Expand description
This crate implements the core protocol logic for the Distributed Aggregation Protocol
(DAP) standard under development in the
PPM working group of the IETF. See VdafConfig for a listing of supported
VDAFs.
Daphne implements draft-ietf-ppm-dap-02.
Daphne does not provide the complete, end-to-end functionality of any party in the protocol.
Instead, it defines traits for the functionalities that a concrete instantiation of the
protocol is required to implement. For example, the daphne_worker crate implements a backend
for the DAP Leader and Helper. See the crate::roles module for details.
Daphne is not yet feature complete. Known issues include:
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The collect sub-protocol has not yet been fully implemented. In particular, Daphne Aggreators do not check properly if batch intervals overlap across collect requests. Note that this feature is privacy-critical and implementation is planned. See https://github.com/cloudflare/daphne/issues/45 for details.
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Daphne is not compatible with DAP tasks whose maximum batch lifetime is longer than one.
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Aborts are not handled precisely as specified. In particular, some fields in the “Problem Details” document are omitted.
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Daphne does not implement a complete DAP Client or Collector. However, methods are provided on
VdafConfigfor producing reports and consuming aggregate results.