matrix.org/static/jira/browse/SPEC-271

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---
summary: Messages for E2E to notify about new devices
---
created: 2015-11-17 13:39:11.0
creator: markjh
description: |-
When a user adds a new device it should send a message to the other devices that the user owns so that they can cross-sign the public key of the new device.
This should do some kind of crypto based off of a shared secret, e.g. an N digit code, to authenticate the new device.
Once the new device's key has been cross-signed by the old device key, then a message should be sent to all devices that the user is chatting with to add the new device to the conversation.
id: '12112'
key: SPEC-271
number: '271'
priority: '3'
project: '10001'
reporter: markjh
resolution: '1'
resolutiondate: 2016-09-08 16:53:03.0
status: '5'
type: '2'
updated: 2016-09-08 16:53:04.0
votes: '0'
watches: '3'
workflowId: '12215'
---
actions:
- author: richvdh
body: |-
We now have messages to notify about new devices (although, as with the rest of the stuff we've thrown in for E2E, they are woefully underspecced), so this is done.
Cross-signing is a *whole* other kettle of fish.
created: 2016-09-08 16:53:04.0
id: '13117'
issue: '12112'
type: comment
updateauthor: richvdh
updated: 2016-09-08 16:53:04.0