cross-posted from: https://feddit.uk/post/1248314
DEF CON Infosec super-band the Cult of the Dead Cow has released Veilid (pronounced vay-lid), an open source project applications can use to connect up clients and transfer information in a peer-to-peer decentralized manner.
The idea being here that apps – mobile, desktop, web, and headless – can find and talk to each other across the internet privately and securely without having to go through centralized and often corporate-owned systems. Veilid provides code for app developers to drop into their software so that their clients can join and communicate in a peer-to-peer community.
In a DEF CON presentation today, Katelyn “medus4” Bowden and Christien “DilDog” Rioux ran through the technical details of the project, which has apparently taken three years to develop.
The system, written primarily in Rust with some Dart and Python, takes aspects of the Tor anonymizing service and the peer-to-peer InterPlanetary File System (IPFS). If an app on one device connects to an app on another via Veilid, it shouldn’t be possible for either client to know the other’s IP address or location from that connectivity, which is good for privacy, for instance. The app makers can’t get that info, either.
Veilid’s design is documented here, and its source code is here, available under the Mozilla Public License Version 2.0.
“IPFS was not designed with privacy in mind,” Rioux told the DEF CON crowd. “Tor was, but it wasn’t built with performance in mind. And when the NSA runs 100 [Tor] exit nodes, it can fail.”
Unlike Tor, Veilid doesn’t run exit nodes. Each node in the Veilid network is equal, and if the NSA wanted to snoop on Veilid users like it does on Tor users, the Feds would have to monitor the entire network, which hopefully won’t be feasible, even for the No Such Agency. Rioux described it as “like Tor and IPFS had sex and produced this thing.”
“The possibilities here are endless,” added Bowden. “All apps are equal, we’re only as strong as the weakest node and every node is equal. We hope everyone will build on it.”
Each copy of an app using the core Veilid library acts as a network node, it can communicate with other nodes, and uses a 256-bit public key as an ID number. There are no special nodes, and there’s no single point of failure. The project supports Linux, macOS, Windows, Android, iOS, and web apps.
Veilid can talk over UDP and TCP, and connections are authenticated, timestamped, strongly end-to-end encrypted, and digitally signed to prevent eavesdropping, tampering, and impersonation. The cryptography involved has been dubbed VLD0, and uses established algorithms since the project didn’t want to risk introducing weaknesses from “rolling its own,” Rioux said.
This means XChaCha20-Poly1305 for encryption, Elliptic curve25519 for public-private-key authentication and signing, x25519 for DH key exchange, BLAKE3 for cryptographic hashing, and Argon2 for password hash generation. These could be switched out for stronger mechanisms if necessary in future.
Files written to local storage by Veilid are fully encrypted, and encrypted table store APIs are available for developers. Keys for encrypting device data can be password protected.
“The system means there’s no IP address, no tracking, no data collection, and no tracking – that’s the biggest way that people are monetizing your internet use,” Bowden said.
“Billionaires are trying to monetize those connections, and a lot of people are falling for that. We have to make sure this is available,” Bowden continued. The hope is that applications will include Veilid and use it to communicate, so that users can benefit from the network without knowing all the above technical stuff: it should just work for them.
To demonstrate the capabilities of the system, the team built a Veilid-based secure instant-messaging app along the lines of Signal called VeilidChat, using the Flutter framework. Many more apps are needed.
If it takes off in a big way, Veilid could put a big hole in the surveillance capitalism economy. It’s been tried before with mixed or poor results, though the Cult has a reputation for getting stuff done right. ®
More information can be found here: https://veilid.com/framework
I read it, haven’t tested it - commentary below.
Before I go into commentary, I will summarize: my background is from I2P - I helped build bits and pieces of that network a decade ago. As far as I can tell, Veilid deals in concepts that are considerably similar to I2P. If the makers have implemented things well, it could be a capable tool for many occasions. :) My own interest in recent years has shifted towards things like Briar. With that project, there is less common ground. Veilid is when you use public infrastructure to communicate securely, with anonymity. Briar is when you bring your own infrastructure.
- Networking
Looks like I2P, but I2P is coded in Java only. Veilid seems to have newer and more diverse languages (more capability, but likely more maintenance needs in future). I2P has a lot of legacy attached by now, and is not known for achieving great performance. A superficial reading of the network protocol doesn’t enable me to tell if Veilid will do better - I can only tell that they have thought of the same problems and found their own solutions. I would hope that when measured in a realistic situation, Veilid would exceed the performance of I2P. How to find out? By trying, in masses and droves…
- Cryptography
Impressive list of ciphers. Times have changed, I’m not qualified to say anything about any of them. It leaves the appearance that these people know what they are doing, and are familiar with recent developments in cryptography. They also seem to know that times will change (“Veilid has ensured that upgrading to newer cryptosystems is streamlined and minimally invasive to app developers, and handled transparently at the node level.”), which is good. Keeping local storage encrypted is an improvement over I2P - last time I worked with I2P, an I2P router required external protection (e.g. Linux disk encryption) against seizing the hardware. With mobile devices ever-present everywhere, storage encryption is a reasonable addition. I notice that the BlockStore functionality is not implemented yet. If they intend to get it working, storage encryption is a must, of course.
- RPC (remote procedure calls)
Their choice of a procedure call system is unfamiliar to me, but I read about it. I didn’t find anything to complain about.
- DHT (distributed hash table)
Looks somewhat like I2P.
- Private routing
Looks very much like I2P.
Thanks for writing this comparison, very helpful.
This reminds me about how network traffic worked in a book called “The Diamond Age” by Neal Stephenson (author of Cryptonomicon, and Snow Crash). In the book they described every device or application being a node and packets were routed through random nodes until they were pieced back together at their destination. That there was no central routing in these cases. It was a plot point because it’s noted how difficult it is to track messages in this kind of networking. I’m not sure I’m remembering it correctly but it’s a neat idea.
Cool but let me know when it’s downloadable. I know it’s coming soon, but I’d rather not promote vaporware until it’s usable.
It is out, the repository is linked in the article. Has installation instructions and a demo app too.
https://gitlab.com/veilid/veilidchat
Anyone else getting a 404 when trying to use the link from the article?
Ah nice, thanks for that!
I tried, and that GitLab page requires logging in. I don’t have an account, so I can’t comment more.
Strange, it is working here without an account
Really looking forward to seeing this packaged in Guix
I’ve built and run it with minimal fuss, but am trying to find a good small app to really wrap my head around how to work in a wildly decentralized space. Anyone got a good idea for a particularly useful app with a solarpunk lean? I was thinking of something like local mutual aid, but am open to all kinds of wild ideas.
I worry that systems like this will make it impossible to boot trolls and other bad actors
You mean people with opinions that don’t align with your own?
based
