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WhatsApp already degraded their crypto to achieve their own political ends (they restrict forwarding in order to slow down the propagation of "rumors", which in
by nvm0n2 3y ago
WhatsApp already degraded their crypto to achieve their own political ends (they restrict forwarding in order to slow down the propagation of "rumors", which in a textbook e2e crypto scheme wouldn't be possible) [1]. So "it would be weaker" isn't a good argument, they already accepted it.
The other objections are all Type 1 (it would be inconvenient).
[1] https://faq.whatsapp.com/1053543185312573 https://faq.whatsapp.com/1053543185312573
- andrewaylett 3y agoImpossible to enforce, maybe. Include a counter on each message, incremented by one locally if forwarded. Completely insecure against malicious clients, but the threat model doesn't feature malicious clients so it works well enough.