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I am writing a project in which I want to implement a App-Lock using asynchronous encryption. The first app on one device is the key, and the second app on the second device is the lock. These two applications must exchange a public key, and if everything went well, then the application – the lock opens (the screen lights up green) after 5 seconds, for example, automatically closes (the screen lights up red), if not successful, then the lock remains closed.
I thought that I could implement this using the NFC, but as I seem to understand, this is no longer possible, because the modern NFC no longer supports p2p data transfer via Android Beam.
Which technology suits me best for implementing data transfer between two devices?
submitted by /u/EdMishch
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