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About this paper
Oscar King, Geoffrey Goodell
A decentralized digital token architecture for public transport, based on the Distributed Digital Identity (DigID) protocol, demonstrates technical feasibility for large-scale urban networks like Transport for London. This system achieves enhanced user privacy by preventing trip linking and identity profiling, offering competitive performance with proposed architectural optimizations.
Key insights
- Blind signatures are effective in establishing 'privacy by design' by ensuring unlinkability of transactions and giving users control over data linkages.
- Initial performance showed a median latency of 663 milliseconds for system entry, which, while exceeding the 500ms target, is deemed a useful first step.
- Computational overhead for blind signature generation itself is minimal (1.31ms), with larger request bodies and network interactions being the primary latency contributors.
Summary by alphaXiv.
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