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taviso's profile
Tavis Ormandy
Tavis Ormandy
Tavis Ormandy
Verified account
@taviso

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Tavis OrmandyVerified account

@taviso

Vulnerability researcher at Google. This is a personal stream, opinions expressed are mine.

California
taviso.decsystem.org
Joined April 2008

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    1. Tavis Ormandy‏Verified account @taviso 19 Dec 2018
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      Tavis Ormandy Retweeted

      To all the people telling me this will never happen, and I should stop trash talking 2FA (TOTP, SMS, etc *not* U2F). Please read this, then kindly apologise. https://twitter.com/josephfcox/status/1075391745502924801 …

      Tavis Ormandy added,

      This Tweet is unavailable.
      53 replies 364 retweets 878 likes
    2. Ruslan Kiyanchuk‏ @zoresvit 19 Dec 2018
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      Replying to @taviso

      You should stop trash talking 2FA. Keep trash talking SMS, TOTP, HOTP and other "2-step verification methods" as they are *not* 2FA 😜 Unfortunately, misnaming things with 2FA made it confusing for many people 🙁

      1 reply 0 retweets 2 likes
    3. Per Thorsheim‏Verified account @thorsheim 19 Dec 2018
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      Replying to @zoresvit @taviso

      Per Thorsheim Retweeted Per Thorsheim

      @evilproffy talked #PasswordsCon warned about this in 2015. But trashtalking anything 2FA except U2F / WebAuthn is a very dangerous path to follow. Not EVERYONE is interested in your 20 followers Instagram account with 2SV. Risk analysis FTW.https://twitter.com/thorsheim/status/1075426380559593474?s=21 …

      Per Thorsheim added,

      Per ThorsheimVerified account @thorsheim
      Hey @evilproffy, it feels like it was «yesterday» you talked about your Verification Code Forwarding Attack on phishing Gmail OTPs etc, but it was actually @ #PasswordsCon 2015 at Uni Cambridge, UK: https://youtu.be/PjGbtDmSGac  cc @jimfenton @lorenzofb @josephfcox @StigMjolsnes https://twitter.com/lorenzofb/status/1075400971717615617 …
      1 reply 0 retweets 1 like
    4. Tavis Ormandy‏Verified account @taviso 19 Dec 2018
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      Replying to @thorsheim @zoresvit @evilproffy

      I regularly hear "we must not call crappy things crappy, or people might not use the crappy thing". Sorry, but I reject that argument. 😛

      1 reply 0 retweets 8 likes
    5. Per Thorsheim‏Verified account @thorsheim 19 Dec 2018
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      Replying to @taviso @zoresvit @evilproffy

      Just trying to say there’s a scale between «crappy» & «secure», and "secure" = 🧞‍♂️🦄 If we were ALL to use nothing but the very best (secure) at any given time, then.... uh.... that's not possible.

      1 reply 0 retweets 1 like
    6. Tavis Ormandy‏Verified account @taviso 19 Dec 2018
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      Replying to @thorsheim @zoresvit @evilproffy

      I don't know, the minimum bar I would have for a phishing solution is that it solves phishing. If it doesn't solve phishing, I would call that crappy? Like, if you sold me a can opener that doesnt open cans, and told me, "look there is a scale between working and not working".

      1 reply 0 retweets 4 likes
    7. Per Thorsheim‏Verified account @thorsheim 19 Dec 2018
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      Replying to @taviso @zoresvit @evilproffy

      «It opens some cans, so at least you get something, which is better than nothing?» A Google Titan Key doesn’t solve phishing, it makes it harder because as an attacker I will probably need to get hold of the physical key. «Hi, I’m from corporate IT. I have a new key for you.»

      1 reply 0 retweets 0 likes
      Tavis Ormandy‏Verified account @taviso 19 Dec 2018
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      Replying to @thorsheim @zoresvit @evilproffy

      Umm, If you can't use phishing and have to use a non-phishing attack, then you've solved phishing. You understand that you can defeat SMS 2FA with phishing? I'm confused about your point.

      9:37 AM - 19 Dec 2018
      • 2 Likes
      • Jan Roger Wilkens J Y
      1 reply 0 retweets 2 likes
        1. New conversation
        2. Tavis Ormandy‏Verified account @taviso 19 Dec 2018
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          Replying to @taviso @thorsheim and

          "[U2F] doesn’t solve phishing [..] because an attacker [can] get the physical key" is just wrong. That *is* solving phishing. I think you're falling into the trap of false equivalency, like antibiotics aren't perfect and neither is homeopathy, so does it matter which one you use?

          1 reply 0 retweets 9 likes
        3. Per Thorsheim‏Verified account @thorsheim 19 Dec 2018
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          Replying to @taviso @zoresvit @evilproffy

          Ah. Phishing to me is not just digital, it is simply "tricking people", no matter physical or digital. WebAuthn solves a lot and I like it, but the human problem remains unsolved. Google employees knows not to hand out their Titan key. Most people do not.

          2 replies 0 retweets 0 likes
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