Slashdot Mirror


How the NSA Identified Satoshi Nakamoto (medium.com)

An anonymous reader shares a report: The 'creator' of Bitcoin, Satoshi Nakamoto, is the world's most elusive billionaire. Very few people outside of the Department of Homeland Security know Satoshi's real name. In fact, DHS will not publicly confirm that even THEY know the billionaire's identity. Satoshi has taken great care to keep his identity secret employing the latest encryption and obfuscation methods in his communications. Despite these efforts (according to my source at the DHS) Satoshi Nakamoto gave investigators the only tool they needed to find him -- his own words. Using stylometry one is able to compare texts to determine authorship of a particular work. Throughout the years Satoshi wrote thousands of posts and emails and most of which are publicly available. According to my source, the NSA was able to the use the 'writer invariant' method of stylometry to compare Satoshi's 'known' writings with trillions of writing samples from people across the globe. By taking Satoshi's texts and finding the 50 most common words, the NSA was able to break down his text into 5,000 word chunks and analyse each to find the frequency of those 50 words. This would result in a unique 50-number identifier for each chunk. The NSA then placed each of these numbers into a 50-dimensional space and flatten them into a plane using principal components analysis. The result is a 'fingerprint' for anything written by Satoshi that could easily be compared to any other writing. The NSA then took bulk emails and texts collected from their mass surveillance efforts. First through PRISM and then through MUSCULAR, the NSA was able to place trillions of writings from more than a billion people in the same plane as Satoshi's writings to find his true identity. The effort took less than a month and resulted in positive match.

23 of 427 comments (clear)

  1. Officially Freaked Out by manlygeek · · Score: 5, Insightful

    I'd love to meet Satoshi Nakamoto. He/she/they must be brilliant. But if the NSA can positively identify them it is probable that no one is truly anonymous unless you simply don't ever post email, forum posts, or anything else online. I keep a low profile but it sounds like only cave dwellers and hermits can escape big brother!

    --
    Be More, Be Manly, The Manly Geek Ubergeek Extraordinaire Blogger: www.manlygeek.com/blog Podcaster: podcast.man
    1. Re:Officially Freaked Out by Oswald+McWeany · · Score: 4, Interesting

      Develop a shifting writing style and you'll be ok.

      I wonder if you could do something like deliberately write in simple sentences; run everything through Google Translate to another language and then run that translation back to English.

      That should anonymise you a little.

      --
      "That's the way to do it" - Punch
    2. Re:Officially Freaked Out by Baloroth · · Score: 5, Insightful

      Or since you're the only person whose writing in barely or totally incomprehensible gibberish, make you super easy to identify. That's a problem with most anonymization methods: unless everyone else is using those same methods, you actually make yourself stand out.

      Relevant XKCD

      --
      "None can love freedom heartily, but good men; the rest love not freedom, but license." --John Milton
    3. Re:Officially Freaked Out by infolation · · Score: 4, Informative

      Sadia Afroz is the main public-sector researcher on this topic (stylometric machine learning).

      She gave a relevant introduction in 2013 stylometric analysis to track anonymous users in the underground and the corresponding video regarding darknet user tracking through stylometry.

      She commented a while ago "Please do not ask me to deanonymize Satoshi." and gave reasons.

  2. Sources for the article by Anonymous Coward · · Score: 4, Insightful

    According to the author - ME.

    Sounds truthy enough.

  3. Grammarly by Anonymous Coward · · Score: 5, Funny

    It's beneficial that I exercise Grammarly. Straight away those concerned with distinguishing me, will undergo unhingement.

  4. According to my source at the DHS by linuxguy · · Score: 5, Insightful

    An anonymous reader shares a report... "according to my source at the DHS..."

    Well, I am not anonymous and my source at DHS says that these claims are BS. Who is more credible?

    In 2014 Newsweek was pretty damn sure they had the right Satoshi and dragged a poor soul through hell and back because of their "beliefs". Can we give this topic a rest, until we know for sure and for real? None of this anonymous reporter citing anonymous sources at DHS crap.

    1. Re:According to my source at the DHS by squiggleslash · · Score: 4, Interesting

      Seems improbable to me too for the simple reason that the most likely Nakamoto is actually a group of people, which would explain a number of well documented oddities such as frequent switching between British and American spelling, and other unusual aspects of Nakamoto's life. That makes me doubt the entire NSA thing.

      Part of me really wants to believe that one member of the group was really Craig Wright, partially because it'd upset a sizable amount of the Bitcoin community, and partially because he does fit the profile of what I'd suggest was the leadership of the group. I'm not going to make that bet though.

      (Of course the perfect answer would be if it were Wright, Finney, and... Dorian Nakamoto. That'd be glorious.)

      --
      You are not alone. This is not normal. None of this is normal.
  5. So He Could Sue... by Luthair · · Score: 4, Insightful

    the NSA, I recall lawsuits after the Snowden releases were kicked out of court because they couldn't show they had standing. Apparently Satoshi Nakamoto can show he has standing because the NSA has copies of his emails.

  6. Re:Great! by XXongo · · Score: 5, Funny

    So who was Shakespeare?

    Say, we could find that out, couldn't we!

    All we have to do is digitize the bulk emails and texts collected from the NSA's mass surveillance of everybody in 16th century England, and compare them to Shakespere's works! Easy.

