Take the 2-minute tour ×
Information Security Stack Exchange is a question and answer site for Information security professionals. It's 100% free, no registration required.

During traveling, especially in poor countries, sometimes you are going to need to use the internet at an internet cafe and you really can't be sure whether anyone has installed anything to listen to your keystrokes.

I've been told this method, although I'm not sure if this works, but if you're at an internet cafe, one way to fool any key loggers is to avoid typing your password in one go. Instead type part of your password, then insert some random letters, then use your mouse to highlight over the random letters, and then overwrite them. This supposedly fools the key loggers into thinking your password has those random letters in it.

So just wondering, does this actually work? Are there any other better methods I could use?

share|improve this question

migrated from superuser.com Aug 15 '11 at 18:05

This question came from our site for computer enthusiasts and power users.

1  
bring a portable linux stick with you. –  bckbck Aug 15 '11 at 15:02
4  
I think the keylogger term got too popular compared to the alternative methods to obtain your password which don't involve logging keys at all. In fact, there is now a trend of calling unrelated trojans and viruses as "keylogger". Just keep in mind that the easiest way to get a specific password doesn't involve logging any keys. –  Andreas Bonini Aug 15 '11 at 15:34
    
related: superuser.com/questions/323111/… –  akira Aug 16 '11 at 8:45
    
related: security.stackexchange.com/questions/6248/… –  akira Aug 16 '11 at 8:48
    
typing in the password is a very good trick, thanks! –  Tomas Sep 8 '11 at 15:42

21 Answers 21

In addition to what's already said, you might consider carrying around a small usb stick containing the bootable TAILS OS (short for The Amnesic Incognito Live System) which routes all your internet traffic through Tor by default, and doesn't store anything on the local hardware as everything done on it is erased after a reboot.

If you'd rather prefer the fact that you're using Tor stays unknown from the local network admin/ISP/government; you should configure Tor/Tails to use Bridge Mode

Note however Tor isn't a silver bullet solution for everything and you should read the appropriate documentation before trusting any software with sensitive information.

In addition, because of Tor's architecture username/password information can be observed by the third hop in its obfuscation network (in whats termed an exit node) so you should be using HTTPS to prevent this.[*] Try the EFF's HTTPS Everywhere extension to make it easier.

[*] For an example: wired dot com/politics/security/news/2007/09/embassy_hacks?currentPage=all

share|improve this answer

I have a old method which is very simple,but effective. Get a pendrive and open a .txt file on your pendrive.This text file will contain your online account passwords.Always use a password generator tool to generate your password.After that just copy the password in the .txt file with copy+paste method.In the internet cafe,just plug in your pendrive and copy+paste the passwords you need.With this simple method your password remains safe from keyloggers.

share|improve this answer
    
Many existing keyloggers intercept the clipboard and can log copy-pasted passwords. –  Adnan Dec 16 '13 at 10:55

Bring your own device and use an encrypted connection.

share|improve this answer

All the keystorkes that logged by a keylogger are typed. If you use some software or your computer remember your passwords, they will not be captured.

share|improve this answer
1  
This isn't actually true. Keyloggers come in all shapes and sizes, hardware and software and may intercept keystrokes at various points. –  Rory Alsop Oct 12 '11 at 13:46

I can see two ways:

  1. Use some virtual keyboard solution. You can type your password with mouse-clicks, it will avoid keyboard logger (but may not avoid mouse-click based logger). However, it would be one level of security.

  2. You would just type a wrong password into the password box, select it with the mouse (replacing the wrong keys with the true); type the first 3 characters of the true password, type 3 wrong keys, select the last 3 invalid characters and then type the 3 correct keys replacing the invalid keys.

share|improve this answer
7  
Note, if say there was a javascript extension installed on the web browser (like lazarus) that was say recording everything entered in a html forms, neither method would work. (They would avoid hardware keyloggers). –  dr jimbob Aug 15 '11 at 18:20
    
As I said, this would be one "layer" of security. It is not the final solution, but i think it would be a part of it. –  Diogo Aug 15 '11 at 18:25
    
I don't think they would be part of the best solution: bring hardware you can trust. I guess they can be part of the next best alternative of booting into an OS off a live cd/usb that you brought and can trust. Otherwise its a very weak layer of security, like changing your ssh port to 1022 while leaving an login/password combination of root/root valid; or thinking you are safe from MITM attacks using https without a CA signed certificate. –  dr jimbob Aug 15 '11 at 19:36
1  
If the keylogger is hooking the keyboard interrupt, wouldn't it get the keys typed in the vr keyboard? –  Andrew Neely Aug 15 '11 at 20:16
5  
Eek. Neither of StickBump's proposed solutions are secure; they are very easy to defeat, and some existing malware already does so. Do not follow this advice! It is not safe. –  D.W. Aug 16 '11 at 2:26

