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[mnet-devel] Anonymity and Performance in Peer-to-Peer Systems
by Some Guy 06 Jul '18

06 Jul '18

This post is supposed to get to Nikita Borisov and Jason Waddle regarding: http://www.cs.berkeley.edu/~nikitab/projects/p2p/proposal.html Part 1: "Research a formal metric for the anonymity of a system. We are currently performing a literature search; if we fail to find a suitable metric in past research, we will propose a new one." Here's a nice paper that analizes the annonymity of Crowds: Probabilistic Analysis of Anonymity Vitaly Shmatikov SRI International http://citeseer.nj.nec.com/shmatikov02probabilistic.html "We use discrete-time Markov chains to formally model the behavior of group members in Crowds [22], specify anonymity properties of the system as temporal logic formulas, and use a probabilistic model checker to verify them. This analysis method is applicable to other probabilistic systems such as Freenet." Part 2: DOS Resistance: I've got a basic handle now on DOS resistance vs. peformance and I can almost get a faint glimmer of what the a "perfect" DHT should look like. I've posted my ideas on it to the Freenet list and I'll post them to the MNet list today too. If anyone wants to discuss how to build a better Freenet, I'd LOVE to help. __________________________________________________________________ Gesendet von Yahoo! Mail - http://mail.yahoo.de Logos und Klingeltvne f|rs Handy bei http://sms.yahoo.de ------------------------------------------------------- This SF.net email sponsored by: Enterprise Linux Forum Conference & Expo The Event For Linux Datacenter Solutions & Strategies in The Enterprise Linux in the Boardroom; in the Front Office; & in the Server Room http://www.enterpriselinuxforum.com _______________________________________________ mnet-devel mailing list mnet-devel(a)lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mnet-devel ----- End forwarded message ----- -- Eugen* Leitl <a href="http://leitl.org">leitl</a> ______________________________________________________________ ICBM: 48.07078, 11.61144 http://www.leitl.org 8B29F6BE: 099D 78BA 2FD3 B014 B08A 7779 75B0 2443 8B29 F6BE [demime 0.97c removed an attachment of type application/pgp-signature]

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[wta-talk] Participatory Panopticon
by Guiseppe Getto 06 Jul '18

06 Jul '18

<wta-talk(a)transhumanism.org> http://www.futurismic.com/2006/12/new_column_jamais_cascio_on_th_1.html Permanent Link: http://cyborgiterationtendency.blogspot.com/ Watching The Watchmen Watching Us by Jamais Cascio This November, comedian Michael Richards learned about the participatory panopticon. So did the UCLA police. And early in the month, Virginia Senator George Allen learned that it can have a political bite. The participatory panopticon is the emerging scenario of distributed observation of the world around us, using cheap, networked tools like mobile phones and open, web-based tools like YouTube. A rapidly-growing number of us have literally at our fingertips systems of capturing and sharing what we see. Most of what we capture will be of interest only to ourselves, or to close friends and relatives; some, however, will have a far greater reach that we might suspect. What all three of the examples I cite at the beginning of this piece have in common is that they were recordings of events that (a) the perpetrators would, in retrospect, probably wish to have done differently, if at all, and (b) would have received little notice in the era before personal networked cameras and video-sharing websites. Certainly there may have been rumors that a comedian had "gone nuts" on stage, or that UCLA cops had beaten a student, but as rumors, they'd have a limited life-span, and would soon be forgotten. Because of the participatory panopticon, however, these events will for a very long time shape how many of us think about these people. The participatory panopticon is not going to go away any time soon. The publicity associated with the Richards and UCLA cases -- and the political impact of the George Allen "macaca" incident -- virtually guarantees that more citizens will have cameraphones at the ready to capture and share damning evidence of the misbehavior of officials and celebrities. So what will the participatory panopticon explosion look like? Mass Participation: The next time we see a cameraphone-recorded, newsworthy event, chances are we'll have multiple perspectives on it, each video providing additional context and evidence. On balance, this will be useful, as a typical response by those caught on video is that the recording misses what happened before, or after; the more witnesses, the greater the accuracy. Moreover, having multiple recordings helps to mitigate the effect of... Fakes: The combination of the impact of these recordings, the low quality of the actual video, and the rise of easy-to-use digital image and video tools means we are almost certain to see faked cameraphone recordings of seemingly volatile incidents, whether involving celebrities or civic officials. A video uploaded to YouTube can be highly disruptive to the "story" a movie star or presidential candidate wants told, even if the video is later shown to be a hoax. The initial scandal usually carries more memetic weight than the subsequent correction. Especially given what happened to George Allen, expect to see one or more faked videos used to attack candidates in the run-up to the 2008 election in the US. That's why we'll see more... Self-recording for self-defense: A key lesson from the 2004 presidential campaign in the US was that it's vitally important for protestors to make their own (multiple) video recordings of protests and arrests. The NY police videotaped protestors, but apparently edited the recordings later on to justify the arrests -- edits that were exposed by comparisons to the protestor videos. If the UCLA cops that beat the kid in the library last month had been wearing their own personal cameras, they'd be able to demonstrate that the kid was, as they claimed, behaving in a way that warranted the beating prior to the point where the citizen cameraphone recording started. Self-recording for self-defense won't be much help if the individual does, in fact, mess up -- it wouldn't have helped Michael Richards or George Allen, for example. In the case of public officials, however, that's a good thing. If a police officer or elected leader knows that every contact he or she has with the public is being recorded, they will presumably be less inclined to behave in careless or corrupt ways. This deterrent effect would be even greater if the recordings were made available to the public soon after they're made (with appropriate blurring or muting to protect the privacy rights of the citizens involved). For police officials, the use of personal cameras to record citizen interactions would be a small step from the current use of dashboard-mounted cameras in many police vehicles, used to record traffic stops and the like. As the proliferation of "true life video" programs on television shows, these recordings can be very useful as evidence if someone attacks an officer; clearly, a badge-mounted camera would offer even greater evidentiary value. The proliferation of cameras this scenario suggests is undoubtedly troubling for many civil libertarians and privacy advocates. The problem is, these cameras have already proliferated -- the majority of mobile phones sold around the world have a camera, and more cameraphones were sold in 2005 than any other kind of camera, digital or film. We will have more examples of the participatory panopticon in action in the coming weeks and months. Similarly, surveillance cameras have become a commonplace part of urban policing, whether mounted on buildings, street lights, or police car dashboards. What we need are rules and practices that make the use of these tools more responsible and transparent. David Brin refers to this as "reciprocal accountability," a phrase I particularly like because it recognizes that we have laws and public officials for very good reasons, but that they need to be accountable to the public in substantive ways. The participatory panopticon is the emergence of an uncoordinated, haphazard form of reciprocal accountability, relying more on scandal than on process. We will need to pay more attention to how these practices are formalized for one very important reason: The participatory panopticon watches us all; This isn't simply a concern for police officers, politicians and comedians. Everyday citizens who behave in ways that draw notice -- for good and for ill -- will increasingly find themselves captured on cameraphones and featured on video sharing websites. We're already seeing example of this, from the "dog poop girl" in South Korea to student recordings of abusive teachers around the world. As more people see the value of making these recordings, and as the tools for making and sharing the videos become even easier, we will see this become a commonplace part of news stories and public discourse. The participatory panopticon isn't a scenario of the future; the participatory panopticon is here. Comments There are 0 comments and trackbacks on this entry. Add yours now. _________________________________________________________________ Stay up-to-date with your friends through the Windows Live Spaces friends list. http://clk.atdmt.com/MSN/go/msnnkwsp0070000001msn/direct/01/?href=http://sp… es.live.com/spacesapi.aspx?wx_action=create&wx_url=/friends.aspx&mk _______________________________________________ wta-talk mailing list wta-talk(a)transhumanism.org http://www.transhumanism.org/mailman/listinfo/wta-talk ----- End forwarded message ----- -- Eugen* Leitl <a href="http://leitl.org">leitl</a> http://leitl.org ______________________________________________________________ ICBM: 48.07100, 11.36820 http://www.ativel.com 8B29F6BE: 099D 78BA 2FD3 B014 B08A 7779 75B0 2443 8B29 F6BE [demime 1.01d removed an attachment of type application/pgp-signature which had a name of signature.asc]

