Computing desk | ||
---|---|---|
< August 11 | << Jul | August | Sep >> | August 13 > |
Welcome to the Wikipedia Computing Reference Desk Archives |
---|
The page you are currently viewing is an archive page. While you can leave answers for any questions shown below, please ask new questions on one of the current reference desk pages. |
How can one retrieve images etc. that have been taken off Internet just a few days ago. Taken off too early for archive.org and too late for google's cache -- Jon Ascton (talk) 02:22, 12 August 2010 (UTC)
How do I secure the entire contents of a folder in Windows in such a way that someone without the password cannot even recognise what the content is? By that I mean that they should not even be able to tell that the file is for example a spreadsheet - instead of "secrettakeoverplan.xls" it should look like "nothingtoseehere.not". A multi-user setup won't work because that does not actually scramble and hide the content of other users' files. Roger ( talk) 05:46, 12 August 2010 (UTC)
tar cvf foo.tar foo
gpg -c foo.tar
shred foo/*
/bin/rm -rf foo
gpg foo.tar.gpg
tar xvf foo.tar
Well, it depends how paranoid you are. Here's what you can be sure of: if you have a secure computer, you encrypt something on it properly, and it goes to the tech shop, you can be assured that they can't read it. Travatore's solution is that using GPG (although there are easier ways to do it entirely in windows without messing with cygwin).
The problem is when you get the computer back, you log in and unencrypt the contents to use them. At the point you type the password into the computer that was in someone else's hands, it's possible for the computer to "phone home" the key to the tech shop. Then they can read it. This is called the "evil maid" scenario.
As you'll notice the vulnerability isn't the encryption, it's the fact that you could later inadvertently reveal your password. As for doing the encryption right, Truecrypt's good, PGP or it's Linux equivalent GPG are good, as is FreeOTFE. Actually the newer zip specifications are better than they were.
Finally ask yourself this: why are you bringing in your files to the tech shop in the first place? Is it you suspect your computer got a virus? If that's the case then the virus writer could do the same evil maid scenario as the tech shop guy could. What you're asking for isn't impossible, but you just need to be aware of the possible avenues of attack. Let us know if you'd like more specificity about any of those. This discussion could encompass a small text-book. Shadowjams ( talk) 07:40, 12 August 2010 (UTC)
Hello Friends,
Can anybody tell me the explanation about the following line?
int i; i =23L; printf("%d %lu",i,i);
Why do we put 23L and what is the meaning? And give me one example code with output. —Preceding unsigned comment added by 122.164.62.13 ( talk) 06:57, 12 August 2010 (UTC)
long
. It's assigned to a variable of type int
. Integers of different types are silently converted in C, so the "L" is pointless, but the assignment works. Then you have a line that prints the value (23) of i
as an int
and as an unsigned long
. Since i
is not an unsigned long
, the result is undefined. Everything can happen. What will happen on the most common current computing environments is that the compiler will issue a warning, but the compiled program prints "23 23", since typically both int
and unsigned long
are 32 bits and have the same representation for small positive values. --
Stephan Schulz (
talk) 07:57, 12 August 2010 (UTC)How sensible would it be to leave a 2GB+ USB pendrive plugged into the back of my old WinXP computer all the time? I turn my computer on and off at least once a day. I would like to use the USB stick as a backup for my essential documents in case the HD suddenly goes kaput. Thanks 92.28.244.237 ( talk) 10:32, 12 August 2010 (UTC)
I'm looking for a Windows application that's like task manager, but allows you to kill programs immediately. I don't want a stupid confirmation window that asks whether I really want to end the task; I want a program that kills programs and frees up their memory by brute force, using whatever means necessary, as fast as possible. Actually, it would be better if the application let me press a hotkey, point to a window, click, and terminate whatever processes associated with the window, without opening up a window like Task Manager. Does anyone know of such an application? -- 99.237.234.104 ( talk) 16:28, 12 August 2010 (UTC)
^!Backspace:: MouseGetPos,,,winid WinGet,pid,PID,ahk_id %winid% Process,Close,%pid% return
I'm helping with my high school class' 25th reunion - sort of by default, since someone else had to move out of state. I'm trying to figure out if it's possible to contact all those who have clicked Like on the page - there are 126 out of 440 or so graduates. Or, is there even a way to find the names of all who Like the page? I figure that's a good way to get out the poll I'd like to do, as there are a few different options which I'd like to get peoples' opinions on; especially summer versus school year. (Our annual football rivalry, which is huge.)
