Re: [tor-talk] Facebook brute forcing hidden services

[Colin Mahns <colinmahns@xxxxxxxxxx>]

Thank you for doing this! I'm glad to see a site as huge as facebook has decided to start implementing a HS for their users. 

Colin

On October 31, 2014 8:35:50 AM EDT, Alec Muffett <alecm@xxxxxx> wrote:
>Hi - My nameÂs Alec, I work for Facebook and am the team lead for
>Facebook
>over Tor.
>
>Long story short: details will come out later, but we just did the same
>thing as everyone else: generated a bunch of keys with a fixed lead
>prefix
>("facebook") and then went fishing looking for good ones.
>
>I feel that we got tremendous lucky.
>
>    - alec
>
>On 10/31/14, 5:23 AM, "Mike Cardwell" <tor@xxxxxxxxxxxxxxxxxx> wrote:
>
>>https://www.facebook.com/notes/protect-the-graph/making-connections-to-fac
>>ebook-more-secure/1526085754298237
>>
>>So Facebook have managed to brute force a hidden service key for:
>>
>>https://urldefense.proofpoint.com/v1/url?u=http://facebookcorewwwi.onion/&;
>>k=ZVNjlDMF0FElm4dQtryO4A%3D%3D%0A&r=PKCvk5ihsZdnlobuFIuhTw%3D%3D%0A&m=CZ27
>>H74ab0d0fF2o5LtJoybnrPSp3tV2eaCxPdBkwxU%3D%0A&s=df412954e11b3460e9e27ad5ae
>>8cb307233465ec461aa8ca461b66a94e457dfc
>>
>>If they have the resources to do that, what's to stop them brute
>>forcing a key for any other existing hidden service?
>>
>>-- 
>>Mike Cardwell  
>>https://urldefense.proofpoint.com/v1/url?u=https://grepular.com/&k=ZVNjlDM
>>F0FElm4dQtryO4A%3D%3D%0A&r=PKCvk5ihsZdnlobuFIuhTw%3D%3D%0A&m=CZ27H74ab0d0f
>>F2o5LtJoybnrPSp3tV2eaCxPdBkwxU%3D%0A&s=d9b3aa4ee032ade1291d78d5505c434b554
>>faf83d500bf7760e23af875c29f57
>>https://urldefense.proofpoint.com/v1/url?u=https://emailprivacytester.com/
>>&k=ZVNjlDMF0FElm4dQtryO4A%3D%3D%0A&r=PKCvk5ihsZdnlobuFIuhTw%3D%3D%0A&m=CZ2
>>7H74ab0d0fF2o5LtJoybnrPSp3tV2eaCxPdBkwxU%3D%0A&s=d21764a1dcedecaf889635ab6
>>ca8300b1867a5084b7e78922ecdf0a911d9dfc4
>>OpenPGP Key    35BC AF1D 3AA2 1F84 3DC3   B0CF 70A5 F512 0018 461F
>>XMPP OTR Key   8924 B06A 7917 AAF3 DBB1   BF1B 295C 3C78 3EF1 46B4
>
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