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Dat Protocol


Dat is a new protocol for #P2P content exchange. Instead of addressing content via a hash value (like #Bittorrent or #IPFS), content is saved in a version controlled #repository that is accessed via its public key. That way the creator can still update the content without having to distribute a new hash. This makes #Dat especially useful for websites such as blogs and code repositories like git. It works over any transport protocol (from sneakernet to onion), and, since it uses asymmetric #crypto, offers a fair deal of security. It doesn't care what it transports, so you can use it for anything from code to movies. The client can pick which swarm they use, such as a public #DHT swarm or a white-listed set of trusted entities. Here's some file access capabilities described in the whitepaper:
  • Support large file hierachies (millions of files in a single repository).
  • Support efficient traversal of the hierarchy (listing files in arbitrary folders efficiently).
  • Store all changes to all files (metadata and/or content).
  • List all changes made to any single file.
  • View the state of all files relative to any point in time.
  • Subscribe live to all changes (any file).
  • Subscribe live to changes to files under a specific path.
  • Efficiently access any byte range of any version of any file.
  • Allow all of the above to happen remotely, only syncing the minimum metadata necessary to perform any action.
  • Allow efficient comparison of remote and local repository state to request missing pieces during synchronization.
  • Allow entire remote archive to be synchronized, or just some subset of files and/or versions.
Similar to Bittorrent you can choose to become a #peer for a #repository (or parts of it), so popular content becomes well-mirrored.

#privacy #g #tech #decentralized #security

 

Dat Protocol


Dat is a new protocol for #P2P content exchange. Instead of addressing content via a hash value (like #Bittorrent or #IPFS), content is saved in a version controlled #repository that is accessed via its public key. That way the creator can still update the content without having to distribute a new hash. This makes #Dat especially useful for websites such as blogs and code repositories like git. It works over any transport protocol (from sneakernet to onion), and, since it uses asymmetric #crypto, offers a fair deal of security. It doesn't care what it transports, so you can use it for anything from code to movies. The client can pick which swarm they use, such as a public #DHT swarm or a white-listed set of trusted entities. Here's some file access capabilities described in the whitepaper:
  • Support large file hierachies (millions of files in a single repository).
  • Support efficient traversal of the hierarchy (listing files in arbitrary folders efficiently).
  • Store all changes to all files (metadata and/or content).
  • List all changes made to any single file.
  • View the state of all files relative to any point in time.
  • Subscribe live to all changes (any file).
  • Subscribe live to changes to files under a specific path.
  • Efficiently access any byte range of any version of any file.
  • Allow all of the above to happen remotely, only syncing the minimum metadata necessary to perform any action.
  • Allow efficient comparison of remote and local repository state to request missing pieces during synchronization.
  • Allow entire remote archive to be synchronized, or just some subset of files and/or versions.
Similar to Bittorrent you can choose to become a #peer for a #repository (or parts of it), so popular content becomes well-mirrored.

#privacy #g #tech #decentralized #security

 



You broke the Internet



Now let's build a GNU one



Details: Yellow is for projects in development while green is for those that are available. Red illustrates brands that lose their monopoly condition once the respective layers are fully operational whereas light red indicates faulty technologies that we must replace.

Strongly recommend checking out the source website: http://youbroketheinternet.org/

Some related tags: #internet #surveillance #freesoftware #gnu #linux #security #netsec #crypto #ipfs #gpg #pgp #encryption #cryptocat #mumble #GNS #guix #nix #bittorrent #faceboogle #tor #I2P #otr #librecmc #libreboot #fsf #eff #ccc #pirateparty #pirates #ricochet #gnunet #freenet #android #replicant #grothoff #signal #libresignal #taler #gnutaler #youbroketheinternet #selfhosting #decentralization #selfhosted #tox #xmpp #jitsi #pond #PSYC #Tahoe-LAFS #retroshare #cjdns #onionshare #cryptocat #briar #maidsafe #coreboot #tribler #axolotl #zeroqm #bitmessage #cloud #skype #twitter #microsoft #rhizome #rina #netsukuku #tails #debian #freedombox #freedombone #ethos #qubes #whonix #guixSD #gentoo #zyre #reproduciblebuilds #openwrt #BMX7 #net2o #ethereum #copperheadOS #federation #dns #smtp #dane #blackadder #globaleaks #redphone #2020 #mesh #pulse #heartbeat