I haven't been able to figure out a way, and Facebook's help center doens't seem that helpful; then again, I haven't been on Facebook very long, so maybe I'm missing something, but it seems like it's mostly just dozens of unanswered questions, with no technician I can ask. (Understandable, of course; I'm sure they'd be swamped if there was one. Or, maybe I'm just missing it.)
Enough people have written on the wall in the last year that I could just message them; they seem most interested, anyway. But, nobody's responded to the posts I've made on the wall, so I just wonder if they're even being read. And, I posted several polls 2 months ago, and they've gotten maybe 3-4 votes.
Or, maybe it's like one friend who just doens't have strong feelings either way.
Thanks for any help, and sorry if this isn't the right board, but I figure Facebook would be in with computers. Somebody or his brother ( talk) 17:11, 12 August 2010 (UTC)
Hello,
I received an email from Chase Bank that looked legit. It said that Chase was going to deactivate my account, and to rectify the situation, I should follow the link they provided. I clicked the link, but once I saw the information it wanted from me, I became suspicious. I clicked one of the bottom links on the website called something like "Legal Information", which resulted in a pop-up saying something like "This is just demo. There is no legal information on the demo page". I contacted Chase Bank, as well as the Dean and Student Accounts of my college, since it mentioned my student accounts, (I was worried some other students might receive this email).
Is there anyone else I should contact? And because I opened the email, followed the link, and clicked "Legal Information", will I get a virus? Will the frauds be able to get any information off my computer, or from my email account?
Thank you for your help —Preceding unsigned comment added by 74.104.142.6 ( talk) 23:05, 12 August 2010 (UTC)
I'm looking for a movie making software for a beginner. It should give me more options than Windows Movie Maker but still easy to learn and use. Comparison of video editing software does not include how easy the software is to use so I would like some recommendations. thanks F ( talk) 23:09, 12 August 2010 (UTC)
Computing desk | ||
---|---|---|
< August 11 | << Jul | August | Sep >> | August 13 > |
Welcome to the Wikipedia Computing Reference Desk Archives |
---|
The page you are currently viewing is an archive page. While you can leave answers for any questions shown below, please ask new questions on one of the current reference desk pages. |
How can one retrieve images etc. that have been taken off Internet just a few days ago. Taken off too early for archive.org and too late for google's cache -- Jon Ascton (talk) 02:22, 12 August 2010 (UTC)
How do I secure the entire contents of a folder in Windows in such a way that someone without the password cannot even recognise what the content is? By that I mean that they should not even be able to tell that the file is for example a spreadsheet - instead of "secrettakeoverplan.xls" it should look like "nothingtoseehere.not". A multi-user setup won't work because that does not actually scramble and hide the content of other users' files. Roger ( talk) 05:46, 12 August 2010 (UTC)
tar cvf foo.tar foo
gpg -c foo.tar
shred foo/*
/bin/rm -rf foo
gpg foo.tar.gpg
tar xvf foo.tar
Well, it depends how paranoid you are. Here's what you can be sure of: if you have a secure computer, you encrypt something on it properly, and it goes to the tech shop, you can be assured that they can't read it. Travatore's solution is that using GPG (although there are easier ways to do it entirely in windows without messing with cygwin).
The problem is when you get the computer back, you log in and unencrypt the contents to use them. At the point you type the password into the computer that was in someone else's hands, it's possible for the computer to "phone home" the key to the tech shop. Then they can read it. This is called the "evil maid" scenario.
As you'll notice the vulnerability isn't the encryption, it's the fact that you could later inadvertently reveal your password. As for doing the encryption right, Truecrypt's good, PGP or it's Linux equivalent GPG are good, as is FreeOTFE. Actually the newer zip specifications are better than they were.