If you are signing in a social networking site like Facebook make sure that the address bar contains facebook.com and not facebook-home.com or similar, it is the case of phishing. If you are using mozilla firefox, go to tools then security options- from there you can check that your password is removed from the memory or not after you have closed your account.

share|improve this answer
1  
Keep in mind that this won't prevent a key logger from doing it's thing. Key loggers reside on the machine the user is using - not on the remote site (i.e. facebook-home.com) and they may not necessarily make use of the browser's cache. Typically they are implemented at a lower level, for example, catching the events sent to the operating system when a user presses a key. –  bethlakshmi Aug 16 '11 at 20:16

You could forward all your email to a temporary account, which you then delete upon your return. This will limit possible exposure to interception of the emails sent while you were away, and hijacking of the temporary account.

Because you can turn off forwarding from your real account, you can disable the temporary account as soon as you notice it's been compromised.

This isn't a perfect solution, but it gives you some protection even if your attacker manages to steal your password.

share|improve this answer

What you have suggest is probably the best way to enter your password. The keylogger usually will be interpreted by a human and if your password does not makes sense intself (as another user pointed out) but your trick it too. That will make it quite hard to guess your password. I would do the same to my username as well.

share|improve this answer

I see a lot of Banks do this. Their password fields can only be populated by typing on an on screen keyboard which is randomly positioned on the page. So no keys are clicked instead only mouse clicks. Further, if the password is 8 characters long, they only ask you to type certain characters so you may see something like X00XXX0 where only the password characters represented by the 0's are required to be typed on the screen keyboard.

The combo of randomly positioned on screen keyboard and mouse-click and randomly selected characters to be typed rendered any mouse click positions which may have been logged useless.

Regards,

share|improve this answer
    
I dunno, cheap keyloggers I saw bloody 6 years ago had screen capturing abilities, so really: I just need you to log in a few times. Or be an even bigger jerk and capture events in IE. –  StrangeWill Oct 31 '11 at 16:43

If you use openid and something like a yubikey that uses a onetime password even if they do take your password they can't reuse it

the problem is usb port access

the yubikey shows up as a usb keyboard so no admin level drivers are needed

share|improve this answer

There are some good suggestions here.

To them, I would add the suggestion that you change your password using a trusted internet connection at the next opportunity. Even if someone manages to get your password, it's possible that you could change it before it could be used. This is especially true if they're using a hardware keylogger that they have to come back and retrieve at a later date.

Once I was in an airport far from home, and I realized the wi-fi network I was connected to might not have been legitimate. I had logged into GMail while connected to the network, so just to be on the safe side, I called a family member on my cell phone, told them my GMail password and had them change it to something else. They wrote down the new password they chose (without telling it to me over the phone), and I got it from them when I got back home.

share|improve this answer

There several threats you are dealing with; but fundamentally what you are asking -- using potentially malicious hardware -- is unsafe and should be avoided for sensitive purposes. (E.g., try not to check into your bank account on vacation). However, if you are willing to take that risk but want to minimize it, here are your threats:

  1. Hardware keyloggers. A simple attachment at the back of the keyboard purchased for under $30 can store every keypress; so you'd see someone going to a site, typing a login, and then typing a password and could easily decipher it later. It wouldn't be difficult to modify an off-the-shelf keyboard to automatically do this internally; so don't believe you are safe because you don't see an attachment in the back.

  2. Software keyloggers. The OS could be running a keylogger/mouse-logger/screen capture routine that could in principle replay every action you do.

  3. A spoofed DNS/corrupted with fake certificates installed on the browser for a MITM, even to SSL sites.

  4. A browser extension/hack that records all text typed into the html form field (including passwords).

  5. Someone monitoring unencrypted network traffic, where your password/authentication cookies are sent in plaintext -- make sure you are using SSL (with proper certificates to prevent MITM).

Of these #5 is the simplest to prevent; use a ssh/vpn tunnel for unencrypted sites or use HTTPS (with SSL) to sites signed by a proper certificate.

Your best option again is to use your own hardware (bring a smartphone; cheap netbook/tablet with you) -- that eliminates threats #1-#4; and standard good practices prevents #5.

Your second best option would be to boot into a guest OS of your choice off of your own live cd, and then use a method like your own to obscure your password to a keylogger. That is maybe type half the characters (not necessarily in order; and cut and paste the other half from letters on the web page/URL -- preferably do this only using the mouse--e.g., in gnome if you select a character you can paste it with a middle mouse click). Using a live cd, prevents #2 & #3 & #4. You are still vulnerable to #1, but you can probably suitably obscure your password to an ordinary keylogger that while they may have recover a partial password, they wouldn't have the whole thing (I also wouldn't do the entire password from cut and paste in case they are recording/cloning the video being displayed on the monitor). I'd still recommend changing your password once you get back home.

