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Internet v2.0? Rethinking the Internet - exemplified by Cjdns Lasse Grinderslev Andersen 20th of July, 2015 @ The Camp Lasse Grinderslev Andersen Internet v2.0? Contents of this talk Introduction The Internet History of the Internet Basic

  1. Internet v2.0? Rethinking the Internet - exemplified by Cjdns Lasse Grinderslev Andersen 20th of July, 2015 @ The Camp Lasse Grinderslev Andersen Internet v2.0?

  2. Contents of this talk Introduction The Internet History of the Internet Basic mechanics Challenges Cjdns Technical outline Present status Future Lasse Grinderslev Andersen Internet v2.0?

  3. Contents of this talk Introduction The Internet History of the Internet Basic mechanics Challenges Cjdns Technical outline Present status Future Lasse Grinderslev Andersen Internet v2.0?

  4. Contents of this talk Introduction The Internet History of the Internet Basic mechanics Challenges Cjdns Technical outline Present status Future Lasse Grinderslev Andersen Internet v2.0?

  5. Introduction Why this talk? Internet is a fundamental/generative/general technology The Internet was made under completely different circumstances than today Cjdns is a daring (and experimental!) attempt at rethinking this basic technology. Lasse Grinderslev Andersen Internet v2.0?

  6. Introduction Why this talk? Internet is a fundamental/generative/general technology The Internet was made under completely different circumstances than today Cjdns is a daring (and experimental!) attempt at rethinking this basic technology. Lasse Grinderslev Andersen Internet v2.0?

  7. Introduction Why this talk? Internet is a fundamental/generative/general technology The Internet was made under completely different circumstances than today Cjdns is a daring (and experimental!) attempt at rethinking this basic technology. Lasse Grinderslev Andersen Internet v2.0?

  8. Rough outline of Internet development < 1973 Packet switching but numerous networks: ARPANET, CYCLADES, etc. - unable to talk! Lasse Grinderslev Andersen Internet v2.0?

  9. Rough outline of Internet development 1973-83 Robert E. Kahn & Vinton Cerf (et.al) standardized communication across different networks: TCP/IP. Unique address-format across networks Networks connected by gateways Simplicity in design ⇒ End-to-end principle By academics for academics Lasse Grinderslev Andersen Internet v2.0?

  10. Rough outline of Internet development 1973-83 Robert E. Kahn & Vinton Cerf (et.al) standardized communication across different networks: TCP/IP. Unique address-format across networks Networks connected by gateways Simplicity in design ⇒ End-to-end principle By academics for academics Lasse Grinderslev Andersen Internet v2.0?

  11. Rough outline of Internet development 1973-83 Robert E. Kahn & Vinton Cerf (et.al) standardized communication across different networks: TCP/IP. Unique address-format across networks Networks connected by gateways Simplicity in design ⇒ End-to-end principle By academics for academics Lasse Grinderslev Andersen Internet v2.0?

  12. Rough outline of Internet development 1973-83 Robert E. Kahn & Vinton Cerf (et.al) standardized communication across different networks: TCP/IP. Unique address-format across networks Networks connected by gateways Simplicity in design ⇒ End-to-end principle By academics for academics Lasse Grinderslev Andersen Internet v2.0?

  13. Rough outline of Internet development 1983-90 Gradual commercialisation : Military part of ARPANET broke off in 1983. Several US government bodies working on TCP/IP networks, NASA, NSF, Dept. of Energy etc. Lasse Grinderslev Andersen Internet v2.0?

  14. Rough outline of Internet development 1983-90 Gradual commercialisation : Military part of ARPANET broke off in 1983. Several US government bodies working on TCP/IP networks, NASA, NSF, Dept. of Energy etc. Lasse Grinderslev Andersen Internet v2.0?

  15. Rough outline of Internet development 1983-90 Gradual commercialisation : 1986 NSFNET started up: Six 56kbit/s backbones connecting universities and their super computers. ”primarily for research and education in the sciences and engineering.” Lasse Grinderslev Andersen Internet v2.0?

