generic ARP network detection not limited to WiFi, or without the need of the specific ...
23
votes
4answers
2k views

What functionality would I lose if I disable browser-based Java?

I am reading that disabling Java—not JavaScript—will make my computer safer form malicious software attacks. All indications are that it will indeed make it safer, but there are no real reasons out ...
18
votes
3answers
97k views

How to disable “Download scanning protection” of new Chrome-17?

In recent update of Google Chrome internet browser (in stable channel), there is a new security/privacy option: http://chrome.blogspot.com/2012/02/faster-browsing-safer-downloading.html In ...
12
votes
7answers
9k views

Why is MAC-based authentication insecure?

Most wireless routers can use MAC-based authentication as part of their overall security scheme. It seems like a good idea, but I've heard that it is very ineffective, because it's easy to spoof MAC ...
12
votes
2answers
11k views

How to find out when a disc (DVD) has been written/burned?

Is there a way/tool to determine the date and time when a disc has been written/burned with high certainty? This is about data forensics and should be a solid proof. I already tried IsoBuster, but it ...
10
votes
3answers
5k views

Why are email transfers between mail servers often not encrypted?

Users can often choose if they want to access their email provider (such as Gmail) using a secure channel (e.g. using HTTPS). However, to the best of my knowledge, when it comes to mail-server-to-...
10
votes
1answer
1k views

How to “jail” Java applications in OS X?

Is it possible to "jail" Java applications? My bank has an applet that requests "unrestricted access" to my computer. That makes me feels very uneasy. There should be a way to tell the java ...
9
votes
2answers
4k views

Is it okay to use an administrator account for everyday use if UAC is on?

Since I switched to Windows 7 about 3 years ago, and now using Windows 8.1, I have become familiar with the concept of User Account Control and used my PC the following way: a standard account which I ...
9
votes
3answers
18k views

Disable Windows 7’s “Open File - Security Warning” dialog for exe on local drive?

I am trying to run Eclipse java-galileo-SR2-win32 when I get open-file-security-warning. The files are just extracted from a zip file and put into a directory "C:\Users\UserName\AppData\LocalLow\...
8
votes
6answers
2k views

Do I really need a firewall?

I've been using the Nod32 security suite for some time now, and out of all the others that I've tried, it's great (low memory footprint, fast, fairly cheap). However, I've been installing a lot of ...
7
votes
3answers
48k views

Windows 7 : Any way to disable “show caracter” in WIFI network properties?

Here's my issue. I'm working in a school as IT Tech and I'm currently planning to roll out Windows 7 on students laptop. The issue is : When you go to the properties of a WIFI network, you have the ...
7
votes
3answers
10k views

What is the SYSTEM group in Windows 7?

I want to disallow access to a drive in Windows 7, to all the users except myself (admin). So I have deleted all the users and groups in the drive's Security dialog but I am not sure whether I should ...
7
votes
6answers
2k views

Looking for a USB Thumbdrive / Flash drive encryption solution (not TrueCrypt) [closed]

I am looking for a USB Thumbdrive / Flash drive encryption solution. I have searched the net but I have never come accross a solution which meets the following: Must handle at least 4GB volume If ...
5
votes
2answers
25k views

What is the Windows 7 command-line to remove all remember passwords in Credential Manager?

We can remove remembered/cached passwords via Credential Manager as here and via a command cmdkey as here. I want to have one command that quickly clear all the passwords. How can we do that?
5
votes
3answers
9k views

How can I leave the remote screen locked when I ARD/VNC/etc. to my Mac?

I'm currently using Jolly's Fast VNC and Mac OS X's built-in VNC server (System Preferences, Sharing, Screen Sharing) to access my iMac remotely. Here's my problem: When I'm using the iMac remotely, ...
4
votes
2answers
376 views

How do I distinguish between these two certificate situations?

Situation 1 (safe): Website was vulnerable to heartbleed and using a certificate not valid before 2012-10-21 Website upgraded to an unvulnerable version of OpenSSL Website re-keyed and got a their ...
3
votes
1answer
1k views

Internet Explorer security warning: want to view only the webpage content delivered securely?

