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Evgeny Poberezkin 2019-12-24 20:03:11 +00:00
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@ -27,6 +27,13 @@ The problems of existing chat solutions this system intends to solve:
- prove sent/received time/delivery order - with the solution below only timestamp of another party can be proven, not the actual time.
## Other ideas
- [OTR messaging](https://en.wikipedia.org/wiki/Off-the-Record_Messaging) - below defines verifiable messaging, there is also value in supporting off-the-record messaging. Not in prototype
- Group support - 1) separately encrypt for each recepient or 2) encrypt once per group using distributed symmetric key or 3) ... ? Probably encrypt separately, at least initially.
- Multiple user devices - 1) known to servers or 2) known to senders? Probably known to senders. Not in prototype.
## Solution
- No phone numbers, user names and no DNS are used to identify to users (chat servers may choose to be accessible via DNS, but it is not required)