If you resort to not being able to boot into a guest OS; I'd consider any data entered compromised. You could do something to make it a bit more difficult (e.g., download and run a new web browser; try obscuring your password by typing it out of order/cut and pasting parts; etc.), but in principle they could get the data if they wanted.

share|improve this answer
    
+1 for using a threat based approach for determining an appropriate security control. –  Christoffer Aug 16 '11 at 14:12

Key Loggers are executed on your local machine and will work regardless of what internet connection your using,

The problem you have in an internet cafe is man in the middle attacks, where other network peers can intercept your network traffic.

Make sure you use HTTPS sites where you can, all traffic is encrypted before it leaves your machine, most logins on "decent" sites will use HTTPS and some sites will let you browse the whole site in HTTPS but always check that before your about to enter anything you wouldn't want another person to see that the page is indeed HTTPS, And if you ever go to a site that has a Self Signed SSL certificate then be very very wary of it as it could also be a Man in the middle attack I know firefox and IE report to you if the page has self signed certificate.

share|improve this answer
1  
At a cafe where the machines are probably hacked, it's possible that the browser has fake CAs installed so that you don't get warnings from bogus https sites. IMO, https is useless here. –  bstpierre Oct 28 '11 at 23:55

What I usually do is load ubuntu live onto USB flash, pick a computer in the corner where the caffe owner can't see, insert the USB flash and reboot into ubuntu. What I get is a safe environment.

share|improve this answer

I would go with one time passwords. Some sites do provide on-screen virtual keyboards(which change the location every time you click), but if there are key loggers, there is a high chance that there could be spyware present.

So, I would not choose to use a thumb drive which stores the sensitive information like passwords and SSN.

share|improve this answer

If you can't be sure that your keystrokes aren't captured (and you can't), use any sort of two factor authentication.

Make sure your password isn't useful by itself!

The only way to be sure that your data is secure is to avoid entering "everything" into the suspicious machine.


Given that keyloggers are your only concern (i.e. no sophisticated tracking software):

For example, you could carry a USB drive with all your important passwords in a KeePass container, together with KeePass Portable. Once you've opened KeePass Portable, use a master password for the KeePass container. Yes, you will risk that it is captured, but to unlock the container, you can also configure KeePass to use a keyfile as well. Without this keyfile, the master password is useless. This keyfile could be stored on the same thumb drive or on another one that you carry separated from the original thumb drive.

Once you've opened your KeePass container, you can make use of KeePass features that allow you to enter passwords without typing:

  • KeePass can minimize itself and type the information of the currently selected entry into dialogs, webforms, etc. Of course, the typing-sequence is 100% user-customizable, read the documentation file for more.
  • KeePass features a global auto-type hot key. When KeePass is running in the background (with opened database) and you press the hot key, it looks up the correct entry and executes its auto-type sequence.

This however doesn't fool a keylogger that listens for the keyboard buffer. A keylogger built into the keyboard connection would be useless though.

A better alternative:

  • All fields, title, username, password, URL and notes can be drag&dropped into other windows.

By doing this, you eliminate the need to type any password except for your master password, which you can always "throw away" and change if you need to.

share|improve this answer
16  
you should have stopped after "make sure your password isn't useful by itself!". i would never attach an usb-stick with sensitive data to a box i don't know and THEN DECRYPT IT. –  akira Aug 15 '11 at 14:29
    
Well, depends on how sensitive the data is. And: If we're talking keyloggers only, this is definitely a way to overcome the issue of having passwords sniffed. –  slhck Aug 15 '11 at 14:32
4  
if you can not trust the medium: do not decrypt ANY information. not truecrypt containers, not keepass containers, nothing. if the data is not sensitive then why encrypt it in the first place? it's like protecting your credit card within a bulletproof box and then hand it over to a guy you dont know which 'just checks the card in the other room'... –  akira Aug 15 '11 at 14:35
2  
KeePass will not work in this situation - the 'auto-type' feature is just that - it injects characters into the same keyboard buffer that the key-logger is monitoring. –  CJM Aug 15 '11 at 15:11
    
@CJM Yes, drag & drop would work though. It's not a perfect solution though, I'll admit that. –  slhck Aug 15 '11 at 15:56

If the cafe does Not use wireless encryption in the router, then you are not safe using any OS, boot stick or otherwise, choose a cafe that uses wireless encryption and a password to connect to their hotspot router.

