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Re: Device Discovery and Telehash

From: Tibor Pardi <tibor@zovolt.com>
Date: Mon, 8 Feb 2016 16:29:27 +0000
Message-ID: <CAMJB5duP798YHu_t7WZw+jTPwkwEix0eJzWEeXi6Mt9egu+8pQ@mail.gmail.com>
To: Drasko DRASKOVIC <drasko.draskovic@gmail.com>, Dave Raggett <dsr@w3.org>, public-wot-ig@w3.org
Hi Drasko

We have started to implement a P2P device discovery module in the
https://github.com/w3c/web-of-things-framework project. Our P2P discovery
module uses the a Kademlia DHT table, the implementation and concept is
very similar to Telehash. I investigated Telehash as well, I understand
IBM's Adept (before it was abandoned) selected Telehash, but there are very
little Nodejs support for Telehash which I could integrate at the time. Our
underlying or ECDSA modules are based on Bitcoin crypto as well and use a
Bitcoin crypto library.

Device discovery is one of the main area which need to be addressed, and an
open source, decentralised, P2P device discovery mechanism that operates
without using a proprietary cloud or client/server module is one possible
way to manage the topic. In fact I believe P2P is the best possible
solution for device discovery. P2P by definition addresses requirements
such as scalability and high availability without the need to spend a
fortune on load balancing and cluster infrastructure.

There is a brief readme to explain our P2P device discovery module at

Please note I am updating the P2P module at the DEV branch with optimizing
the module, providing tests for ECDSA and ECDH and using TCP/IP by default
instead of UDP (several users reported that their mobile operators blocks
UDP traffic).


On Mon, Feb 8, 2016 at 3:46 PM, Drasko DRASKOVIC <drasko.draskovic@gmail.com
> wrote:

> Hi Dave,
> I was wondering what is the IoT framework approach towards device
> discovery?
> Iotivity and AllJoyn approach this problem, but are closed standards.
> Do we have open technologies that we can use in decentralized manner
> for WOT Framework?
> One new interesting p2p protocol is Telehash: http://telehash.org/,
> specified by Jeremie Miller (XMPP creator - and we all know how much
> industry loves XMPP for NAT traversals ;)). This protocol is based on
> Bitcoin Blockchain for encryption (and some king od DNS resolution
> (https://github.com/telehash/blockname), and I guess it can be used
> for decentralized device discovery.
> BR,
> Drasko
Received on Monday, 8 February 2016 16:30:02 UTC

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