WICG / WICG/webpackage

Can SXG be used to track users?

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Dominant language
Go
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Description

Scenario is the following:

  • User A goes to site S and gets a SXG
  • User A shares the SXG to user B
  • User B loads the SXG
  • Site S learns that there is a connection between user A and user B.

Overall, SXG seems to ask publishers to use SXG so that content is not user-specific.
But there is currently no way for users to ensure that this is the case.

One possible solution is some kind of SXG transparency, as added https://github.com/WICG/webpackage/pull/381.
It is not clear whether that will scale though.

Another possibility is to get such a proof from the server itself.
A specific credential less request from user B to the signed URL or to an URL generated from it by the client could do the trick. Liveness check could also piggy back on such a request.

Contributor guide

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reviewing the scenario and the linked transparency pull request, https://github.com/WICG/webpackage/pull/381. The issue presents transparency and server-issued proof as possible directions but does not identify an implementation entry point, tests, or agreed acceptance criteria.

Written by the indexing model from the issue text.

Assessment

Domain
security, web-dev
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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