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Signal forks can have unexpected behaviours like retaining deleted messages and also they don’t get updated at the same rate that Signal get updated.
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Every couple of years I hear a story about hackers disturbing signal with backdoors, which would be impossible or very hard to be done If they blocked third party clients. (Ex: 1)
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The amount of people who use third party Signal clients are very few anyway.
I saw what WhatsApp did to forbid modification of it’s app which works in stopping a lot of distributions, why doesn’t Signal do the same?
I mean having a list of allowed clients.
As I said in my post, WhatsApp already enforce forbidding third party client and it seems to work well.
I don’t see why wouldn’t Signal improve the security of their users by implementing this, while upsetting the very few users who use third party clients.