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ஆதரவு மன்றம்

I wish to change my UUID

  • 10 replies
  • 1 இந்த பிரச்சனை உள்ளது
  • Last reply by Compaq
பதிவிடப்பட்டது

Hello everybody,

I am not completely sure that my issue is browser-related: in case, please remove this post at once. I want to know if there is a way to change the UUID of a computer, without uninstalling and reinstalling the browser every time. The UUID can be used to identify operations carried out by the same computer: even if the user deletes all the cookies and changes his/her IP address, the UUID will always identify "that" computer as the same computer that one day connected to Wikipedia, then to Google Image Search, then to XYZ's webmail portal etc etc... One would always be tracked, even if connecting through an open WiFi network and deleting all the cookies between sessions. Navigation can be "anonymous", but only in a relative way, because it is sufficient that the user is identified by name only once (for example when connecting to Facebook or other non-anonymous service) and the UUID will be linked to his/her name FOREVER!!...

Thank you very much.

Hello everybody, I am not completely sure that my issue is browser-related: in case, please remove this post at once. I want to know if there is a way to change the UUID of a computer, without uninstalling and reinstalling the browser every time. The UUID can be used to identify operations carried out by the same computer: even if the user deletes all the cookies and changes his/her IP address, the UUID will always identify "that" computer as the same computer that one day connected to Wikipedia, then to Google Image Search, then to XYZ's webmail portal etc etc... One would always be tracked, even if connecting through an open WiFi network and deleting all the cookies between sessions. Navigation can be "anonymous", but only in a relative way, because it is sufficient that the user is identified by name only once (for example when connecting to Facebook or other non-anonymous service) and the UUID will be linked to his/her name FOREVER!!... Thank you very much.

தீர்வு தேர்ந்தெடுக்கப்பட்டது

Hi

To answer your questions:

Philipp is spot on in saying that there is no Unique User ID number in your copy of Firefox.

Your computer may have a UUID which is stored in the BIOS. You cannot see it in Firefox. You may be able to see it in your operating system, but that is outside of the scope of this forum to comment on - you will be able to get much better support on this matter from a Windows XP support forum.

Likewise with viewing and changing information in the BIOS. This is well beyond what we support here and is something that I would recommend studying several sources of information (and doing a full backup and making sure you have recovery media to hand) before attempting.

If you have a support question about Firefox, please ask and we will do our best to help but I think that the questions you are asking are probably best answered in other more specialist forums

Read this answer in context 1

Additional System Details

நிறுவப்பட்ட நிரல்கள்

  • Shockwave Flash 11.1 r102
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
  • DRM Netscape Network Object
  • Npdsplay dll
  • DRM Store Netscape Plugin
  • Adobe PDF Plug-In For Firefox and Netscape
  • RealJukebox Netscape Plugin
  • RealPlayer(tm) LiveConnect-Enabled Plug-In
  • 6.0.12.1698
  • npdivxplayerplugin

பயன்பாடு

  • User Agent: Mozilla/5.0 (Windows NT 5.1; rv:18.0) Gecko/20100101 Firefox/18.0

கூடுதல் தகவல்

philipp
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  • Moderator
5269 தீர்வுகள் 23294 பதில்கள்
பதிவிடப்பட்டது

hi, firefox does not contain any particular uuid that it would make available to websites. however from your system details it appears that you are using a very outdated version of firefox and a very outdated version of flash which are both affected by many dozens of critical security vulnerabilities which are taken advantage of by every exploit kit out there.

i'm not sure that the normal advice to update firefox to the latest version & update your plugins as soon as possible would work here, since your system might already be heavily compromised...

hi, firefox does not contain any particular uuid that it would make available to websites. however from your system details it appears that you are using a very outdated version of firefox and a very outdated version of flash which are both affected by many dozens of critical security vulnerabilities which are taken advantage of by every exploit kit out there. i'm not sure that the normal advice to [https://www.mozilla.org/firefox/update/ update firefox to the latest version] & [https://www.mozilla.org/en-US/plugincheck/ update your plugins] as soon as possible would work here, since your system might already be heavily compromised...
பதிவிடப்பட்டது