Unencrypted wireless connections can be sniffed easily by anyone in or near the cafe, this will reveal anything you send over the connection including logins and passwords you enter into a browser.

share|improve this answer
    
even if the wireless is not encrypted, https still encrypts the communication for all practical purposes –  Dan Aug 15 '11 at 17:09
1  
Also, I'm pretty sure that even if an attacker can't break the encryption, wireless encryption is only useful if an attacker doesn't have the password. If an establishment gives you the password for their encrypted wifi, and then an attacker comes in and they give them the password too, then you are just as vulnerable to the attacker as you would be if the network was not encrypted. –  Joshua Carmody Aug 15 '11 at 18:42

You are conflating two unrelated issues. A keylogger is a program that has been installed on your computer to monitor the actual keystrokes as you make them. It has nothing to do with a cafe or other public network. If your machine has been hacked then you have bigger worries, but the method you mention might confuse a simple keylogger.

What you need to worry about on a public wifi network is other machines sniffing your network packets and seeing what you are sending. You can protect against that by only using secure web sites that are SSL enabled so the connection is encrypted.

share|improve this answer
    
codebutler.com/firesheep –  deizel Aug 15 '11 at 15:52
1  
"A keylogger is a program that has been installed on your computer to monitor the actual keystrokes as you make them." There are hardware key loggers too keelog.com –  StuperUser Aug 15 '11 at 16:37
    
@deizel, why did you post that link? It is pointing out sites that do not use ssl are insecure. That's exactly what I said. –  psusi Aug 15 '11 at 17:20
    
@psusi - A keylogger has everything to do with OPs post. He's referring to using the Cafe's computers at the cafe, not his own computer at the cafe. –  Safado Aug 15 '11 at 22:58

if you do not trust the medium: do not enter sensitive information. typing in your password in some obscure way is just that: security through obscurity, which never works.

other than that: you might be able to achieve some level of security in such open places if the password you entered changes for the next login, see one-time-passwords. (note: '2-factor-authentification is a hybrid scheme where you know already one half of the password (which keeps constant / static) and then you get the other half by sms or any other means; that 2nd half is a one-time-password)

share|improve this answer
11  
"security through obscurity, which never works." Except when it does. This line is always repeated, but security through obscurity is probably quite effective in many situations, such as this one. If one user obscures their data, and the other hundreds don't, are they going to bother to un-obscure it? –  Jeremy Banks Aug 15 '11 at 22:56
1  
Maybe he can't control the authentication methods. For example, I'm not sure if you can use sms-based password to log in to Google. –  Louis Rhys Aug 16 '11 at 1:40
    
@Jeremy Banks: the point is that it helps "eventually". i am not interested in "eventual they do not sniff my stuff", i want to be SURE. and i can not be sure if i have actually entered the authentification, even in some obscure way. –  akira Aug 16 '11 at 6:40
5  
@Louis you can. From your google account settings, you can activate 2-step activation. –  Dunaril Aug 16 '11 at 8:11
1  
@akira - but you do not have better solution to the problem! The typing-in-the-password method is the best you can do. It is a good idea, I cannot see why you disparage it? –  Tomas Sep 8 '11 at 15:45

You could boot to a Linux live usb. Unless the key-logger is hardware based this will be safe. The Air Force has a distro that is designed for this very purpose. It does not mount the local hard drives so nothing can be saved locally. The distro is called LPS (lighweight portable security). I use it daily. You can download it here

share|improve this answer
1  
I don't think most web cafes would take very kindly to you booting your own OS. –  Kibbee Aug 15 '11 at 16:37
    
@ Kibbee get a machine in the back corner and try not to look suspicious? –  Zach Aug 16 '11 at 3:16
1  
And then, how do you connect to the web cafe's internet connection? Personal experience suggests that there is always some sort of a password required for connection in cafe's. The owner might not enjoy entering the same in an environment he does not recognize. –  Vaibhav Garg Sep 8 '11 at 11:14

Possible, though maybe not very practical solution.

Take your own PC, boot up in Linux and use the cyber cafe's net connection

Not many would allow you to do this, but some do

share|improve this answer
1  
yah, or just use your smartphone (or a *book) to access the wifi of the internet cafe and then establish an encrypted tunnel to your destination. –  akira Aug 15 '11 at 14:31
    
It's entirely practical (with a laptop), and it doesn't have to be linux. IMHO, this is the only valid solution. –  rjmunro Aug 15 '11 at 20:33
    
The reason I said linux was that many cybercafe's are teeming with windows viruses. They are less likely to attack a Linux system.(I guess a Mac would do as well) Personal experience is that once I connected a firewalled system with McAfee (basically corporate security) to a cybercafe wifi network. It was screwed in < 30 sec (infinite popups + unbootable) –  Akash Aug 17 '11 at 9:26
1  
@Akash: Plus, there are cd-bootable (thus physically read-only) Linux distros; I have yet to see a fully functional Windows install which boots from CD and is actually usable. –  Piskvor Sep 6 '11 at 12:27

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.