matrix-org / matrix-org/matrix-spec
Restricted join rules are incompatible with E2EE history
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A-E2EE
feature
- Dominant language
- HTML
- Stars
- 330
- Forks
- 150
- Avg merge
- 2h 21m
- Merged PRs (30d)
- 3
Description
If you join an E2EE room with restricted join rules but shared history visibility, there is no way to get keys to view the history.
See https://github.com/vector-im/element-meta/issues/646 for much more detail on what a problem this is.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with the linked element-meta issue 646 for the detailed problem statement, then review the Matrix specification sections covering restricted join rules, shared history visibility, and E2EE key access. Done requires a decided protocol-level resolution that lets eligible members obtain keys for shared history; this issue names no files or tests.
Written by the indexing model from the issue text.
Assessment
- Domain
- cryptography, security
- Issue type
- Bug
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100