#youbroketheinternet

#youbroketheinternet

 



You broke the Internet



Now let's build a GNU one



Details: Yellow is for projects in development while green is for those that are available. Red illustrates brands that lose their monopoly condition once the respective layers are fully operational whereas light red indicates faulty technologies that we must replace.

Strongly recommend checking out the source website: http://youbroketheinternet.org/

Some related tags: #internet #surveillance #freesoftware #gnu #linux #security #netsec #crypto #ipfs #gpg #pgp #encryption #cryptocat #mumble #GNS #guix #nix #bittorrent #faceboogle #tor #I2P #otr #librecmc #libreboot #fsf #eff #ccc #pirateparty #pirates #ricochet #gnunet #freenet #android #replicant #grothoff #signal #libresignal #taler #gnutaler #youbroketheinternet #selfhosting #decentralization #selfhosted #tox #xmpp #jitsi #pond #PSYC #Tahoe-LAFS #retroshare #cjdns #onionshare #cryptocat #briar #maidsafe #coreboot #tribler #axolotl #zeroqm #bitmessage #cloud #skype #twitter #microsoft #rhizome #rina #netsukuku #tails #debian #freedombox #freedombone #ethos #qubes #whonix #guixSD #gentoo #zyre #reproduciblebuilds #openwrt #BMX7 #net2o #ethereum #copperheadOS #federation #dns #smtp #dane #blackadder #globaleaks #redphone #2020 #mesh #pulse #heartbeat

#youbroketheinternet

#youbroketheinternet

 

Meet Vitalik Buterin, the 20-Year-Old Who Is Decentralizing Everything - Shareable



"Let’s talk about net neutrality and Internet service providers — that example is fun. Right now, all Internet traffic flows through a few ISPs. They overcharge, they don’t really innovate, and they give preferential treatment to big business. For about 10 years, there has been the alternative idea of mesh networking, where we get rid of ISPs and, instead, have Internet messages relayed directly — person-to-person, laptop-to-phone-to-laptop. Theoretically, this completely solves the problems caused by ISPs. So, why hasn’t it succeeded?

The reason is that inside of one city, it works fine; but when you need to send a message, say, from Toronto to Sydney, that’s 15,000 kilometers, or 45,000 cell phone and laptop hops, even with optimal hardware. Even that assumes there are nodes going all along the ocean. It’s obviously far too slow and expensive. We need large, undersea cables and professional infrastructure for international routing. So, here’s the new solution: incentivized mesh networking. Anyone can join the network as a node. Anyone can charge for being a relay node for other people’s messages. And if I want to send a request to some server, I run a graph-search algorithm to find the shortest, cheapest path. So, if you pay a few microcents per kilobyte, your messages get transferred. If you have a phone, you can participate in the network and get a few cents an hour. Large companies can also participate. I could start a company whose sole purpose is to run and maintain a single wire going from Vancouver to Melbourne and collect fees off that. If my wire is the fastest, cheapest way to get messages over, people will use it. If I filter traffic from Wikileaks, then Wikileaks users can just use someone else’s wire instead.

The result is maximum modularity, minimum barrier to entry, an optimal marketplace. This allows you to incorporate satellites, undersea cables, intercity cables, phones, and more all into one network. That’s how we fix the Internet’s issues of monopoly and net neutrality."

