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Snowden's Dead Man's Switch

161 点作者 qubitsam将近 12 年前

19 条评论

tokenadult将近 12 年前
Schneier&#x27;s last paragraph sums it up for me:<p>&quot;I&#x27;m not sure he&#x27;s thought this through, though. I would be more worried that someone would kill me in order to get the documents released than I would be that someone would kill me to prevent the documents from being released. Any real-world situation involves multiple adversaries, and it&#x27;s important to keep all of them in mind when designing a security system.&quot;<p>Schneier&#x27;s topic sentence for that paragraph could serve as my one-sentence evaluation of Snowden&#x27;s deeds so far--he hasn&#x27;t thought things through sufficiently. A longer commentary on Snowden<p><a href="http://www.theaustralian.com.au/news/features/some-secrets-best-remain/story-e6frg6z6-1226680991786" rel="nofollow">http:&#x2F;&#x2F;www.theaustralian.com.au&#x2F;news&#x2F;features&#x2F;some-secrets-b...</a><p>is an Australian&#x27;s words voicing some of my misgivings about Snowden&#x27;s plan for revealing secrets and his aims and his methods.<p>I wish Snowden a long and healthy life (but I would like him back here in the United States to stand trial). I hope that the most sensitive secrets that he is in a position to disclose stay undisclosed, but I wouldn&#x27;t bet that that will happen, whether Snowden is alive or dead. There are &quot;multiple adversaries,&quot; for sure, and it&#x27;s not clear that they all have the same incentives in this situation.
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flyosity将近 12 年前
From the Wired article:<p>&quot;But Snowden’s case is actually a kind of reverse dead man’s switch, says John Prados, senior research fellow for the National Security Archive and author of several books on secret wars of the CIA. [...] “In the dead man switch, my positive control is necessary in order to prevent the eventuality [of an explosion],” Prados said. “In Snowden’s information strategy, he distributed sets of the information in such a fashion that if he is taken, then other people will move to release information. In other words, his positive control of the system is not required to make the eventuality happen. In fact, it’s his negative control that applies.&quot;<p>I&#x27;m really surprised it was implemented like that, I think using an actual, digital &quot;dead man&#x27;s switch&quot; would have made more sense. Why not have 100 servers around the world running jobs to email out documents to 100 journalists at all times if an env variable isn&#x27;t reset every few weeks? Then if he disappears or is killed, a few weeks later the jobs complete and email out the information?
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TillE将近 12 年前
&gt; I would be more worried that someone would kill me in order to get the documents released<p>The unstated assumption is that these documents would be particularly interesting to foreign governments. That&#x27;s probably wrong.<p>What we&#x27;ve seen so far is merely evidence of actions that were long assumed to be taking place anyway. Other governments likely have their own evidence already.<p>These documents are important to the public, but they&#x27;re of minimal value to an enemy. His intent was never malicious, so it&#x27;s extremely unlikely that he&#x27;s carrying the names of agents or other sensitive information of that sort.
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ShabbyDoo将近 12 年前
Imagine if Snowden had deployed a bunch of redundant crawlers of various news sites likely to cover him and quote him directly when he speaks. Their activity would be nearly undetectable in the traffic of the NYTimes, CNN, etc. He could come up with a bunch of seemingly innocent control phrases which he would use in soundbite quotes during press conferences, etc. He would say a phrase, the media would quote him, and the crawlers would identify this &quot;control transmission&quot; from Snowden and take action. Some phrases would be dead man&#x27;s switches in that one of them would have to be observed every couple of weeks or documents would be released via mechanisms difficult to trace back to the server (Tor?). Other phrases would trigger incremental leaks to allow proof that he is still powerful and in control. &quot;Tomorrow, I&#x27;m going to release a _mightily spectacular revelation_!&quot;<p>Maybe there should be two levels of dead man&#x27;s switching -- incremental leaks if a phrase isn&#x27;t reported in, say, two weeks and a major release if no phrase reported in three months. This way, he figuratively would have multiple units of currency with which to bargain. Let&#x27;s say he was thrown in jail. If he only could threaten to release a single, big bundle of secrets via a dead man&#x27;s switch, all his bargaining power would disappear should a government call his bluff and keep in jail until after the switch fired. However, if he could threaten incremental releases and show that, when given full freedom, the releases stop, he would have power for quite some time.<p>How would one acquire the use of, say, 50 servers in various datacenters owned by various providers without leaving traces or implicit fingerprints (multi-year prepayment being the big one I am thinking of)?
