1. Teodor Pripoae
P2P DNS Systems

2. What means DNS ?
Domain name system

3. What means DNS ?
Domain name system
Hierachical distributed naming system

4. What means DNS ?
Domain name system
Hierachical distributed naming system
Controlled by ICANN

5. Why changing DNS ?
Controlled by a single entity

6. Why changing DNS ?
Controlled by a single entity
Very easy to take down a domain by
American Government or Hollywood
Media Corporations with similar laws
to ACTA or SOPA

7. Looks familiar ?

8. Alerternative ?

9. P2P DNS System

10. Features
What should feature a distributed DNS system ?

11. It must not have any single entity
that controls the others
Conclusion: it must be P2P with not
central node
It must be open source

12. Implementations
P2P-DNS: https://github.com/Mononofu/P2P-DNS
Namecoin: http://dot-bit.org/Namecoin
Censormenot:
https://github.com/teodor-pripoae/censormenot

13. P2P-DNS
Records authenticated by a
public/private key system
All nodes know all othe nodes and the
cache all know domains

14. Attacks
Atack 1: An attacker can only poison
the cache of a single node
Atack 2: An attacker can flood the
network with fake domains

15. Defense methods
For attack 1: opinion of the majority
is correct and a web trust (opinions
of nodes are weighted by your trust
to them.
For attack 2: similar tools used for
email spam prevention systems

16. Disadvantages
Storing all key pairs
Everyone can register any domain now
even those which already exist in the
real dns system

17. Namecoin
Based on bitcoin system
.bit TLD
Similar private/public keys
encryption
Buy domains with namecoins which can
be converted from bitcoins

18. Censormenot
Why is it different ?

19. Not a full dns system, but a cache
one

20. Not a full dns system, but a cache
one
Add a domain lookup only when you
need it.

21. Not a full dns system, but a cache
one
Add a domain lookup only when you
need it.
Multiple plausible domains based on a
trust value which can be voted

22. How it looks / works ?

23. Resources
https://github.com/namecoin/namecoin
https://github.com/Mononofu/P2P-DNS
https://github.com/teodor-pripoae/censorm
http://www.youtube.com/watch?v=YNZDhPIdah

24. Contributors
Dan Serban:
https://github.com/dserban
Alexandru Tache
https://github.com/hadesgames