Freenet Project: Leap over Censorship
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1 Freenet Project: Leap over Censorship The technical part of the solution for freedom of the press in the internet Arne Babenhauserheide 25. September 2014 Freenet Project
2 Outline 1 Why? 2 About 3 Applications 4 Tech 5 Appendix Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
3 Why Freenet? I worry about my child and the Internet all the time, even though she s too young to have logged on yet. Here s what I worry about. I worry that 10 or 15 years from now, she will come to me and say Daddy, where were you when they took freedom of the press away from the Internet? Mike Godwin, Electronic Frontier Foundation, Fear of Freedom (1995) Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
4 Why now? Dark Times There is now no shield from forced exposure... The foundation of Groklaw is over... the Internet is over Groklaw, Forced Exposure ( ) Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
5 Why now? A New Old Hope 1995: At a Crossroad: Surveillance or Freedom. 1999: Freenet starts. 2001: 9/11. The war on terror starts. 2013: Snowden. Precious time to turn back the wheel. Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
6 What is Freenet? Freenet is the technical part of the solution for freedom of the press in the internet. Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
7 THE technical part? Other projects Pure Transport e.g. tor, i2p No offline hosting vulnerable to DoS correlation attacks This killed the Black Goblin Market Hosting with cost e.g. TAHOE-LAFS, MaidSafe Fixed storage: When it is full, it is full DoS-resistance? Spam-resistance? Cost? Good content often comes from small publishers. Pure messaging e.g. bitmessage, invisible.im No publishing No offline hosting Server-based e.g. SecureDrop Requires powerful infrastructure DoS-able Timing attacks (correlation) GNUnet? Good, but more filesharing than publishing. Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
8 THE technical part? Freenet Communication persistent pseudonyms spam resistance via WoT multiple applications (Sone, FMS, Fre , FlogHelper,... ) Publishing offline hosting Join, drop content, leave. decaying storage lifetime depends on user demand Proven track record of providing censorship resistant publishing and communication since Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
9 The TECHNICAL part? Tech alone is not enough Complete blocking and surveillance is possible. Politics alone is not enough If surveillance and censorship are trivial, they will be done. Tech and Politics Privacy technology provides the background on which politics can work: Making surveillance and censorship expensive and hard enough that we can win the political battle. The NSA surveillance doesn t scale. Constanze Kurz (EuroPython 2014) Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
10 Now Concrete :8888 ssh -NL 8888:localhost:8888 <host> Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
11 Who are we? 2 donation-funded part time developers: toad and xor. About a dozen free time developers. Some anonymous contributors. Communication mostly over IRC irc.freenode.net) and FMS (in Freenet). Why? About Applications Arne Babenhauserheide Freenet Project: Leap over Censorship Abbildung : Some Freenet developers at CTS4. From left to right: ArneBab, toad, leuchtkaefer and digger3. Tech 25. September 2014 Appendix 11/42
12 Current State Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
13 Current Stats Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
14 Project Summary Freenet provides essential features for freedom of press. Tech creates the background needed to win the political battle. Freenet was created 14 years ago and improved constantly. Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
15 Applications File Hosting Site hosting Confidential Messaging DVCS Microblogging Spam resistance Forums Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
16 File Hosting pastebin, file hoster, encrypted chunks, redundancy. Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
17 Site Hosting we call them freesites. Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
18 Site creation jsite (GUI) freesitemgr (pyfreenet) Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
19 Easier sites: Sharewiki Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
20 Blogging: Flog Helper Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
21 Confidential Messaging Darknet messaging Talk to friends who run Freenet Hide metadata in Freenet traffic with file hosting confidential pastebin invisible and encrypted like all file uploads before sharing the key Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
22 with hidden metadata Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
23 DVCS $ cd /tmp $ hg clone freenet://usk@j2mfv0b81mnsslh3qg9gs1vgqj36whsuosp8ydzq158,xb~vh8xexmdwg Current USK version: 17 Fetching bundles Pulled bundle: (-1, 0, 1)... Pulled bundle: (0, 9, 0)... Pulled bundle: (9, 16, 0) As basic protection, infocalypse automatically set the username anonymous for commits in this repo, changed the commands commit and ci to fake UTC time and added clt which commits in the local timezone. To change this, edit /tmp/freenet-funding/.hg/hgrc Mercurial infocalypse pyfreenethg (old) Git egit-freenet Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
24 Microblogging: Sone Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
25 Spam resistance Web of Trust Propagating trust Generalized Used by plugins (i.e. Sone) FMS Explicit Trust Lists One Shot IDs Shared Properties CAPTCHAs for introduction Take a while to find existing People Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
26 Web of Trust Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
27 Forums: FMS Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
28 Comments on the Clearweb See draketo.de/proj/freecom and draketo.de/english/freenet/spam-resistant-decentral-comments Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
29 Language Bindings Java - in core Plugin Writing: wiki.freenetproject.org/plugin_development_tutorial Freenet Client Protocol: wiki.freenetproject.org/fcpv2 Python - pyfreenet Perl*: Ruby*: Ada*: *: I did not test these, yet. I don t know whether they actually work. Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
30 Application Summary Do you miss anything? Join us and create it! Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
31 Why not as big as tor? Focus Hard problems solved, but not polished Lots of low hanging fruit Money Freenet: 2 part time developers Tor: 20 full time developers Tor is military funded. Freenet does not help hack foreign servers. Do the math :) Fundraising We try to get more focus and money. Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
