1. Introduction
This document outlines the technical specification for a decentralized bridge between the WebFinger protocol and the AT Protocol's Decentralized Identifiers (DIDs). The primary goal is to provide a seamless and secure method for mapping human-readable WebFinger addresses to cryptographic DIDs, enhancing interoperability between the two ecosystems.
2. System Architecture
The bridge will be implemented as a distributed network of nodes, each responsible for storing and resolving a subset of WebFinger-to-DID mappings. This decentralized approach eliminates single points of failure and enhances censorship resistance.
3. Core Components
WebFinger-to-DID Mapping: The core of the bridge is a distributed hash table (DHT) based on the Kademlia algorithm. The DHT will store key-value pairs where the key is the WebFinger address and the value is the corresponding AT Protocol DID.
Node Discovery: Nodes will use a bootstrap mechanism to discover other nodes in the network. A set of well-known bootstrap nodes will be provided to facilitate initial entry into the network.
Data Replication: To ensure data availability and resilience, each mapping will be replicated across multiple nodes in the DHT. The replication factor will be configurable.
Systemd Service: The bridge will be packaged as a systemd service for easy deployment and management. The service will be a single Python script that implements the node's functionality.
4. Proof-of-Concept Implementation
A proof-of-concept (PoC) will be developed in Python to validate the design. The PoC will include:
A basic implementation of a Kademlia DHT for storing and retrieving mappings. A simple command-line interface (CLI) for interacting with the node. Filesystem-based storage for the DHT.
5. Future Work
Security Enhancements: The security of the bridge can be further enhanced by incorporating mechanisms for verifying the authenticity and integrity of mappings. Scalability Improvements: The scalability of the bridge can be improved by optimizing the DHT implementation and exploring alternative data storage solutions. Integration with other protocols: The bridge can be extended to support other decentralized identity protocols.