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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. briankrebs‏Verified account @briankrebs 4 Jan 2019
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      Replying to @KimZetter @taviso @thedarktangent

      Exactly? Doesn't the passport have a smart chip built in? I believe it does, and in which case it would not be exactly like cloning a magstripe.

      1 reply 1 retweet 6 likes
    2. Kim Zetter‏Verified account @KimZetter 4 Jan 2019
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      Replying to @briankrebs @taviso @thedarktangent

      In the US, but not everywhere

      1 reply 0 retweets 1 like
    3. Stefano Zanero‏Verified account @raistolo 4 Jan 2019
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      Replying to @KimZetter @briankrebs and

      Most passports have a RFID chip as well as an optical band, no magstripes. But it’s the physical features of a passport that are difficult to clone. If you have a blank passport and the correct printing machines you can forge one. I don’t see why you would be cloning one.

      2 replies 0 retweets 4 likes
    4. Tavis Ormandy‏Verified account @taviso 4 Jan 2019
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      Replying to @raistolo @KimZetter and

      Right, that's my thought as well. I'm confused why someone would pay for valid passport dumps if nobody can verify them anyway? Maybe there is some way to verify them I'm not aware of?

      2 replies 0 retweets 3 likes
    5. Kim Zetter‏Verified account @KimZetter 4 Jan 2019
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      Replying to @taviso @raistolo and

      They can be verified if they have a signed chip - but the only place they actually ever get verified is at certain gov border crossings. Every other use of the passports does not involve verification - just visible inspection of photo/name

      1 reply 0 retweets 4 likes
    6. Tavis Ormandy‏Verified account @taviso 4 Jan 2019
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      Replying to @KimZetter @raistolo and

      That makes sense - but the chip cannot be cloned either, so doesn't that mean that the numbers are not that useful, because you can just forge any name/number combination?

      2 replies 0 retweets 3 likes
    7. Tim Dierks‏ @tdierks 4 Jan 2019
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      Replying to @taviso @KimZetter and

      As far as I can tell there's no way for a relying party to validate an identity/passport number pair, so the number is not an authenticator for the identity and thus there's not a material risk if the number is divulged. I don't see a material risk here.

      1 reply 0 retweets 5 likes
    8. Kim Zetter‏Verified account @KimZetter 4 Jan 2019
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      Replying to @tdierks @taviso and

      But they validate at border crossings based on previous entries. So if I enter a country, they scan the passport and database pops up showing previous activity with that passport. If the same number pops up but has different name, that would flag it.

      2 replies 0 retweets 1 like
    9. Tavis Ormandy‏Verified account @taviso 4 Jan 2019
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      Replying to @KimZetter @tdierks and

      The attack you're thinking of is you *want* to convince customs that you're someone else with a valid travel history, so you can't just make up a new name and number? Hmm, that sounds valid, but have you got an example why I wouldn't just be a first-time crosser?

      1 reply 0 retweets 2 likes
    10. Kim Zetter‏Verified account @KimZetter 4 Jan 2019
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      Replying to @taviso @tdierks and

      That's always a possibility. The bottom line is I don't really know all the ways this info could be useful, but the thieves are expert at coming up with uses for the data they steal. Marriott could have made it harder for them to devise uses, if it had encrypted the data.

      2 replies 0 retweets 5 likes
      Tavis Ormandy‏Verified account @taviso 4 Jan 2019
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      Replying to @KimZetter @tdierks and

      Not clear to me why they store it at all! Just trying to understand risk, I think it's low. Thieves need to have equipment to physically forge passport and want to cross border where they don't verify passport data, and want customs to think theyve crossed before for some reason.

      4:14 PM - 4 Jan 2019
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      • George V. Hulme Alex Hall 𝙼𝚊𝚛𝚔 𝚁𝚘𝚞𝚍𝚎𝚋𝚞𝚜𝚑
      4 replies 0 retweets 3 likes
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        2. Try Catch HCF‏ @TryCatchHCF 4 Jan 2019
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          Replying to @taviso @KimZetter and

          Forged / stolen passports is a big problem depending on your region. High demand,https://www.politico.eu/article/europes-fake-forged-stolen-passport-epidemic-visa-free-travel-rights/ …

          2 replies 1 retweet 3 likes
        3. Kim Zetter‏Verified account @KimZetter 4 Jan 2019
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          Replying to @TryCatchHCF @taviso and

          Great example. Thanks for posting that. We tend to assume that every country is using securely-made passports, but that's just not the case.

          1 reply 0 retweets 2 likes
        4. 10 more replies
        1. Kim Zetter‏Verified account @KimZetter 4 Jan 2019
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          Replying to @taviso @tdierks and

          Yes that's definitely the first question Marriott should answer - there may be a requirement to store in some countries, but I'm guessing this was laziness in the way that retailers used to store unencrypted credit card numbers for yrs until PCI requirements forced them to change

          0 replies 0 retweets 2 likes
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        1. 𝙼𝚊𝚛𝚔 𝚁𝚘𝚞𝚍𝚎𝚋𝚞𝚜𝚑‏ @MarkRoudebush 4 Jan 2019
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          Replying to @taviso @KimZetter and

          If a hotel did make a copy of other pages I guess some visa information might reveal the length of stay/ time away from home. Reaching here.

          0 replies 0 retweets 1 like
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        1. Matthew Bushey  🇨🇦‏ @MattBushey 4 Jan 2019
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          Replying to @taviso @KimZetter and

          When I was an asshole, before"reform" I could buy passports that would pass, that was shit 18 years ago. They faded by time I was 25 though as more electronics became avail. Names would be matched to peoples pics using a DMV (motor vehicle) insider, there could get ID to match.

          0 replies 0 retweets 0 likes
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