March 2012 - cypherpunks-legacy

Re: [cryptography] [info] The NSA Is Building the Country’s Biggest Spy Center (Watch What You Say)
by Eugen Leitl 22 Mar '12

22 Mar '12

----- Forwarded message from ianG <iang(a)iang.org> -----

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StockAlert- VIP c8pi1
by Rich L. Bell 21 Mar '12

21 Mar '12

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by Somer Kenyetta 21 Mar '12

21 Mar '12

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(no subject)
by �� q 21 Mar '12

21 Mar '12

○──────────────────────────○ ●費用　：　男性　完全無料 ●資格　：　１８歳以上の男性 ●報酬　：　３万円以上 ●内容　：　デートから肉体関係 ●募集人数　：　各県５０名　 ○──────────────────────────○ http://sukimono.info/2efm02/ 女性と男性のバランスを保つ為、限定５０名の応募となっております。 (ページが表示される内は参加可能) また当サークルには本当に出会いを求めている方のみが参加しています。冷かしでの参加は迷惑ですので絶対におやめ下さい。 http://sukimono.info/2efm02/ このメルマガは懸賞サイト会員様に配信されています。解　除　はこちら sup_ado_123(a)yahoo.co.jp

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by LUZ 21 Mar '12

21 Mar '12

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2-GHz clock quantum key distribution over 260 km of standard telecom fiber
by Eugen Leitl 21 Mar '12

21 Mar '12

http://arxiv.org/abs/1203.4323 2-GHz clock quantum key distribution over 260 km of standard telecom fiber Shuang Wang, Wei Chen, Jun-Fu Guo, Zhen-Qiang Yin, Hong-Wei Li, Zheng Zhou, Guang-Can Guo, Zheng-Fu Han (Submitted on 20 Mar 2012) We report a demonstration of quantum key distribution (QKD) over a standard telecom fiber exceeding 50 dB in loss and 250 km in length. The differential phase shift QKD protocol was chosen and implemented with 2 GHz system clock rate. By careful optimization of the 1-bit delayed Faraday-Michelson interferometer and the use of the super-conducting single photon detector (SSPD), we achieved a quantum bit error rate below 2% when the fiber length was no more than 205 km, and of 3.45% for the 260 km length fiber with 52.9 dB loss. We also improved the quantum efficiency of SSPD to obtain high key rate for 50 km length. Subjects: Quantum Physics (quant-ph) Journal reference: Optics Letters, 37, 1008-1010 (2012) DOI: 10.1364/OL.37.001008 Cite as: arXiv:1203.4323v1 [quant-ph]

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Re: [tahoe-dev] keeping private grids privatey
by Eugen Leitl 21 Mar '12

21 Mar '12

----- Forwarded message from sickness <sickness(a)tiscali.it> -----

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Autonomous, Roaming Swarm Creates Temporary Local Wi-Fi Network
by Eugen Leitl 21 Mar '12

21 Mar '12

http://www.suasnews.com/2012/03/13658/autonomous-roaming-swarm-creates-temp… Autonomous, Roaming Swarm Creates Temporary Local Wi-Fi Network 20 March 2012 By Gary Mortimer The Electronic Countermeasures project is essentially an autonomous, roaming Internet swarm, constructed from repurposed UAS. The project is lead by Liam Young of think tank Tomorrowbs Thoughts Today and Unknown Fields Division, with assistance from Eleanor Saitta, Oliviu Lugojan-Ghenciu, and Superflux and was demonstraeted at the Glow Festival in the Netherlands last year. Electronic Countermeasures @ GLOW Festival NL 2011 from liam young on Vimeo. These UAS would fly off and hover above the city, and create ad hoc connections and networks in a new form of nomadic territorial infrastructure,b Young says, b a flock of interactive autonomous drones that form their own place specific, temporary, local, Wi-Fi communityba pirate Internet.b Rather than carry satellites to uplink to the greater Internet, Young imagines his swarm as a highly site-specific means to create peer-to-peer communication (think text messaging or the old Napster file sharing model). And in this regard, Young actually views Electronic Countermeasures as a form of nomadic architectureba roaming infrastructure built from digital beams rather than steelblike a drifting island of information. b Architecture is typically such a slow medium and we wanted to develop alternative strategies for how an architect may operate and alternative forms of projects that could play out with much more immediacy,b he writes.

