Re: Sybil attack?

2015-02-16 Thread Natanael 
Den 16 feb 2015 12:53 skrev Adonay Sanz adonay.s...@gmail.com:

 Hi Natanael
 Thanks for answering. Really I'm noob in this area.

 I wanted to use I2P version. So, it's no possible way present or future
to block it? It's a really threat?
 Can you explainme better what it means configured to mimic Freenet?

Freenet caches files you request, and caches some files other people
request via you. Then it replies to requests from others and forwards
requests as well. Tahoe-LAFS in I2P mode mimics this behaviour.

In I2P it isn't certain you'll be able to find honest nodes which have the
data you are asking for. They can send fake replies, and even though your
software will know the replies are wrong it will have to spend a lot of
effort on searching for the correct data. So a Sybil attack can be used for
censorship.

But if you know of honest nodes, and the honest nodes are well connected in
the network, then the requests will reach those nodes and the correct reply
will come back. But the fake nodes can overload the honest nodes to slow
things down.
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Re: tahoe-dev Digest, Vol 95, Issue 9

2015-02-16 Thread ihave2p 
Hello Adonay,

I recommend visting #tahoe-lafs on Irc2P for I2P-related Tahoe-LAFS
questions.

Don't forget: I2P isn't Tor, and the Sybil model is different.
https://geti2p.net/en/docs/how/threat-model#sybil

Also, even if 20 out of 30 Tahoe-LAFS-I2P nodes are compromised, it's
then down to a matter of breaking the encryption (like what Natanael had
implied). The difficulty of doing that is well-documented.


ihave2p
http://ihave2p.i2p

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1. Sybil attack? (Adonay Sanz)
2. Re: Sybil attack? (Natanael)
3. Re: Sybil attack? (Adonay Sanz)
 
 
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 Message: 1
 Date: Mon, 16 Feb 2015 11:41:25 +0100
 From: Adonay Sanz adonay.s...@gmail.com
 To: tahoe-dev@tahoe-lafs.org
 Subject: Sybil attack?
 Message-ID:
   CAHhxunq5k3PMMSqyTv2kaULAZDW=dhsr9cdbxvbt6t9ez+z...@mail.gmail.com
 Content-Type: text/plain; charset=utf-8
 
 Hi,
 I'm reading your documentation and has Tahoe-LAFS any sybil attack
 protection? or does it really matter? Can be implemented some solution?
 
 Thanks for answer
 
 Cheers!
 Adonay Sanz
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 Message: 2
 Date: Mon, 16 Feb 2015 12:14:27 +0100
 From: Natanael natanae...@gmail.com
 To: Adonay Sanz adonay.s...@gmail.com
 Cc: tahoe-dev@tahoe-lafs.org
 Subject: Re: Sybil attack?
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   CAAt2M1-WH6T-Hx8C5sqpAxbE7F+=-3taqsu_7jj5-ucdiqd...@mail.gmail.com
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 Den 16 feb 2015 11:42 skrev Adonay Sanz adonay.s...@gmail.com:
 
  Hi,
  I'm reading your documentation and has Tahoe-LAFS any sybil attack
 protection? or does it really matter? Can be implemented some solution?
 
 Tahoe-LAFS in the default configuration don't rely on unknown nodes, so
 there Sybil isn't a problem. And because of in-built authentication of all
 data, a Sybil attack could at most prevent access to the data (or just to
 chosen parts of or versions of the data), a form of denial of service.
 Can't fake the data.
 
 The I2P version could be affected (as it is configured to mimic Freenet).
 Standard usage isn't.
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 Message: 3
 Date: Mon, 16 Feb 2015 12:53:16 +0100
 From: Adonay Sanz adonay.s...@gmail.com
 To: tahoe-dev@tahoe-lafs.org
 Subject: Re: Sybil attack?
 Message-ID:
   CAHhxunq4FFdzUhLyz5JZOMCpdFUYL=_k2pprxt3_qyxprox...@mail.gmail.com
 Content-Type: text/plain; charset=utf-8
 
 Hi Natanael
 Thanks for answering. Really I'm noob in this area.
 
 I wanted to use I2P version. So, it's no possible way present or future to
 block it? It's a really threat?
 Can you explainme better what it means configured to mimic Freenet?
 
 Thanks a lot
 
 
 Adonay
 
 
 2015-02-16 12:14 GMT+01:00 Natanael natanae...@gmail.com:
 
 
  Den 16 feb 2015 11:42 skrev Adonay Sanz adonay.s...@gmail.com:
  
   Hi,
   I'm reading your documentation and has Tahoe-LAFS any sybil attack
  protection? or does it really matter? Can be implemented some solution?
 
  Tahoe-LAFS in the default configuration don't rely on unknown nodes, so
  there Sybil isn't a problem. And because of in-built authentication of all
  data, a Sybil attack could at most prevent access to the data (or just to
  chosen parts of or versions of the data), a form of denial of service.
  Can't fake the data.
 
  The I2P version could be affected (as it is configured to mimic Freenet).
  Standard usage isn't.
 
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Sybil attack?

2015-02-16 Thread Adonay Sanz 
Hi,
I'm reading your documentation and has Tahoe-LAFS any sybil attack
protection? or does it really matter? Can be implemented some solution?

Thanks for answer

Cheers!
Adonay Sanz
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Re: Sybil attack?

2015-02-16 Thread Natanael 
Den 16 feb 2015 11:42 skrev Adonay Sanz adonay.s...@gmail.com:

 Hi,
 I'm reading your documentation and has Tahoe-LAFS any sybil attack
protection? or does it really matter? Can be implemented some solution?

Tahoe-LAFS in the default configuration don't rely on unknown nodes, so
there Sybil isn't a problem. And because of in-built authentication of all
data, a Sybil attack could at most prevent access to the data (or just to
chosen parts of or versions of the data), a form of denial of service.
Can't fake the data.

The I2P version could be affected (as it is configured to mimic Freenet).
Standard usage isn't.
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Re: Sybil attack?

2015-02-16 Thread Adonay Sanz 
Hi Natanael
Thanks for answering. Really I'm noob in this area.

I wanted to use I2P version. So, it's no possible way present or future to
block it? It's a really threat?
Can you explainme better what it means configured to mimic Freenet?

Thanks a lot


Adonay


2015-02-16 12:14 GMT+01:00 Natanael natanae...@gmail.com:


 Den 16 feb 2015 11:42 skrev Adonay Sanz adonay.s...@gmail.com:
 
  Hi,
  I'm reading your documentation and has Tahoe-LAFS any sybil attack
 protection? or does it really matter? Can be implemented some solution?

 Tahoe-LAFS in the default configuration don't rely on unknown nodes, so
 there Sybil isn't a problem. And because of in-built authentication of all
 data, a Sybil attack could at most prevent access to the data (or just to
 chosen parts of or versions of the data), a form of denial of service.
 Can't fake the data.

 The I2P version could be affected (as it is configured to mimic Freenet).
 Standard usage isn't.

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