#vitalik #buterin #decentralise #decentralize #internet #ISP #ethereum #crypto #crypto-currency #network #net #neutrality #netneutrality #ether #bitcoin

http://www.shareable.net/blog/meet-vitalik-buterin-the-20-year-old-who-is-decentralizing-everything?utm_content=2014-05-27%2013%3A53%3A50&utm_source=VerticalResponse&utm_medium=Email&utm_term=Meet%20Vitalik%20Buterin%2C%20the%2020-Year-Old%20Who%20is%20Decentralizing%20Everything&utm_campaign=Decentralizing%20Everything%2C%20Student%20Debt%20%26%20Food%20Forestscontent

Meet Vitalik Buterin, the 20-Year-Old Who Is Decentralizing Everything

Credit: Lightcoin on Ethereum.org. Just before last New Year’s, 19-year-old Vitalik Buterin, a Canadian college dropout and Bitcoin enthusiast, had an idea. By the end of last week, that idea had attracted more than $5 million in the first week of its pre-sale — a new kind of crowdfunding that crypto-currency makes possible. Not bad, especially considering that nobody knows whether the idea will really work.

 
Hi Diaspora*! Just signed up and getting the hang of this site. A bit about me, Huge #Nerd, #Linux #Cypherpunk #Crypto #Hacker but in the pre-1984 sense of the word. #OpenSource #Programming and #Webdesign. #Mathematics.

Any friends from #Galaxy2 ?

 

[Bitcoin Munich] Next Meetup: Thursday, Dec 22nd - Paper Wallets Workshop



https://www.meetup.com/Bitcoin-Munich/events/233919372/

Did you know you can print your bitcoins on paper and store them safely offline that way? Also holiday season is near, so we'll have an introduction talk and workshop about paper wallets, which make an original and unusual Christmas gift as well.




Apart from that, far beyond the use in Bitcoin and crypto-currencies, the concept of private and public keys, as depicted on such a paper wallet, may become more and more pervasive in the future in general. Passwords seem to be unsafe, as users forget them or pick too easy ones. And no matter what certain big hardware and OS manufacturers try to tell you, biometric identification like face or fingerprint recognition is unsafe as well and can easily be spoofed, as often demonstrated by ethical hackers.

So we'll take a look how secure (while hopefully still easy) identification and authentication may look in the future of a blockchain world. Maybe personal crypto-key management can and will some day become an intuitive habit in everyday life, just like we're used to handle our physical keys.

Target audience: Beginners

You're encouraged to bring your tablets or notebooks for this hands-on session! You should already own some bitcoins (or fractions), and have a wallet installed, e.g. Electrum.

Timetable:

19:00 Doors open, get-together, food + drinks

19:30 Bitcoin & Blockchain news roundup

20:00 Rupert Zinnecker: Paper Wallets for Crypto-Currencies
  • What are crypto-currencies?
  • How do I manage my crypto-currency units? ⇒ Wallets, especially paper wallets
  • Why do paper wallets work? ⇒ Blockchain technology
  • The paperwallet.bit website
  • Paper wallets as crypto cash, is that possible?
20:30 Workshop: Try it yourselves! And/or drinks, snacks, get-together. Open end!

You're very welcome to bring little things (cookies, tea-light candles, etc) to contribute to an xmas party atmosphere. Maybe leave a comment or contact one of the organizers so that we can better coordinate initiatives in this direction! Thank you!

#bitcoin #blockchain #meetup #munich #münchen #muc #bitcoinmuc #treffen #workshop #talk #talks #paper #wallet #paperwallet #paperwallets #crypto #cryptography #security #authentication #id #identification

Bitcoin Munich

Our monthly event with talks, presentations, demos and workshops. 
Did you know you can print your bitcoins on paper and store them safely offline that way? Also holiday season is near, so we'll

 

[Bitcoin Munich] Next Meetup: Thursday, Dec 22nd - Paper Wallets Workshop



https://www.meetup.com/Bitcoin-Munich/events/233919372/

Did you know you can print your bitcoins on paper and store them safely offline that way? Also holiday season is near, so we'll have an introduction talk and workshop about paper wallets, which make an original and unusual Christmas gift as well.