Finally ask yourself this: why are you bringing in your files to the tech shop in the first place? Is it you suspect your computer got a virus? If that's the case then the virus writer could do the same evil maid scenario as the tech shop guy could. What you're asking for isn't impossible, but you just need to be aware of the possible avenues of attack. Let us know if you'd like more specificity about any of those. This discussion could encompass a small text-book. Shadowjams ( talk) 07:40, 12 August 2010 (UTC)
Hello Friends,
Can anybody tell me the explanation about the following line?
int i; i =23L; printf("%d %lu",i,i);
Why do we put 23L and what is the meaning? And give me one example code with output. —Preceding unsigned comment added by 122.164.62.13 ( talk) 06:57, 12 August 2010 (UTC)
long
. It's assigned to a variable of type int
. Integers of different types are silently converted in C, so the "L" is pointless, but the assignment works. Then you have a line that prints the value (23) of i
as an int
and as an unsigned long
. Since i
is not an unsigned long
, the result is undefined. Everything can happen. What will happen on the most common current computing environments is that the compiler will issue a warning, but the compiled program prints "23 23", since typically both int
and unsigned long
are 32 bits and have the same representation for small positive values. --
Stephan Schulz (
talk) 07:57, 12 August 2010 (UTC)How sensible would it be to leave a 2GB+ USB pendrive plugged into the back of my old WinXP computer all the time? I turn my computer on and off at least once a day. I would like to use the USB stick as a backup for my essential documents in case the HD suddenly goes kaput. Thanks 92.28.244.237 ( talk) 10:32, 12 August 2010 (UTC)
I'm looking for a Windows application that's like task manager, but allows you to kill programs immediately. I don't want a stupid confirmation window that asks whether I really want to end the task; I want a program that kills programs and frees up their memory by brute force, using whatever means necessary, as fast as possible. Actually, it would be better if the application let me press a hotkey, point to a window, click, and terminate whatever processes associated with the window, without opening up a window like Task Manager. Does anyone know of such an application? -- 99.237.234.104 ( talk) 16:28, 12 August 2010 (UTC)
^!Backspace:: MouseGetPos,,,winid WinGet,pid,PID,ahk_id %winid% Process,Close,%pid% return
I'm helping with my high school class' 25th reunion - sort of by default, since someone else had to move out of state. I'm trying to figure out if it's possible to contact all those who have clicked Like on the page - there are 126 out of 440 or so graduates. Or, is there even a way to find the names of all who Like the page? I figure that's a good way to get out the poll I'd like to do, as there are a few different options which I'd like to get peoples' opinions on; especially summer versus school year. (Our annual football rivalry, which is huge.)
I haven't been able to figure out a way, and Facebook's help center doens't seem that helpful; then again, I haven't been on Facebook very long, so maybe I'm missing something, but it seems like it's mostly just dozens of unanswered questions, with no technician I can ask. (Understandable, of course; I'm sure they'd be swamped if there was one. Or, maybe I'm just missing it.)
Enough people have written on the wall in the last year that I could just message them; they seem most interested, anyway. But, nobody's responded to the posts I've made on the wall, so I just wonder if they're even being read. And, I posted several polls 2 months ago, and they've gotten maybe 3-4 votes.
Or, maybe it's like one friend who just doens't have strong feelings either way.
Thanks for any help, and sorry if this isn't the right board, but I figure Facebook would be in with computers. Somebody or his brother ( talk) 17:11, 12 August 2010 (UTC)
Hello,
I received an email from Chase Bank that looked legit. It said that Chase was going to deactivate my account, and to rectify the situation, I should follow the link they provided. I clicked the link, but once I saw the information it wanted from me, I became suspicious. I clicked one of the bottom links on the website called something like "Legal Information", which resulted in a pop-up saying something like "This is just demo. There is no legal information on the demo page". I contacted Chase Bank, as well as the Dean and Student Accounts of my college, since it mentioned my student accounts, (I was worried some other students might receive this email).
Is there anyone else I should contact? And because I opened the email, followed the link, and clicked "Legal Information", will I get a virus? Will the frauds be able to get any information off my computer, or from my email account?
Thank you for your help —Preceding unsigned comment added by 74.104.142.6 ( talk) 23:05, 12 August 2010 (UTC)
I'm looking for a movie making software for a beginner. It should give me more options than Windows Movie Maker but still easy to learn and use. Comparison of video editing software does not include how easy the software is to use so I would like some recommendations. thanks F ( talk) 23:09, 12 August 2010 (UTC)