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Análises de CanvasBlocker

CanvasBlocker por kkapsner

4,5 de 5 estrelas
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462 análises
  • por zhaqenl, há 7 anos
  • por Usuário 13202285 do Firefox, há 7 anos
  • por The Beard Below My Chin, há 7 anos
    Nice works.
    Please note I test the audio fingerprint at https://audiofingerprint.openwpm.com/ and it causes browser slowdown.

    Resposta do desenvolvedor

    publicado há 7 anos
    I know - this page is not written in a peformant way. You can test the audio fingerprint at http://kkapsner.github.io/CanvasBlocker/test/audioTest.html as well.
  • por Usuário 14156124 do Firefox, há 7 anos
    Nice works.
    Please note it does not detect (and block) the code embedded in a url through the
    "data:text/html" directive.
    I don't know if this method it's exploitable in a web page

    example: paste the following code on your navigation bar
    (It's a dots wave single pixel plotter, so it uses getImageData and it works even if you block the readout API):

    edit: sample code moved to pastebin (sorry, pasting the code here does not works):
    https://pastebin.com/pFvdgKNN

    Resposta do desenvolvedor

    publicado há 7 anos
    Good point. I will see if this is exploitable. But please open an issue at https://github.com/kkapsner/CanvasBlocker/issues where we can discuss the implications and findings. Also communication is much easier there.
  • por GregDT, há 7 anos
  • por Clemens Ratte-Polle, há 7 anos
    Where can i test the success of CanvasBlocker?

    Does it make problems with twitter header image upload?
    i got probs

    Resposta do desenvolvedor

    publicado há 7 anos
    You can go to http://kkapsner.github.io/CanvasBlocker/test/test.html and check if the displayed hash changes on every reload.

    I know of no problems with twitter. But if you think that it is CB related please open an issue at https://github.com/kkapsner/CanvasBlocker/issues - there we can communicate much better.
  • por Jezze, há 7 anos
    Doesn't make my canvas fingerprint less unique. amiunique.org still tells me that my similarity ratio is below 0.1% which means I have a very unique canvas fingerprint.

    Resposta do desenvolvedor

    publicado há 7 anos
    In the default settings the canvas fingerprint is changed on every page reload (you can test that on http://kkapsner.github.io/CanvasBlocker/test/test.html). Yes - this makes the fingerprint unique but since it is not constant you cannot be tracked.

    If you want further information/discussion please open an issue on https://github.com/kkapsner/CanvasBlocker/issues where we can communicate nmuch easier.

    PS: similar issue on github: https://github.com/kkapsner/CanvasBlocker/issues/154
  • por Usuário 13835690 do Firefox, há 7 anos
    Thank you for this extension (and for keeping it opensource). Nowadays it's getting harder and harder to get a sense of real privacy. CanvasBlocker + AdGuard for Windows + Privacy Badger + HTTPS Everywhere + custom user.js helps me feel safer on a growing data collection frenzy.

    Resposta do desenvolvedor

    publicado há 7 anos
    You're welcome.
  • por Mozilla Dev, há 7 anos

    Resposta do desenvolvedor

    publicado há 7 anos
    Please provide a reason why you gave one star. Maybe I can fix the issue or improve CB with your input.
  • por Usuário 14072583 do Firefox, há 7 anos
    Does not work according to fingerprint test at https://panopticlick.eff.org/

    Resposta do desenvolvedor

    publicado há 7 anos
    What do you mean with "does not work"? Please open an issue at https://github.com/kkapsner/CanvasBlocker/issues where we can communicate better and therefore I can help better.
  • por ©®°˜, há 7 anos
    100% unique mean that is not really natural, canvas should not be unique but changed in order to be natural.
    Unique canvas fingerprints will do much worse.
    Is like you said you have a device that never exist.

    To better understand how this work :
    Google already have a full database with all kind of canvas signatures from all worldwide devices (iphone, android, computers, etc...), and if your canvas signature will not match on them database then you fail, it is a prove that your canvas is fake. If you try to spoof the signature then image pixel parameters will not match and again you fail so is almoust imposible to pass canvas.

    On default settings may make it pass the google test.

    For example google will not ask for SMS confirmation when a new gmail account is created because he trust the device you use.

    Most of people must understand why unique signatures is bad practice and all softwares that spoof parameters will make traking services to detect the device much easy

    Resposta do desenvolvedor

    publicado há 7 anos
    Please open an issue at https://github.com/kkapsner/CanvasBlocker/issues where we can discuss this. AMOs rating comments are too limited to have a good conversation.

    One small comment on unique signatures: they are not bad by itself as long as they are not persistend (i.e. the timestamp you connect to the server is very likely to be a unique signature but it's not persistent). This is the case in the CB default settings.
  • por Usuário 14039775 do Firefox, há 7 anos
  • por Usuário 14037398 do Firefox, há 7 anos
  • por Usuário 12808354 do Firefox, há 7 anos
    Works Fine
  • por Usuário 13965824 do Firefox, há 7 anos
    It's doing it's job
  • por Usuário 13954923 do Firefox, há 7 anos
    Excellent.
  • por Gummi, há 7 anos
    Can't seem to get version 0.4.4b working with Firefox ESR 52.7.2, there's just no icon visible anywhere on the UI.

    Edit: My bad! I remember that this addon had an icon before but nowadays it hasn't. Works great!

    Resposta do desenvolvedor

    publicado há 7 anos
    This Addon does not have an icon that is always visible. Only a fingerprint icon is displayed in the adress bar when some canvas data was faked for the web page. You can test at http://kkapsner.github.io/CanvasBlocker/test/test.html

    If you still think that it's not working properly try version 0.4.4a and open a new issue at https://github.com/kkapsner/CanvasBlocker/issues

    EDIT: no problem. Glad that it works for you.
  • por Usuário 13837360 do Firefox, há 8 anos
    Keep up the good work and thank you.
  • por Usuário 13870378 do Firefox, há 8 anos
  • por Usuário 13224783 do Firefox, há 8 anos
  • por Usuário 13793914 do Firefox, há 8 anos
    Not good. Had partial protection before installing add-on. This add-on makes my browser 100% unique.

    Resposta do desenvolvedor

    publicado há 8 anos
    Yes, in the standard settings of CB the fingerprint that is produced with CB is quite unique but not persistent. That means the browser itself (and therefore you) cannot be indentified by it. (The same issue was reportet on github: https://github.com/kkapsner/CanvasBlocker/issues/154 - if you want further informations you can explore the issues there or post a new one.)

    Also there are a lot of options which change the behaviour of CB (just mark the expert mode). If you want a less unique fingerprint you can use the "white" random number generator which will result in fingerprints similar to those of the Tor browser.
  • por Salsa, há 8 anos
  • por containers-everywhere, há 8 anos
  • por citizenserious, há 8 anos
  • por #98374, há 8 anos