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skriticos2将近 12 年前
Schneier has an excellent point there. Right now Snowden is in the eyes and minds of a lot of somewhat concerned and maybe even angry people. If he&#x27;d encounter and unexpected sudden end to his life, he&#x27;d become the modern equivalent to a martyr. From the standpoint of his adversaries this would probably be much less than desirable as it would turn up the heat even more than it is already, documents or no documents. In fact, he&#x27;d probably have much less facetime on the news if they&#x27;d just let him be in the first place. Almost makes me wonder what else is going on that&#x27;s not in the news so much right now?
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sillysaurus将近 12 年前
Why would the US want to kill Snowden?<p>I think this dead man&#x27;s switch is deterrent against being taken into custody. If the US tries to incarcerate him, then the switch will trip and more secret documents will be leaked. Though maybe the US doesn&#x27;t care.<p>I wonder how badly the US wants him at this point?
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marcamillion将近 12 年前
I fully agree with the 1st comment on the post itself:<p><i>vladimir • July 18, 2013 8:57 AM If he has a switch like this. That is not only protect him from being killed by US authorities but motivate the same authorities to protect him from all other threats.</i><p>This should provide enough incentive for the same spy agencies to make sure nothing happens to him.
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zwtaylor将近 12 年前
I&#x27;m very curious as to how this works at a basic level. Perhaps a &#x27;positive-control&#x27; system in which he has to send a signal to some clandestine web service every 24 hours to prevent the keys from being released? Does he have an Arduino board strapped to his chest detecting his pulse? Or has he simply entrusted some mechanism to somebody else, who can determine whether the keys should be released depending on the nuances of the situation in which he is harmed&#x2F;killed?
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trotsky将近 12 年前
This play is straight out of the wikileaks playbook that they used almost verbatim when the us was making a lot of noise about assange. It appeared to be effective, in that US intelligence took the threat seriously and were concerned about the ramifications of what might be included. One element of that was the belief that those docs included some kind of &quot;kill shot&quot; class leak that would pretty much sink Bank of America.<p>There were certainly elements of truth to all of these things - there was a document cache, it was encrypted, people did have split keys, it probably did include elements of what was revealed as the robosigning scandal.<p>But from hearing discussion about it the subject, I think that US Intelligence now more or less holds the opinion that it was a bluff. Nothing of significant harm was included in the unreleased documents, though I think that&#x27;s informed speculation and not some kind of confirmed fact.<p>All of a sudden after Snowden was getting helped by wikileaks and he was under a lot of pressure, the revelation of a similar encrypted cache of documents distributed widely was given to a lot of news agencies, and has regularly come up at opportune times in friendly media outlets.<p>I haven&#x27;t been told this by anyone, but I&#x27;m pretty sure the intelligence community isn&#x27;t buying it. Reports by greenwald were somewhat inconsistent with idea that there is a large cache of even more damning documents left. He&#x27;s been travelling internationally, was staying in hong kong where many services operate openly, and presumably under pressure from a variety of security services and states as he tries to escape moscow and secure a safe place to live. It is hard to keep secret keys and documents secure under the best of conditions, and those are about the worst conditions possible.<p>The only reasonable thing to assume here is that it&#x27;s all burned - everything snowden walked away with is or will be in the hands of foreign states and anything particularly damning will likely end up in the press sooner or later.<p>So if you believe that, that there is no way to unring this bell, the last thing you&#x27;re going to do is spend any time being concerned about a dead man&#x27;s crypto cache.<p>If you&#x27;re willing to do enough horse trading to close the entire european airspace to a single individual, you&#x27;re pissed and you&#x27;re gonna do whatever it is you want to do. That&#x27;s not going to include killing him, simply because the cost is high and the benefit is low. But they are clearly going to exert an inhuman amount of resources into making him regret being born.<p>And that&#x27;s absolutely unrelated to Mr. Snowden. That&#x27;s all for the effect it will have on anyone having similar thoughts. I think he&#x27;s awesome and did Americans and the world a great favor, and that&#x27;s he&#x27;s really brave. And yet after seeing this go down if I was ever in a position to consider doing something like this there is no fucking way I&#x27;d ever think I could handle this kind of heat. Not a chance, no question.<p>Problem solved.
