this post was submitted on 21 Oct 2023
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It is a different anonymity network, which works differently in many aspects.
I2P and Tor comparison: https://geti2p.net/en/comparison/tor
I2P on Bittorrent (mostly a client dev guide, but has some interesting info): https://geti2p.net/en/docs/applications/bittorrent
Currently BiglyBt supports I2P and it has been that way for quite some time.
If you use qBittorrent, I2P support will come in version 4.6. you can try it out now with the published release candidate version. Probably other clients are working on it too as the support is coming from the libtorrent programming library, which is used by other clients too.
Right now, I2P is quite slow in my experience, in terms of loading I2P websites. I hope that it's just a misconfiguration on my part, or that these specific sites I tried are just overloaded.
...
Near as I can tell:
Tor is about privacy (and is prone to being compromised but...). So long as the exit nodes are in "friendly" countries and are run by trustworthy individuals (...), you are "safe". And that is why it is popular among journalists. The downside being that a lot of heinous shit is done on Tor and those exit nodes are potentially liable for them.
I2P is about avoiding censorship. Everyone is an exit node and cops kicking down doors doesn't significantly hurt the network.
But... I would very much NOT use that for torrenting. Because the endpoints can still be detected and recorded. And "I wasn't downloading that Tay Swizzle concert, I was just letting potentially thousands of other people use my computer to download it... Why did you suddenly start laughing and talking about The Pirate Bay?".
And that also ignores the "darker" parts of the dark web. Where, rather than getting a letter from the MPAA you get a visit from Chris Hansen.
On i2p everyone is a node but not everyone is an outproxy to the clearnet, you have to enable it manually.
It is not true that every node is an exit node in I2P. The I2P protocol does not officially have exit nodes—all I2P communication terminates at some node within the I2P network, encrypted end-to-end. It is possible to run a local proxy server and make it accessible to other users as an I2P service, creating an "exit node" of sorts, but this is something that must be set up deliberately; it's not the default or recommended configuration. Users would need to select a specific I2P proxy service (exit node) to forward non-I2P traffic through and configure their browser (or other network-based programs) to use it.
Maybe I am missing something but that just feels like you are arguing semantics.
Traffic exits the sub-WAN from basically any of the computers/nodes in it. So it might not be a Tor Exit Node (TM) but it still has all the dangers of it.
No, that's not how I2P works.
First, let's start with the basics. An exit node is a node which interfaces between the encrypted network (I2P or Tor) and the regular Internet. A user attempting to access a regular Internet site over I2P or Tor would route their traffic through the encrypted network to an exit node, which then sends the request over the Internet without the I2P/Tor encryption. Responses follow the reverse path back to the user. Nodes which only establish encrypted connections to other I2P or Tor nodes, including ones used for internal (onion) routing, are not exit nodes.
Both I2P and Tor support the creation of services hosted directly through the encrypted network. In Tor these are referred to as onion services and are accessed through *.onion hostnames. In I2P these internal services (*.i2p or *.b32) are the only kind of service the protocol directly supports—though you can configure a specific I2P service linked to a HTTP/HTTPS proxy to handle non-I2P URLs in the client configuration. There are only a few such proxy services as this is not how I2P is primarily intended to be used.
Tor, by contrast, has built-in support for exit nodes. Routing traffic anonymously from Tor users to the Internet is the original model for the Tor network; onion services were added later. There is no need to choose an exit node in Tor—the system maintains a list and picks one automatically. Becoming a Tor exit node is a simple matter of enabling an option in the settings, whereas in I2P you would need to manually configure a proxy server, inform others about it, and have them adjust their proxy configuration to use it.
If you set up an I2P node and do not go out of your way to expose a HTTP/HTTPS proxy as an I2P service then no traffic from the I2P network can be routed to non-I2P destinations via your node. This is equivalent to running a Tor internal, non-exit node, possibly hosting one or more onion services.
Fair enough. Then you have the exact same risks as far as torrenting (the point of this thread) are confirmed. But still increased risks as far as csam.
What "increased risks as far as csam"? You're not hosting any yourself, encrypted or otherwise. You have no access to any data being routed through your node, as it's encrypted end-to-end and your node is not one of the endpoints. If someone did use I2P or Tor to access CSAM and your node was randomly selected as one of the intermediate onion routers there is no reason for you to have any greater liability for it than any of the ISPs who are also carrying the same traffic without being able to inspect the contents. (Which would be equally true for CSAM shared over HTTPS—I2P & Tor grant anonymity but any standard password-protected web server with TLS would obscure the content itself from prying eyes.)
You are still possessing csam while being used as a node to transit it.
A compromised (or even honey pot) node can show all the people who were "just holding it for a friend". And ignoring that ISPs have historically cooperated in investigations, they also have many more lawyers.