  16. Rough outline of Internet development 1983-90 Gradual commercialisation : 1988 T1 upgrade: Thirteen 1.5mbit/s backbones. Many networks joined in, e.g., NASA (NSN), US Military (MILNET) etc. ARPANET decomissioned 1990. Lasse Grinderslev Andersen Internet v2.0?

  17. Rough outline of Internet development 1983-90 Gradual commercialisation : 1991 T3 upgrade: Sixteen 45mbit/s backbones. 1995 Goverment backbones replaced by commerical ISPs. Lasse Grinderslev Andersen Internet v2.0?

  18. The Internet now Basic functioning of the Internet: AS numbers and IP blocks are delegated by IANA AS holders routes prefixes to each other using BGP Lasse Grinderslev Andersen Internet v2.0?

  19. The Internet now Basic functioning of the Internet: Huge network but security was not built into core protocols Lasse Grinderslev Andersen Internet v2.0?

  20. The Internet now - challenges Issues & solutions Data encryption ⇒ TLS/SSL, VPN, IPSEC Authenticity ⇒ CA, CRL, OCSP (stapling), DNSSEC, PGP Lasse Grinderslev Andersen Internet v2.0?

  21. The Internet now - challenges Issues & solutions Route hijacking ⇒ BGPSEC (RPKI) Centralized administration of network addresses Lasse Grinderslev Andersen Internet v2.0?

  22. Cjdns - Overview What Cjdns isn’t : Tor replacement Something to do with DNS (yes, silly name!) What Cjdns tries to be: Decentralized routing (friend-2-friend, no central address management) Secure (data encryption & authenticity) Modular (generate address and connect to peer) A system is only secure if nobody has total control. - Caleb James DeLisle Lasse Grinderslev Andersen Internet v2.0?

  23. Cjdns - Overview What Cjdns isn’t : Tor replacement Something to do with DNS (yes, silly name!) What Cjdns tries to be: Decentralized routing (friend-2-friend, no central address management) Secure (data encryption & authenticity) Modular (generate address and connect to peer) A system is only secure if nobody has total control. - Caleb James DeLisle Lasse Grinderslev Andersen Internet v2.0?

  24. Cjdns - Overview Overall architecture Decentralized routing layer (DHT) using pub-keys as virtual addresses Simple packet switching/forwarding layer Crypto-layer creating encrypted tunnels for sending down packets Lasse Grinderslev Andersen Internet v2.0?

  25. Cjdns - Routing Separation between physical links and address space Virtual address space used to locate nodes by routers Pub-keys as addresses ⇒ identity-integrity at transport layer . Hash of pubkey used as ipv6 address (fc00:/9) Lasse Grinderslev Andersen Internet v2.0?

  26. Cjdns - Switching Sending packets does not require the router: Routing label: Network path expressed as series of switch-directors Switching labels are not unique and vary in size When a packet travels through the network the label is changed s.t. the return label is obtained by reversing the route label. Lasse Grinderslev Andersen Internet v2.0?

  27. Cjdns - Crypto & Security Tunnels of encrypted traffic are created between node Verified by address/pubkey but using symmetric encryption (afaik) ⇒ infeasible to eavesdrop ⇒ man-in-the-middle attack infeasible No need to use encryption in applications and relying on CA/DNS for identity! ...although malicious nodes can advertise false routes Lasse Grinderslev Andersen Internet v2.0?

  28. Cjdns - Status/challenges Uses of cjdns atm. hyperboria: Global (testing) network based on ’friend-2-friend’ peering (few public nodes) Use in meshnets, e.g, in Seattle, Vancouve, London etc. Some of these also provide internet tunneling. Russia? Highly experimental, not well-documented etc. Lasse Grinderslev Andersen Internet v2.0?

  29. Cjdns - future Future uses: Global network for privacy/hackers/computer entusiasts? Privacy enhancement? Developments: Anycast? CIDR-style blocks? Lasse Grinderslev Andersen Internet v2.0?

  30. Cjdns - future Inspect/test routing/network discovery algorithms and design details. Lasse Grinderslev Andersen Internet v2.0?

  31. Tak for jeres opmærksomhed! :-) Lasse Grinderslev Andersen Internet v2.0?

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