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marshray将近 12 年前
My guess is that Snowden has quite an elaborate contingency system in place and has not actually revealed how it all works. Schneier seems to be speculating based on a Wired article, based on nontechnical explanations by Greenwald, based on (probably limited) information provided by Snowden.<p>Snowden noted Russia and China have an &quot;open door&quot; policy. Although they might like the raw data, I don&#x27;t think that either would want to Snowden expire under their protection. That would make them look quite unappealing to anyone considering being a &quot;walk in&quot; informant in the future.<p>So for the time being, Snowden is the proverbial goose that laid the golden eggs and for everyone involved is worth much more alive. But once he&#x27;s in a small South American country, things might change.
digz将近 12 年前
This also assumes that this is information that Snowden wouldn&#x27;t release anyway and that someone cares about. True or not, the perception by those who believe that he jeopardized national security is almost certainly that he&#x27;s likely to leak whatever he can.<p>If he really things this is what&#x27;s going to keep him safe, he&#x27;s over playing his hand.<p>Furthermore, I think he&#x27;s deluding himself if he thinks he&#x27;s actually going to be targeted for assassination by the US. I&#x27;m no Obama fan, but it&#x27;s a little far fetched. Shoved in jail, maybe. Killed to silence him? Nah.. that&#x27;s a strategy ironically more likely to be employed by the countries he&#x27;s seeking asylum status from.
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bigiain将近 12 年前
From the comments (yeah, I know, WTF and I doing reading comments on the internet???):<p>Also, considering the fact that the NSA appears to broadcast such critical data to just about anyone with a clearance, it can be assured that they don&#x27;t care at all about foreign governments learning about them. They are primarily concerned about their real enemy, US citizens, and tangentially concerned about the non-US public (Manning&#x27;s revelation that the US would no longer be able to support its oppressive allies lead to the Arab spring).
davidrudder将近 12 年前
&quot;I&#x27;m not sure he&#x27;s thought this through, though. I would be more worried that someone would kill me in order to get the documents released than I would be that someone would kill me to prevent the documents from being released. &quot;<p>Not that Schneier&#x27;s <i>advocating</i> anything....
chiph将近 12 年前
This may not be automated -- he may have simply given copies&#x2F;keys &amp; instructions to several trusted friends, who will watch the news for info about his death.<p>They would then make the decision to release or not release, either independently or in concert, depending on how he set it up.
nathantotten将近 12 年前
Maybe his &#x27;dead man&#x27;s switch&#x27; is just his lawyers. Doesn&#x27;t solve the problems, but it sounds a lot more likely than some of the ideas being discussed here.
dustingetz将近 12 年前
<i>&quot;The thought of paying someone I was forced to fire because he (or she) is incompetent burns me up inside.&quot;</i><p>It was your decision to hire him, and it was your mistake that you are remedying by firing him. Incompetence is subjective. If your interview process makes it clear that your employees must live in constant fear of termination if they aren&#x27;t ramping up fast enough <i>for you</i>, on <i>your product</i> with <i>your technical debt</i> and <i>your team&#x27;s shitty architecture choices</i> (&quot;fire fast&quot; and &quot;with little notice&quot;, you wrote), you&#x27;ll find that your candidate pool vanishes.
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kepano将近 12 年前
Snowden is risking his life no matter what he does.
mikevm将近 12 年前
This goofy comment made me lol:<p>&gt; I want a dead man&#x27;s switch that deletes all my porn.
mrcharles将近 12 年前
Man, that link really has a misleading URL.