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Re: [liberationtech] Google Hangout the new, better skype? Was Re: Skype redux
by Seth David Schoen 06 Jul '18

06 Jul '18

Christopher Soghoian writes: > I have asked Google's policy team, repeatedly, about what capabilities they > have for intercepting Hangout conversations, and I always get the same > vague no comment. > > Although Google is a clear transparency leader when it comes to reporting > aggregate stats on the # of requests that they receive, they still suck > when it comes to actually discussing their technical surveillance > capabilities, as well as the legal standards they follow when providing > surveillance assistance. I sympathize with your frustration about Google and other companies' unwillingness to talk about their interception capabilities. In the particular case of Hangouts, it seems clear that the Hangout data is encrypted only between the user and Google, and not end-to-end. If so, intercepting Hangouts is even easier for Google than intercepting Skype calls is for Microsoft, since they don't even have to tamper with the key exchange process. They can just program their servers to passively record cleartext data already in their possession. It's disconcerting to see what a low priority secure end-to-end encryption continues to be for most designers of communications systems. (There might be technical reasons, too -- like wanting to transcode video, translate it, add captions, etc., but if people won't talk about the subject at all, we might never know the exact balance of factors that led to their decisions.) Two challenges for end-to-end encryption which have been discussed on this list are that many people want to access particular communications systems from multiple devices, and they may expect to use some services with a web browser instead of by installing a native client. The former means they might expect to access a service from a device where their private key isn't available (and, if they manage to copy the private key onto many devices, the risk of key compromise goes way up); the latter means that they're at risk of receiving a fresh backdoored version every time they connect. But we may be able to solve both of these things to some extent. A thornier challenge is that articulated demand for end-to-end crypto is very low, and arguably _falling_. So even though many of us have strongly criticized Skype's security model for years, they've felt no obvious embarrassment or need to change it, and others have felt no compunction about introducing new products with even lower levels of cryptographic protection, or even with explicit backdoors (like current work at ETSI on next-generation GSM voice encryption)! If Google _were_ willing to comment, they might say that very few users had voiced any objection to the Hangout security model, and that the product continues to be adopted on a huge scale, providing incremental security benefits relative to using a telephone. -- Seth Schoen <schoen(a)eff.org> Senior Staff Technologist https://www.eff.org/ Electronic Frontier Foundation https://www.eff.org/join 454 Shotwell Street, San Francisco, CA 94110 +1 415 436 9333 x107 -- Unsubscribe, change to digest, or change password at: https://mailman.stanford.edu/mailman/listinfo/liberationtech ----- End forwarded message ----- -- Eugen* Leitl <a href="http://leitl.org">leitl</a> http://leitl.org ______________________________________________________________ ICBM: 48.07100, 11.36820 http://www.ativel.com http://postbiota.org 8B29F6BE: 099D 78BA 2FD3 B014 B08A 7779 75B0 2443 8B29 F6BE

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06 Jul '18

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