We've got RSA 2048 keys on iOS, Android and a separate smartcard USB key, and do 2-factor login and transaction authorization with a simple tap in an app + optional direct login without a password + trusted messaging. Available as an app or an app SDK.
What I'm wondering is whether Twitter is actually protecting the private keys? That's the real tricky part.
We've got RSA 2048 keys on iOS, Android and a separate smartcard USB key, and do 2-factor login and transaction authorization with a simple tap in an app + optional direct login without a password + trusted messaging. Available as an app or an app SDK.
What I'm wondering is whether Twitter is actually protecting the private keys? That's the real tricky part.