Signal has been growing in popularity in Europe, the US and elsewhere as an alternative to WhatsApp.
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Signal, the security-focused messaging app, has announced a set of features aimed at enhancing privacy.
Encrypted messaging app Signal appeared to no longer be working in China without the use of a virtual private network on Tuesday morning, users in the country said.
The number of new users installing messaging app Signal every day is on track to cross the one million mark, putting it closer to levels seen by larger rival WhatsApp.