What is the El Tor High Capacity Tor Network?

El Tor aims to enhance the Tor network with high-bandwidth capabilities, powered by the Bitcoin Lightning Network, providing greater decentralisation and security. Users can host Tor relays and earn Satoshis, with Bolt12 offers managing payments. Inspired by the need for a private internet and efficient Lightning node communication, El Tor integrates a Lightning-based payment system and relay configurations, effectively. Despite challenges like understanding Tor’s architecture and learning C, the project has succeeded in creating a monetized relay system. Future plans include expanding the Directory Server, launching a testnet, and packaging for platforms like Start9 and Umbrel, aiming to improve internet privacy and decentralisation.

A High-Bandwidth Tor Network Powered by Bolt12 Lightning Micropayments?

El Tor is an early implementation of a high-bandwidth fork of the Tor network, enhanced by the Bitcoin Lightning Network to provide a more decentralised and secure platform for anonymous internet usage. El Tor allows users to run their own Tor relays, offering monetary incentives through Lightning Network micropayments. This system leverages Bolt12 offers for payments, ensuring that relays earn Satoshis (Sats) for sharing their internet bandwidth. Users can choose different relay types, such as entry guard, middle relay, or exit relay, and set their rates for bandwidth usage.

The inspiration for El Tor stemmed from the need for a more private internet, and more efficient communication between Lightning nodes. By integrating the Bitcoin Lightning Network, El Tor aims to enhance the decentralisation and security of the Tor network. The developers created a configuration file specifying the type of relay and payment details, using Bolt12 offers for payments. The Phoenixd server handles payments and liquidity, ensuring all relays in the circuit are compensated before establishing a connection.

According to the developers, building El Tor presented several challenges, including understanding Tor’s “circuit build” concept and ensuring all relays in a circuit were paid before a connection was established. The project also required the developers to learn the C programming language. Despite these challenges, El Tor successfully created a system where users can earn money by hosting Tor relays, providing a more secure, faster, higher-throughput, and decentralised network incentivised by Bitcoin Lightning micropayments.

Looking forward, the El Tor project plans to build out the Directory Server to include Bolt12 offers and rates, launch a proper testnet, and package the solution for platforms like Start9 and Umbrel. By doing so, El Tor aims to further enhance internet privacy and incentivise participation in the Tor network, making the internet more secure and decentralised for all users.

An Overview of the Tor Network 

The Tor network, rooted in the concept of onion routing developed by U.S. Naval Research Laboratory employees in the mid-1990s, emerged to protect American intelligence communications online. The alpha version of Tor, initially called The Onion Routing project, was launched in 2002 by Paul Syverson, Roger Dingledine, and Nick Mathewson, with its first public release following in 2003. In 2004, the Naval Research Laboratory released the code under a free software licence, and the Electronic Frontier Foundation (EFF) began funding further development. By 2006, The Tor Project was established as a nonprofit organisation, continuing to refine and expand the network.

Tor is widely used for a variety of purposes, enabling anonymous internet browsing, instant messaging, and accessing services without revealing user identities or locations. Its primary users include activists, journalists, and individuals in regions where there is a risk of censorship and/or surveillance. Tor’s anonymous communication capabilities also support whistleblowers and human rights organisations by providing a secure means to share sensitive information. Additionally, the network hosts onion services, which are websites accessible only through Tor, providing enhanced privacy for both users and service providers.

Despite its benefits, Tor faces several challenges, including potential attacks and vulnerabilities that compromise user anonymity. Over the years, various weaknesses have been exploited, such as traffic correlation attacks that analyse patterns to trace users. The network has also been targeted by law enforcement and intelligence agencies, attempting to subvert its privacy protections. Instances of exit node eavesdropping have raised concerns about data interception, highlighting the need for constant vigilance and security enhancements within the network.

Tor’s association with illicit activities, such as drug trafficking and illegal marketplaces, has brought it under scrutiny and criticism. This reputation complicates its advocacy as a tool for privacy and freedom of expression. Nonetheless, The Tor Project remains committed to improving the network’s security and usability, addressing technical challenges, recently adding RandomX-based Proof of Work (PoW) to mitigate DDOS attacks, and promoting its legitimate use cases. Continuous research and development efforts aim to mitigate risks and enhance the resilience of the Tor network, ensuring it remains a vital resource for protecting online privacy and anonymity.

How Does Lightning Network & Bolt12 Help to Change the Incentives for Running a Tor Node via EL Tor?

The Lightning Network and Bolt12 significantly change the incentives for running a Tor node through El Tor by introducing a robust and dynamic micropayment system. By leveraging the Bitcoin Lightning Network, El Tor allows Tor node operators to earn small amounts of Bitcoin (Sats) for providing bandwidth. This creates a direct financial incentive for individuals to contribute to the network, potentially increasing the number of nodes and improving the overall bandwidth and reliability of the Tor network. With Bolt12, these payments are streamlined and made more efficient, facilitating easier and more secure transactions between users and node operators.

Incorporating the Lightning Network into El Tor enhances the decentralisation and security of the Tor network. Traditional Tor nodes operate on a volunteer basis, which can limit the network’s capacity and resilience. By offering a monetary reward for node operators, El Tor can attract a wider range of participants, including those who might not otherwise contribute. This increased participation helps to distribute the network load more evenly, reducing the risk of bottlenecks and single points of failure. Furthermore, the use of Bolt12 ensures that payments are encrypted and routed through the network securely, maintaining the privacy and anonymity that Tor users expect.

The introduction of Lightning Network micropayments and Bolt12 also addresses some of the economic challenges associated with running a Tor node. Operating a node requires resources such as electricity and internet bandwidth, which can be costly over time. By compensating node operators with Bitcoin, El Tor helps to offset these expenses, making it more feasible for individuals and organisations to run nodes sustainably. This financial model can lead to a more robust and resilient Tor network, as operators have a clear incentive to maintain their nodes and ensure they are running efficiently.

Additionally, the integration of the Lightning Network and Bolt12 into El Tor aligns with a desire for  financial privacy and security within the cryptocurrency space. Users who value privacy and anonymity are likely to appreciate the seamless integration of these technologies into the Tor network. By facilitating private, decentralised payments, El Tor not only strengthens the Tor network but also promotes the adoption and use of Bitcoin and the Lightning Network. This symbiotic relationship benefits both communities, sparking innovation and enhancing the overall ecosystem of privacy-focused technologies.

The post What is the El Tor High Capacity Tor Network? appeared first on Bitfinex blog.