Apart from that, far beyond the use in Bitcoin and crypto-currencies, the concept of private and public keys, as depicted on such a paper wallet, may become more and more pervasive in the future in general. Passwords seem to be unsafe, as users forget them or pick too easy ones. And no matter what certain big hardware and OS manufacturers try to tell you, biometric identification like face or fingerprint recognition is unsafe as well and can easily be spoofed, as often demonstrated by ethical hackers.

So we'll take a look how secure (while hopefully still easy) identification and authentication may look in the future of a blockchain world. Maybe personal crypto-key management can and will some day become an intuitive habit in everyday life, just like we're used to handle our physical keys.

Target audience: Beginners

You're encouraged to bring your tablets or notebooks for this hands-on session! You should already own some bitcoins (or fractions), and have a wallet installed, e.g. Electrum.

Timetable:

19:00 Doors open, get-together, food + drinks

19:30 Bitcoin & Blockchain news roundup

20:00 Rupert Zinnecker: Paper Wallets for Crypto-Currencies
  • What are crypto-currencies?
  • How do I manage my crypto-currency units? ⇒ Wallets, especially paper wallets
  • Why do paper wallets work? ⇒ Blockchain technology
  • The paperwallet.bit website
  • Paper wallets as crypto cash, is that possible?
20:30 Workshop: Try it yourselves! And/or drinks, snacks, get-together. Open end!

You're very welcome to bring little things (cookies, tea-light candles, etc) to contribute to an xmas party atmosphere. Maybe leave a comment or contact one of the organizers so that we can better coordinate initiatives in this direction! Thank you!

#bitcoin #blockchain #meetup #munich #münchen #muc #bitcoinmuc #treffen #workshop #talk #talks #paper #wallet #paperwallet #paperwallets #crypto #cryptography #security #authentication #id #identification

Bitcoin Munich

Our monthly event with talks, presentations, demos and workshops. 
Did you know you can print your bitcoins on paper and store them safely offline that way? Also holiday season is near, so we'll

 
Hi Diaspora*! Just signed up and getting the hang of this site. A bit about me, Huge #Nerd, #Linux #Cypherpunk #Crypto #Hacker but in the pre-1984 sense of the word. #OpenSource #Programming and #Webdesign. #Mathematics.

Any friends from #Galaxy2 ?

 
Hi Diaspora*! Just signed up and getting the hang of this site. A bit about me, Huge #Nerd, #Linux #Cypherpunk #Crypto #Hacker but in the pre-1984 sense of the word. #OpenSource #Programming and #Webdesign. #Mathematics.

Any friends from #Galaxy2 ?

 
Immagine/foto

Sander Venema: Why I won’t recommend Signal anymore


One of the things I do is cryptography and infosec training for investigative journalists who have a need to keep either their sources and communications confidential so they can more safely do their work in the public interest. Often they work in places which are heavily surveilled, like Europe, or the United States. Ed Snowden’s documents explain a thing or two about how the US intelligence apparatus goes about its day-to-day business. They sometimes also work in places in the world where rubber hose cryptanalysis is more common than in say the U.S. or Europe. Which is why crypto tools alone are not the Alpha and the Omega of (personal) security. This requires careful consideration of what to use when, and in what situation. One of the things I have recommended in the past for various cases is the OpenWhisperSystems’ app called Signal, available for Android and iOS. In this article, I want to explain my reasons why I won’t be recommending Signal in the future.
To be clear: the reason for this is not security. To the best of my knowledge, the Signal protocol is cryptographically sound, and your communications should still be secure. The reason has much more to do with the way the project is run, the focus and certain dependencies of the official (Android) Signal app, as well as the future of the Internet, and what future we would like to build and live in. This post was mostly sparked by Signal’s Giphy experiment, which shows a direction for the project that I wouldn’t have taken. There are other, bigger issues which deserve our attention.

