Looking at the github demo (https://github.com/google/capillary https://github.com/google/capillary), it seems to me that it they may have decided to use RSA an

Looking at the github demo (https://github.com/google/capillary https://github.com/google/capillary), it seems to me that it they may have decided to use RSA and ECDSA due to limitations of the Android Keystore. I'm no Android developer, though, so I may be misinterpreting something.