bof-request.txt

# Name: Privacy-Preserving Measurement

## Description 

There are many situations in which it is desirable to take
measurements of data which people consider sensitive. For instance,
one might want to measure web sites that do not render properly
or exposure to some disease. In these cases, the entity taking the
measurement is not interested in people's individual responses but
rather in aggregated data (e.g., how many users had errors on site X).
Conventional methods require collecting individual measurements and then
aggregating them, thus representing a threat to user privacy and
rendering many such measurements difficult and impractical.

New cryptographic techniques such as Prio and, more recently, a
protocol for privacy preserving heavy hitters, address this gap by
splitting up measurements between multiple servers which can jointly
compute the aggregate value without either server learning the value
of individual responses. The Privacy Preserving Measurement (PPM) work
will standardize a protocol for deployment of these techniques on the
Internet. This protocol will include mechanisms for:

* Client submission of individual reports, including proofs of validity.
* Server verification of validity proofs
* Server computation of aggregate values and collection of results to
* Reporting of aggregate results to the entity taking the measurement

This is a WG-forming BOF for a WG to standardize a PPM protocol.  The
PPM WG will not itself define cryptographic algorithms for PPM but
will instead use algorithms defined by the CFRG.



## Required Details
- Status: WG Forming
- Responsible AD: Roman Danyliw, Ben Kaduk
- BOF proponents: Eric Rescorla <ekr@rtfm.com>, Chris Wood <caw@heapingbits.net>
- BOF chairs: TBD
- Number of people expected to attend: 100
- Length of session (1 or 2 hours): 2 hours
- Conflicts (whole Areas and/or WGs)
   - Chair Conflicts: TBD
   - Technology Overlap: TLS, PEARG, CFRG
   - Key Participant Conflict: Chris Wood, Eric Rescorla, Christopher Patton,
                               Martin Thomson, Richard Barnes
## Agenda
   - Presentation of use cases [15]
   - Overview of solution draft [30]
   - Charter discussion [30]
   - BoF questions [Remainder]

## Links to the mailing list, draft charter if any, relevant Internet-Drafts, etc.
   - Mailing List: ppm@ietf.org, https://www.ietf.org/mailman/listinfo/ppm
   - Draft charter: https://github.com/abetterinternet/ppm-specification/blob/main/charter.md
   - Relevant drafts:
      - https://abetterinternet.github.io/ppm-specification/draft-pda-protocol.html