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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
I think websockets should be sufficient for a proof-of-concept. I never looked into e2e encryption but a found this libsignal typescript impl. through the signal wikipedia page: https://github.com/privacyresearchgroup/libsignal-protocol-typescript
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