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AndreaBarisani's profile
Andrea Barisani
Andrea Barisani
Andrea Barisani
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@AndreaBarisani

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Andrea BarisaniVerified account

@AndreaBarisani

Head of Hardware Security - F-Secure ■ Founder - Inverse Path

Trieste
andrea.bio
Joined August 2014

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    1. Joel Eriksson‏ @OwariDa 7 Jan 2015

      USBArmory talk from 31C3. http://media.ccc.de/browse/congress/2014/31c3_-_6541_-_en_-_saal_2_-_201412281730_-_forging_the_usb_armory_-_andrea_barisani.html#video&t=328 … Using SSH fingerprints to authenticate the host = Obviously susceptible to MITM!

      2 replies 1 retweet 2 likes
      Andrea Barisani‏Verified account @AndreaBarisani 7 Jan 2015
      Replying to @OwariDa

      @OwariDa how exactly? The whole point of caching ssh server fingerprints is to prevent MITM.

      1:24 PM - 7 Jan 2015
      3 replies 0 retweets 0 likes
        1. Joel Eriksson‏ @OwariDa 8 Jan 2015
          Replying to @AndreaBarisani

          @AndreaBarisani Just set up a proxy that connects to the real host.

          0 replies 0 retweets 0 likes
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        1. New conversation
        2. Joel Eriksson‏ @OwariDa 8 Jan 2015
          Replying to @AndreaBarisani

          @AndreaBarisani Yes, it works in the context of SSH, but not in the USBArmory scenario when the device just wants to verify the host.

          1 reply 0 retweets 0 likes
        3. Andrea Barisani‏Verified account @AndreaBarisani 8 Jan 2015
          Replying to @OwariDa

          @OwariDa the verification will be performed in the context of SSH, USB Armory will SSH back to the host as we have TCP/IP connection

          1 reply 0 retweets 0 likes
        4. Joel Eriksson‏ @OwariDa 8 Jan 2015
          Replying to @AndreaBarisani

          @AndreaBarisani Yes, but will all subsequent interaction with the host be performed over SSH as well?

          3 replies 0 retweets 0 likes
        5. Andrea Barisani‏Verified account @AndreaBarisani 8 Jan 2015
          Replying to @OwariDa

          @OwariDa protection is to ensure your own laptop is connected, subsequent interactions will have their own authentication mechanisms

          1 reply 0 retweets 0 likes
        6. Joel Eriksson‏ @OwariDa 8 Jan 2015
          Replying to @AndreaBarisani

          @AndreaBarisani If the real host is reachable on a public IP, one could just proxy the connection to that host. Don't you see the problem?

          2 replies 0 retweets 0 likes
        7. Andrea Barisani‏Verified account @AndreaBarisani 8 Jan 2015
          Replying to @OwariDa

          @OwariDa followup over email, I much prefer constructive dcomments/questions rather than criticism about something we have yet to develop ;)

          1 reply 0 retweets 0 likes
        8. Joel Eriksson‏ @OwariDa 8 Jan 2015
          Replying to @AndreaBarisani

          @AndreaBarisani E-mail sent now. :) Btw, the USBArmory concept itself is absolutely awesome, my critique is supposed to be constructive.

          1 reply 0 retweets 0 likes
        9. Andrea Barisani‏Verified account @AndreaBarisani 8 Jan 2015
          Replying to @OwariDa

          @OwariDa thanks! And I do much appreciate the feedback.

          0 replies 0 retweets 0 likes
        10. End of conversation
        1. Andrea Barisani‏Verified account @AndreaBarisani 7 Jan 2015
          Replying to @AndreaBarisani

          @OwariDa the process of verifying ssh fingerprints is not a mere comparison but specifically intended to validate server public key

          0 replies 0 retweets 0 likes
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