  7. you will hate me but it'll be in your head all day by OutOnARock · · Score: 4, Funny

    ...will the real Satoshi please stand up
    please stand up
    please stand up

    ....ducks!......

  8. The right to be private.. by sqorbit · · Score: 5, Insightful

    Doesn't this person deserve the right not to have their identity known? They have not (as far I as I know) committed a crime or being investigated for a criminal act. I'm sure the motivation behind remaining anonymous is for his own safety and well being. If someone has not released their identity on purpose, and even more so gone to lengths to keep it private why is anyone trying to find out who he is. Sure there's an interest level there. There's quite possibly a lot to learn, but at what cost? I know most of these points are completely obvious and the answers are also unfortunately obvious, but it needs to be said anyway.

    --
    Sent from my TARDIS
  9. Re: Nice Warrent by Anonymous Coward · · Score: 5, Insightful

    *Do you enjoy terrorism?*

    This IS terrorism.

  10. Re:Nice Warrent by XXongo · · Score: 4, Insightful

    Now, lets hear from the liberals telling me I need to pay more taxes for crap like this. After all, I do like to use roads, police, and NSA spying on everything everyone writes ever.

    I'm not sure what the word "liberals" is doing here. In general, the liberals have been rather vocal in their dislike and distrust of the NSA, CIA, and other TLAs. The support for these has been mostly been voices on the right saying "we need more tools to keep America secure!"

    As for the "more taxes" quip, in general government spending goes up under Republican administrations, and is constant or even down under Democratic administrations. (It was the Bush administration, remember, that coined the phrase "deficits don't matter.")

  11. Why? by tomthepom · · Score: 5, Insightful

    Is Satoshi Nakamoto suspected of a crime? Is he or she a threat to national security?
    The NSA has expended all this effort and violated Satoshi's and a billion other people's privacy for.... what? Shits and giggles?

  12. This is ok by Headw1nd · · Score: 4, Interesting

    I'm sure there will be loads of posts here denouncing the NSA for this, because it is in fact creepy and invasive. However, this kind of thing is *exactly* what they should be doing. "Satoshi Nakamoto" is a figure who created a economy-changing product, and as a result holds assets that value in the billions. Their motivations, ideology, and state ties were unknown, though they maintained they were not an American. It's completely reasonable for government to find out who this person is, and determine if they were and ally, an enemy, or neither. Now that they know they can act accordingly.

  13. Re:Why? by PPH · · Score: 5, Insightful

    violated Satoshi's and a billion other people's privacy

    They violated Satoshi's privacy just for the practice. They violated a billion other's privacy to build a baseline corpus to tune their search application.

    --
    Have gnu, will travel.
  14. Officially Pissed Off by TiggertheMad · · Score: 4, Interesting

    If this is true, it begs the question: why is the NSA looking for Satoshi? Where are the warrants to do this kind of search? This is a fairly involved process, even if the software was already written, collecting the entirety of Satoshi's writing for input is time consuming work.

    As a taxpayer, there be something pretty fuckin important they need to ask Satoshi personally to justify this waste of my tax money.

    --

    HA! I just wasted some of your bandwidth with a frivolous sig!
    1. Re:Officially Pissed Off by courteaudotbiz · · Score: 4, Insightful

      As a taxpayer, there be something pretty fuckin important they need to ask Satoshi personally to justify this waste of my tax money.

      You really think they have to justify what they do with your money? One of my fav quotes in that good old ID4 movie: " You don't actually think they spend $20,000 on a hammer, $30,000 on a toilet seat, do you?"

    2. Re:Officially Pissed Off by larryjoe · · Score: 4, Insightful

      If this is true, it begs the question: why is the NSA looking for Satoshi? Where are the warrants to do this kind of search? This is a fairly involved process, even if the software was already written, collecting the entirety of Satoshi's writing for input is time consuming work.

      As a taxpayer, there be something pretty fuckin important they need to ask Satoshi personally to justify this waste of my tax money.

      Maybe finding Satoshi is as important as landing a man on the moon. The task at hand may not be that important, but developing the technology in the process yields capabilities that may prove to be significant for future tasks.

    3. Re:Officially Pissed Off by laddiebuck · · Score: 4, Informative

      I know it's out of fashion to read TFA, but you could have just scrolled right to the end:

      "But why? Why go to so much trouble to identify Satoshi? My source tells me that the Obama administration was concerned that Satoshi was an agent of Russia or China—that Bitcoin might be weaponized against us in the future. Knowing the source would help the administration understand their motives. As far as I can tell Satoshi hasn’t violated any laws and I have no idea if the NSA determined he was an agent of Russia or China or just a Japanese crypto hacker."

      Oh and also, this report is literally just a self-sourced blog post.

      "Sources: Many readers have asked that I provide third party citations to ‘prove’ the NSA identified Satoshi using stylometry. Unfortunately, I cannot as I haven’t read this anywhere else—hence the reason I wrote this post. I’m not trying to convince the reader of anything, instead my goal is to share the information I received and make the reader aware of the possibility that the NSA can easily determine the authorship of any email through the use of their various sources, methods, and resources."

  15. ac by trb · · Score: 5, Funny

    I wonder how long it will take the NSA to unmask Slashdot's Anonymous Coward.

  16. Re:Why? by Bruce+Perens · · Score: 4, Interesting

    Is Satoshi Nakamoto suspected of a crime? Is he or she a threat to national security?

    One of the theories regarding Bitcoin is that it is an effort by a national actor to crash other nation's economies.