So regardless of your ethical/moral concerns over facilitating the transit of csam, you are opening yourself up to being caught in a semi-tech savvy investigation.
This is not how the law is applied to packet switching.
If it was store and forward then maybe just maybe law enforcement would care, but anybody smart enough to set up an I2P node to research it and who tried to track where packets from from would first see the packets originate from their own local node at 127.0.0.1, then in the I2P console they could see that packet came in via an active half-tunnel from their own end interfacing with the endpoint node of the other side's half-tunnel, and they would know that node has no idea what it's sending (just like their ISP)
1: then they would go after literally anybody running a node
2: their client will not see peers on another IP. It will just see their own I2P node. Any I2P aware software will also not have any IP addresses as peers, only I2P specific internal addresses. They will not even be able to associate an incoming connection to any one node without understanding the I2P network statistics console.
3: by this argument all anonymization tools should be illegal, Signal too, etc, and nobody should help anybody maintain privacy. In the real world there's plenty of reasons why anonymization tools are necessary. And there will be literally zero evidence tying you to a crime. Preexisting legal precedence says an IP address alone is not enough.
ACAB? Also, I'll get back to this
And only people with similar politics to you will ever gain that understanding? Again, more on this
And countries around the world are increasingly pushing legislature to make "anonymization" and "encryption" tools illegal (or at least require backdoors).
Which gets back to the politics aspect. Even among those of us who care about personal security (which, again, has nothing to do with torrenting but here we are), the likelihood of others to use it for nefarious and evil purposes is a problem. I've taught a few journalist friends how to use tor but I personally do not because that, and tools like i2p, tend to also be used for csam and I have pretty strong morals and ethics about not facilitating the dissemination of that.
And, as we remember once or twice a year, there are "hacktivist" groups out there who like to have a field day. And compromising tools used for the distribution of csam is something that many groups do.
But also? Those piece of shit cops and governments trying to get their fascism on? It is a lot easier to push for "extreme measures" when it is going up against pedophiles and child abuse. We saw similar with how the US (and other western nations) cracked down on immigration under the guise of "stopping the Muslims from doing another 9-11". And we are likely to see similar come out of the Israel/Palestine war.
MAYBE you get a really good lawyer so that you can get off on... Maybe you get a really good lawyer who cites the proper legal precedents AND a judge AND a jury who actually care about that. You have still had your reputation ruined for "being a pedophile" and laws are already being pushed to make using any of these tools illegal to begin with. And The People will generally support it because CSAM.
And getting back to "an IP address isn't enough": Yes, some judges have decided that. Was it Avatar that was the big case people like to cite? Been a minute. But that doesn't stop other judges who just don't give a shit about precedent still providing the subpoenas. And considering that getting the equivalent of a peer list requires "understanding the i2p network statistics console": There are likely to be additional "fingerprints" involved. I've not spend much time looking at said console so am assuming there is nothing as stupid as a mac address, but it becomes a lot harder to say "Old Lady Withers across the street was using my wifi".
Just because people are stupid and this is the inevitable drive by from the peanut gallery:
No, I am not saying that everyone who uses tor or i2p or whatever are pedophiles. What I am saying is that those are tools that are pretty notorious for being used to distribute and share csam. And while some people are okay with "Oh yeah, my private browsing of this website helped to mask child porn but I personally didn't look at or share any", I am not.
Your scenario would specifically require the cops to ask their techs for a detailed report and then deliberately lie about it's conclusions to attack completely random people, and just FYI the last few rounds of this happened when public WiFi was new and the cops kept losing so badly in courts that this doesn't really happen much anymore. You don't even need a great lawyer, just an average one who can find the precedence.
There's no "additional fingerprints" of relevance binding any node in a tunnel to the communications in the tunnel. It uses PFS and multiple layers of encryption (tunnels within tunnels). They need to run a debugger against their node to have any chance to really argue that a specific packet came from a specific node, which also would ironically simultaneously prove that node didn't actually know and was just a blind relay (just like how mailmen aren't liable for content of packages they deliver).
Your argument is literally being used to argue that nobody should have privacy because those who don't break laws don't need it, yet you yourself are arguing for why we still need privacy if we haven't broken laws. The collateral damage when such tools aren't available is so much greater than when privacy tools are available. One of the greatest successes of Signal is how its popularity makes each of its users part of a "haystack" (large anonymity set) and targeting individual users just for using it is infeasible, protecting endless numbers of minorities and other at-risk individuals.
In addition, it's extremely rare that mass surveillance like spying on network traffic leads to prosecutions. It's usually infiltration that works, so you running an I2P node will make zero difference.
I2P doesn't really have exit nodes. You can only browse within the I2P network.
Out proxies are a thing