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by DOOR - DOOR 21 Mar '12

21 Mar '12

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Bitcoin Seeks New Life In Africa
by Eugen Leitl 21 Mar '12

21 Mar '12

(Rudiger is a good friend of mine, I hope he can make it to the 5th May event in Munich) http://www.technologyreview.com/business/39829/?p1=BI Wednesday, March 21, 2012 Bitcoin Seeks New Life In Africa A digital currency without a central bank could be ideal for economies where the mobile phone is king but the banking systems are weak. By Tom Simonite Recent months have not been kind to proponents of Bitcoin, the virtual peer-to-peer currency that soared to a value of over $30 last summer on a surge of public interest and media reports. The currency operates over the Internet with no central control. But now its 15 minutes of fame appear to be over. Reports of a $500,000 digital heist last year were followed by wild volatility in the value of a bitcoin, which has now dropped to around $5. Last month, the largest exchange where bitcoins could be traded for dollars unexpectedly closed because of what it called "increasing regulation." Now some in the Bitcoin community, a blend of people motivated by libertarian politics and commitment to open-source software, are beginning to wonder if their pet currency may have brighter prospects in the developing economies of Africa. German software developer R|diger Koch, a consultant to the U.K.-based bitcoin exchange Intersango, recently traveled to speak at the Mobile Money Africa event in Lagos, Nigeria. There, Koch told the audience of businesspeople and government officials that Bitcoin could support a system of robust, low-fee mobile payments for anyone whose cell phone has a camera. "Many of them were interested in how Bitcoin could be useful," says Koch. His talk in Nigeria was intended to launch a dialogue that could lead Intersango or others to launch practical Bitcoin-based mobile payment systems for Africa. Koch has also visited several African embassies in Berlin to introduce government officials to the currency. The system needed to create and exchange bitcoins made its mysterious appearance on the Internet in 2009 (it remains unclear who wrote the software). The coins are impossible to fake and can be created and used without any central authority, such as a central bank. The work of generating bitcoins and verifying transactions is shared among the users of the software, all protected by sophisticated mathematics. In the United States and Europe, Bitcoin's meteoric rise was mostly driven by speculators; hardly anyone used the currency to actually pay for goods and services. Koch thinks things could be different in Africa, where a universal, electronic currency could solve real problems. Fast-growing African economies such as those of Kenya and Nigeria rely heavily on cash transactions, particularly in rural areas where there are no ATMs and few people have bank accounts. In some places, large networks of illegal money changers are used for cross-border payments. That situation is part of the reason for the early success in Africa of mobile-phone payment systems such as Kenya's M-Pesa, which allows users to send each other money using text messages. Koch believes that mobile payments built around Bitcoin could be even more useful. "It's interesting to see how creative Africans can be about transferring money," says Koch. "They really think seriously about a cashless society." Open-source technology created by the Bitcoin community could be used to create simple mobile apps for payments accessible to almost any phone with a camera, says Koch. Use of smart phones is now growing rapidly in some African countries, particularly Kenya, as prices for models using Google's Android software have dropped rapidly. He imagines a design similar to the Bitcoin for Android app, which allows one person to transfer bitcoins to another by using a phone to snap a photo of a 2-D bar code or QR code on the screen of another phone. "People could exchange money when they meet on the street," says Koch. The decentralized design of Bitcoin means a payment system that uses the currency would easily span national borders and could avoid system-wide outages like those suffered by M-Pesa in December, which left users unable to do business. "All centralized systems have the same problem," says Koch. "If you rely on it and you don't have a way to pay, then you are in trouble." Tonny Omwansa, an academic at the University Of Nairobi, Kenya, studies payment systems and recently published a book on M-Pesa. "The low financial inclusion, low penetration of formal financial services, and uptake and penetration of mobile phones make mobile payments very valuable," he says. However, he notes, users currently run the risk of "dependence on a supplier which is monopolistic." Mobile payments built on top of Bitcoin's decentralized design could avoid that risk. But Omwansa says that although he is familiar with Bitcoin, most in Africa are not. "Hardly anyone I know has heard about it," he says. Copyright Technology Review 2012.

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