MORE: https://sandervenema.ch/2016/11/why-i-wont-recommend-signal-anymore/

#signal #voip #privacy #security #cryptography #crypto #google #android #apple #ios

 
Immagine/foto

Sander Venema: Why I won’t recommend Signal anymore


One of the things I do is cryptography and infosec training for investigative journalists who have a need to keep either their sources and communications confidential so they can more safely do their work in the public interest. Often they work in places which are heavily surveilled, like Europe, or the United States. Ed Snowden’s documents explain a thing or two about how the US intelligence apparatus goes about its day-to-day business. They sometimes also work in places in the world where rubber hose cryptanalysis is more common than in say the U.S. or Europe. Which is why crypto tools alone are not the Alpha and the Omega of (personal) security. This requires careful consideration of what to use when, and in what situation. One of the things I have recommended in the past for various cases is the OpenWhisperSystems’ app called Signal, available for Android and iOS. In this article, I want to explain my reasons why I won’t be recommending Signal in the future.
To be clear: the reason for this is not security. To the best of my knowledge, the Signal protocol is cryptographically sound, and your communications should still be secure. The reason has much more to do with the way the project is run, the focus and certain dependencies of the official (Android) Signal app, as well as the future of the Internet, and what future we would like to build and live in. This post was mostly sparked by Signal’s Giphy experiment, which shows a direction for the project that I wouldn’t have taken. There are other, bigger issues which deserve our attention.

MORE: https://sandervenema.ch/2016/11/why-i-wont-recommend-signal-anymore/

#signal #voip #privacy #security #cryptography #crypto #google #android #apple #ios

 
#gnupg #crypto

 
Hey everyone, I’m #newhere. I’m interested in #crypto, #l33tspeak, #linux, #lulz, and #privacy. Kittiez all0wd :)

 

Ethereum Must Drop Turing Completeness, Or It Will Fail



Great talk by Meredith tonight at the Ethereum Meetup in Munich (as announced a few posts back) that dived deep into certain aspects of blockchain protocols.



"The single one element you get from the blockchain you don't get from other tools is consensus. If you don't need consensus, you don't need a blockchain!"

In Bitcoin, the consensus is about transactions. Also its transaction language is probably context-free, but it's very cautiously and conservatively implemented. Its subset is probably regular.


In Ethereum, consensus is about .. well, anything. Its transaction language is deliberately Turing-complete, and about as readable as any other programming language.


Cryptographic Trust -- But of what?
Would you trust this contract?
How about now that I signed it?
Then why did anyone sign on with TheDAO?

How did TheDAO hack happen? http://hackingdistributed.com/2016/06/18/analysis-of-the-dao-exploit/

How do we stop this from happening again?
You don't.
Unless you're willing to listen to her: "No More Turing Complete Input Languages!"
Rice's Theorem: For any non-trivial property of partial functions, no general and effective method can decide whether an algorithm computes a partial function with that property.
Thus, Ethereum should drop its Turing-complete language, or things like TheDAO hack will happen again and again!
Meredith L. Patterson is an American technologist, science fiction writer, and journalist. She has spoken at numerous industry conferences on a wide range of topics. She is also a blogger and software developer, and a leading figure in the biopunk movement.
#owncontent #meetup #ethereum #bitcoin #muc #munich #ethmuc #security #crypto #cryptography #consensus #blockchain #cs #computerscience #linguistics #language #languages #contextfree #contextfreelanguage #regular #regularlanguage #turing #turingcomplete #turingcompleteness #thedao #hack #rice #ricestheorem #meredithpatterson #meredithlpatterson

Ethmuc 2016 09 b bitcoin consensus about transactions

Image Ethmuc 2016 09 b bitcoin consensus about transactions in Herzmeister's images album