கேள்வியின் உரிமையாளர்

Hi, here is a more recent version of Firefox. Pardon me for stressing about the core of my question, but it's the very concept of UUID that is not completely clear to me. I can't understand whether the UUID depends on some hardware serial mumber (like a MAC address for example), on the specific installation of the browser, or on both of them. I could observe that, from time to time, I receive a cookie that is either named "UUID" or contains the word "UUID" followed by a long HEX number. Reading here and there on the web, it seems that the UUID is formed by two parts, one that never changes and one that may change: did I understand right? So it seems that UUID is a sort of numberplate, or tag, that one can never change completely. If that's correct, I don't like it at all.

Hi, here is a more recent version of Firefox. Pardon me for stressing about the core of my question, but it's the very concept of UUID that is not completely clear to me. I can't understand whether the UUID depends on some hardware serial mumber (like a MAC address for example), on the specific installation of the browser, or on both of them. I could observe that, from time to time, I receive a cookie that is either named "UUID" or contains the word "UUID" followed by a long HEX number. Reading here and there on the web, it seems that the UUID is formed by two parts, one that never changes and one that may change: did I understand right? So it seems that UUID is a sort of numberplate, or tag, that one can never change completely. If that's correct, I don't like it at all.

Compaq மூலமாக திருத்தப்பட்டது

philipp
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5269 தீர்வுகள் 23294 பதில்கள்
பதிவிடப்பட்டது

there is no uuid concept in firefox and websites cannot access your mac-address. when they set a "uuid" cookie that will be an arbitrary one - if you clear such a cookie, you will receive a totally different one the next time.

sure, there are certain advanced way of tracking users by fingerprinting their browser (see https://panopticlick.eff.org/ for some information about this) but if you are concerned about your security and privacy there are far more urgent issues with your current setup as i have described in my first answer.

there is no uuid concept in firefox and websites cannot access your mac-address. when they set a "uuid" cookie that will be an arbitrary one - if you clear such a cookie, you will receive a totally different one the next time. sure, there are certain advanced way of tracking users by fingerprinting their browser (see https://panopticlick.eff.org/ for some information about this) but if you are concerned about your security and privacy there are far more urgent issues with your current setup as i have described in my first answer.
cor-el
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17277 தீர்வுகள் 156160 பதில்கள்
பதிவிடப்பட்டது

There is only an UUID for crash reports, but as written above there are scripts around the internet to fingerprint the browser. You can remove the cookies from a website to make the website forget about you.

There is only an UUID for crash reports, but as written above there are scripts around the internet to fingerprint the browser. You can remove the cookies from a website to make the website forget about you.
பதிவிடப்பட்டது

கேள்வியின் உரிமையாளர்

cor-el said

There is only an UUID for crash reports, but as written above there are scripts around the internet to fingerprint the browser. You can remove the cookies from a website to make the website forget about you.

Question: what about fingerprinting if I use a "portable" browser, deleting it completely from the USB stick between two sessions (i.e. copying it to the USB stick from a source folder)? Would that prevent tracking the computer from session to session?...

''cor-el [[#answer-879490|said]]'' <blockquote> There is only an UUID for crash reports, but as written above there are scripts around the internet to fingerprint the browser. You can remove the cookies from a website to make the website forget about you. </blockquote> Question: what about fingerprinting if I use a "portable" browser, deleting it completely from the USB stick between two sessions (i.e. copying it to the USB stick from a source folder)? Would that prevent tracking the computer from session to session?...
Seburo
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689 தீர்வுகள் 5043 பதில்கள்
பதிவிடப்பட்டது

Hi

I think it is important to echo the point made by philip that you are using outdated, old and possibly insecure copies of Firefox and Flash. Updating both of these (as per the links mentioned in the earlier post) is strongly recommended.

To change a UUID for a Windows based computer, you will need to access the BIOS. Before doing so, I recommend you consult several specialist security or Windows forum who will be able to provide further guidance on this delicate operation and that you back up all your data beforehand.

Fingerprinting is again a specialist topic that the EFF (who produced the Panopticlick service) has further guidance.

I hope this helps. Please update you copy of Firefox and Flash as soon as possible.

