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Users should be able to read their existing history rapidly when logging in on a new device. #757

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BillCarsonFr opened this issue Oct 14, 2022 · 1 comment
Open
2 of 4 tasks

Users should be able to read their existing history rapidly when logging in on a new device. #757

BillCarsonFr opened this issue Oct 14, 2022 · 1 comment
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A-E2EE App: Android App: iOS App: web O-Frequent Affects or can be seen by most users regularly or impacts most users' first experience S-Critical Prevents work, causes data loss and/or has no workaround T-Enhancement T-Epic Issue is at Epic level Team: Crypto X-Needs-Rust This issue needs a Rust SDK change. It must have a link to a Rust SDK issue Z-Chronic

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@BillCarsonFr
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BillCarsonFr commented Oct 14, 2022 •
edited by richvdh
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Large key backups take forever to restore (or fail entirely); should restore incrementally instead

Web
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  1. Loading megolm keys from backup (be it online or offline) has become incredibly slow. element-web#19778
    A-E2EE A-E2EE-Key-Backup A-Performance O-Uncommon S-Major T-Defect Z-Legacy-Crypto
  2. Restore keybackup after verification will freeze E2EE for big backups element-web#23359
    A-E2EE-Key-Backup O-Occasional S-Major T-Defect
  3. Key backup restore API lacks sensible pagination vector-im/element-meta#2176
    A-E2EE A-E2EE-Key-Backup

Rust
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  1. Consider using KeyBackup as a vector to get keys as part of the Gossip Machine matrix-org/matrix-rust-sdk#1267
    encryption enhancement

IOS: Similar issue

Android:
Better but still some issues, incremental backup calls done after each syncs so can take some time if not a lot to sync. And it's not working that well for large gappy syncs, in this case the crypto service is catching up on a lot of to_devices that will trigger upload of the newly received key and looks like it's blocking the backup from incrementally downloading keys

How to test:

  • Login an existing account with a big key backup.
  • Open e2ee rooms, history should decrypt quickly (seconds)
@karlabbott karlabbott added O-Frequent Affects or can be seen by most users regularly or impacts most users' first experience T-Enhancement labels Oct 26, 2022
@BillCarsonFr BillCarsonFr mentioned this issue Dec 9, 2022
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@kittykat kittykat added the S-Critical Prevents work, causes data loss and/or has no workaround label Jan 19, 2023
@richvdh richvdh added X-Needs-Rust This issue needs a Rust SDK change. It must have a link to a Rust SDK issue and removed rust-sdk labels Mar 15, 2023
This was referenced Mar 15, 2023
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@richvdh
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richvdh commented Mar 1, 2024

requires a fix to element-hq/element-web#27009 ?

@BillCarsonFr BillCarsonFr mentioned this issue Jun 18, 2024
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A-E2EE App: Android App: iOS App: web O-Frequent Affects or can be seen by most users regularly or impacts most users' first experience S-Critical Prevents work, causes data loss and/or has no workaround T-Enhancement T-Epic Issue is at Epic level Team: Crypto X-Needs-Rust This issue needs a Rust SDK change. It must have a link to a Rust SDK issue Z-Chronic
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@kittykat @richvdh @BillCarsonFr @karlabbott