This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Does firefox offer 128 bit encription?

  • 2 cavab
  • 2 have this problem
  • 10 views
  • Last reply by cor-el

more options

Credit card company says I do not have 128 bit encryption on my browser (Firefox). Is it available? Internet Explorer has 128 bit. Please advise.

Credit card company says I do not have 128 bit encryption on my browser (Firefox). Is it available? Internet Explorer has 128 bit. Please advise.

All Replies (2)

more options

Yes, Firefox will do 128-bit encryption. You can see it on this page, just click the blue mozilla.com site identity button in the URL bar, and then hit More Information... See the Technical Details at the bottom of that Page Info window.

more options

Firefox uses AES-56 (256 bit encryption) if websites support it.
128 bit encryption is no longer recommended these days as a lot of such ciphers have been cracked during the past years.
I keep all 128 bit ciphers disabled to force websites to use stronger encryption.