Hi I think it is important to echo the point made by philip that you are using outdated, old and possibly insecure copies of Firefox and Flash. Updating both of these (as per the links mentioned in the earlier post) is strongly recommended. To change a UUID for a Windows based computer, you will need to access the BIOS. Before doing so, I recommend you consult several specialist security or Windows forum who will be able to provide further guidance on this delicate operation and that you back up all your data beforehand. Fingerprinting is again a specialist topic that the EFF (who produced the Panopticlick service) has further guidance. I hope this helps. Please update you copy of Firefox and Flash as soon as possible.
Corey 'linuxmodder' Sheldon 21 தீர்வுகள் 223 பதில்கள்
பதிவிடப்பட்டது

Another defense against full 'fingerprinting' of browser is DON'T USE fullscreen... For things like tor browser which is a heavily modified firefox instance fullscreen is not the default for this among other reasons.

Another defense against full 'fingerprinting' of browser is DON'T USE fullscreen... For things like tor browser which is a heavily modified firefox instance fullscreen is not the default for this among other reasons.
பதிவிடப்பட்டது

கேள்வியின் உரிமையாளர்

I beg you pardon folks, but I'm getting more and more confused... Apart from updating the browser, I mean, the concepts behind UUID and fingerprinting remain quite foggy to me.

Philipp wrote: "there is no UUID concept in firefox". Seburo wrote: "To change a UUID for a Windows based computer, you will need to access the BIOS."

So, if I understood it right, there is an UUID stored somewhere in the system (where?), but Firefox would not make it visible outside? And what "determines" the UUID? Does it depend on some random number generated at BIOS or operating system installation/first run?

[confused mode ON]

I beg you pardon folks, but I'm getting more and more confused... Apart from updating the browser, I mean, the concepts behind UUID and fingerprinting remain quite foggy to me. Philipp wrote: "there is no UUID concept in firefox". Seburo wrote: "To change a UUID for a Windows based computer, you will need to access the BIOS." So, if I understood it right, there is an UUID stored somewhere in the system ('''''where?'''''), but Firefox would not make it visible outside? And what "determines" the UUID? Does it depend on some random number generated at BIOS or operating system installation/first run? [confused mode ON]
Seburo
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689 தீர்வுகள் 5043 பதில்கள்
பதிவிடப்பட்டது

தீர்வு தேர்ந்தெடுக்கப்பட்டது

Hi

To answer your questions:

Philipp is spot on in saying that there is no Unique User ID number in your copy of Firefox.

Your computer may have a UUID which is stored in the BIOS. You cannot see it in Firefox. You may be able to see it in your operating system, but that is outside of the scope of this forum to comment on - you will be able to get much better support on this matter from a Windows XP support forum.

Likewise with viewing and changing information in the BIOS. This is well beyond what we support here and is something that I would recommend studying several sources of information (and doing a full backup and making sure you have recovery media to hand) before attempting.

If you have a support question about Firefox, please ask and we will do our best to help but I think that the questions you are asking are probably best answered in other more specialist forums

Hi To answer your questions: Philipp is spot on in saying that there is no Unique User ID number in your copy of '''Firefox'''. Your '''computer''' may have a UUID which is stored in the BIOS. You cannot see it in Firefox. You may be able to see it in your operating system, but that is outside of the scope of this forum to comment on - you will be able to get much better support on this matter from a Windows XP support forum. Likewise with viewing and changing information in the BIOS. This is well beyond what we support here and is something that I would recommend studying several sources of information (and doing a full backup and making sure you have recovery media to hand) before attempting. If you have a support question about Firefox, please ask and we will do our best to help but I think that the questions you are asking are probably best answered in other more specialist forums
பதிவிடப்பட்டது

கேள்வியின் உரிமையாளர்

Thank you very much! Indeed, I didn't want to go off-topic with my question, but as I said, I wasn't sure if the UUID is something Firefox-related, computer- related, none, or both. :o)

Thank you very much! Indeed, I didn't want to go off-topic with my question, but as I said, I wasn't sure if the UUID is something Firefox-related, computer- related, none, or both. :o)