Consider visiting a website using HTTPS. Internet Explorer (IE8 in this case) presents a warning: Do you want to view only the webpage content that was delivered securely? Clicking the More ...
3
votes
2answers
3k views

How to schedule Motion detection

I've just discovered Motion and it works like a charm.. My only problem is that I'd like it to be active only during night-time, but there's no parameter for scheduling.. I think I could write a ...
3
votes
2answers
709 views

Data protection on HDD: trying to sort out relevant technologies

I'm trying to understand how I can protect data from being used if a computer or a hard drive disk is stolen. I'm looking for reasonable protection against non authorized access to private data (...
2
votes
1answer
6k views

Reconfiguring a WiFi Access Point's wireless settings through WPS?

As you may know, WiFi Protected Setup (WPS) has recently been broken. I downloaded and tested Reaver-WPS, the tool that implements the WPS attack. The tool's README file states: Reaver performs a ...
2
votes
1answer
787 views

http Redirect to https Sometimes Leads to “this page contains other resources which are not secure”

In Chrome (though I may have seen similar behavior in other browsers), type in http://www.google.com. You will always be redirected to https://www.google.com. Usually when I do this, I get the good ...
2
votes
0answers
454 views

Make Chrome automatically load insecure content for specific pages/websites

Is it possible to have Chrome load content for specific web pages? I have this page that I go to all the time and I am tired of clicking on the shield each time(to load anyway). I don't want to have ...
1
vote
2answers
7k views

Allow one Windows user to only execute 2 applications

I'm using Windows 8 Pro. I'm trying to create a very limited Windows account. The account will only have: Remote Desktop Access Shell replaced by our own in-house application Access to the one FTP ...
1
vote
1answer
886 views

How do you unprotect the VBA macros for a macro-enabled workbook if you forgot the password?

I have heard myths about how easy it is to crack a VBA macro password, but haven't been able to figure out how to do it myself. We have an excel file at work where the VBA is password protected and ...
1
vote
1answer
503 views

What alternative security measures are there to full drive encryption (for performance reasons)?

I'm evaluating full drive encryption using Truecrypt on my Crucial M4 SSD on Windows 7 32bit Pro on my Toshiba NB100 Atom N270 Netbook. I've encrypted this and noticed an increase in the boot time ...
45
votes
4answers
3k views

Should I install Internet Explorer updates although I disabled it?

I have disabled Internet Explorer in the "Windows Features" dialog. Nonetheless Windows Update alerts me that there are security updates for IE. I am aware that I cannot uninstall IE and it remains ...
42
votes
8answers
17k views

How safe is Firefox password manager?

I have been using the Firefox password manager for long time, but never checked/verified how secure it is.
37
votes
12answers
7k views

What is the value of MD5 checksums if the MD5 hash itself could potentially also have been manipulated?

Downloads on websites sometimes have an MD5 checksum, allowing people to confirm the integrity of the file. I have heard this is to allow not only corrupted files to be instantly identified before ...
17
votes
5answers
11k views

Is https traffic over an unencrypted wireless network secure?

This is something I've wondered for a long time. If I am, say, using Gmail over https, can someone read my IM conversations and emails if I use an unsecured wireless network? I assume that the data ...
10
votes
3answers
1k views

Do end users need to do anything about the Heartbleed security bug? What?

I see in the news about the “Heartbleed” security bug. As an end user, do I need to do anything about it?
8
votes
2answers
13k views

Windows Defender vs. Security Essentials in Windows 8

What is the difference between Windows Defender on Windows 8 and Microsoft Security Essentials? They practically look alike, so is there a need to install Security Essentials?
8
votes
6answers
8k views

Removing the “Open File - Security Warning” in windows 8?

I like to study a lot of code from various sources from around the internet, and a big part of that involves downloading and opening the files to view the source code. Now every time I try to open ...
8
votes
2answers
9k views

Is Gtalk communication encrypted?

What is the level of security offered by gtalk against eaves-dropping?