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> Signal/RedPhone did invent its own crypto (the ratchet), didn't they? IIRC, they didn't invent any crypto primitives (e.g. cyphers).
by tivert 8y ago
> Signal/RedPhone did invent its own crypto (the ratchet), didn't they?
IIRC, they didn't invent any crypto primitives (e.g. cyphers).
- Tomte 8y agoSure, but the primitives are pretty boring, anyway. Few people try to invent those. Many more try to invent new constructions on top of the primitives. That's where things go wrong, in practice. (I fully trust in OWS here, but "don't invent crypto" is an unsuitable argument in a Signal-vs-Telegram discussion)
- tivert 8y ago> Many more try to invent new constructions on top of the primitives. That's where things go wrong, in practice. Things go wronger when non-cryptographers try to invent their own primitives, and that's what the saying "don't invent your own crypto" was invented to warn against.