32 Tech capabilities routing simulation Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
33 About the tech Datastore decentralized on the computers of users encrypted chunks of files key (URL) to assemble, decrypt and identify anonymous pseudonyms public/private key publishing lifetime by demand Routing small world: scale free optional friend-to-friend (Darknet) location: [0..1) for each file chunk and node find route: from node to file chunk forward data: travels along the route Applications subscribe to keys: 30s to 30 min round trip time. base for applications: Websites, Forums, Microblogging, Chat. spam resistance: Web of Trust (2 implementations). Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
34 Small World Routing Abbildung : Finding the route to a chunk of data. Greedy Routing on Scale Free structure. Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
35 Network structure optimization Opennet Optimize peer-connections via success-metric Distance Constraint maximum number of long connections Darknet (friend-to-friend) Assume small world connections to people known in real life Reconstruct the structure by swapping locations Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
36 Routing Simulation Random Routing Small World Routing Abbildung : 10 paths between locations on a random network with 1000 nodes. Average path length: 105. Abbildung : 10 paths between locations on a small world network with 1000 nodes. Average path length: 5. Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
37 Link lengths in the Simulations Abbildung : Link length distribution in the simulated small world and random networks. Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
38 Measured Network Structure Abbildung : Link length distribution in Freenet. The green line would be an ideal network. Blue would be a random network. Red is the measured distribution. Randomization from local requests, churn and inhomogenity in the network skew the distribution. Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
39 Additional notes Performance Upload 150 MiB in 1 day Download 1 GiB in 1 day With max bandwidth set to 80kBps and average 50-60kBps. Optimizations FOAF routing Caching... Missing in the simulation. Capacity Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
40 Tech Summary Small World Structure Measured fits simulated It scales Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
41 Summary Freenet is the technical part of the solution for freedom of the press in the internet. Decentral, anonymous datastore. Many applications. Started in Scales. Fundraising We want to raise money to make Freenet perfect for Journalists. Info: draketo.de/proj/freenet-funding Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
42 Get Freenet! freenetproject.org This presentation: github.com/arnebab/freenet-fundraising Donate: freenetproject.org/donate.html Bitcoin: 1966U1pjj15tLxPXZ19U48c99EJDkdXeqb Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
43 Contribute Write Code Run a Node Build the Darknet Spread the Word Contribute Fundraising Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
44 Write Code IRC: irc.freenode.net Contribute Fundraising Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
45 Run a node Running a Node wget -O installer.jar java -jar installer.jar -console # (follow the prompts) # info: # { console start stop restart status dump } As Seednode simple howto found on Contribute Fundraising Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
46 Build the Darknet Contribute Fundraising Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
47 Spread the Word Because we are crappy at PR. These slides: draketo.de/proj/freenet-funding/slides.pdf github.com/arnebab/freenet-fundraising Contribute Fundraising Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
48 Summary Write Code Run a Node Build the Darknet Spread the Word Contribute Fundraising Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
49 Fundraising Goal What we need 2 year vision Contribute Fundraising Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
50 Goal: Journalists and Whistleblowers maintain journalist site contact a journalist via the site traceless persistent pseudonym (QR or written key) Freenet-stick, preseeded invisible darknet (steganography) grow the darknet over mobile Contribute Fundraising Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
51 What we need Minimal 2 coders one part time 1 outreach 1 coordinator and coder 2 years 620k Euro Good 2 coders 1 UX 1 outreach 1 coordinator 3 years 1.5M Euro Ideal 3 coders 2 UX 2 outreach 1 coordinator 5 years 3.8M Euro If you are in contact with human rights groups who might want to fund us, please get in touch! Contribute Fundraising Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
52 2 year vision Nick, Journalist Republish on Freenet from Janice Ask to verify the leak Help her keep out of trouble Run the story Janice, Whistleblower Use Freenet in cafés Select Nick by site Send leaked documents Reply to questions Lie Low Leak again All already possible, but not easy. Contribute Fundraising Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
53 Going further publication and collaboration: platform for political bloggers social network with privacy by design programming platform backend for the web: comment system for websites exchanging files with friends harder to detect and block: hide data in VoIP stream hiding data in attachments pre-filled USB-sticks to exchange with collegues and friends... and many more - see Steganography Contribute Fundraising Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
54 What is in it for me? Secure Environment If it s safe enough for whistleblowers, it s safe enough to give you privacy. Hide in the Forest The more people use Freenet, the safer it gets for everyone. Bigger anonymity set. Privacy by Default Easy enough for everyday communication. Journalists need that. Contribute Fundraising Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
55 Fundraising Summary Freenet for Journalists and Whistleblowers Already possible but not easy Finance a group of full time Freenet hackers 3-8 people, 2-5 years 620k Euro to 3.8M Euro Contribute Fundraising Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
56 Get Freenet! freenetproject.org This presentation: github.com/arnebab/freenet-fundraising Donate: freenetproject.org/donate.html Bitcoin: 1966U1pjj15tLxPXZ19U48c99EJDkdXeqb Contribute Fundraising Arne Babenhauserheide Freenet Project: Leap over Censorship 25. September /42
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