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Subject: Re: [Bitcoin-development] Proposal to address Bitcoin malware
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> Bitcoin Authenticator is a desktop app+mobile app pair. It pairs with =
your phone over wifi, cloud push, maybe Bluetooth as well. I forget =
exactly.=20
>=20
> It's done in the same way as Lighthouse, so it runs Win/Mac/Linux on =
desktop and Android on mobile.
>=20
> It could be adapted to use BitGo as a third party key holder with SMS =
authenticator relatively easily, I think. We did the bulk of all the =
needed work last year as part of the bitcoinj multisig work. Then you'd =
have a server involved, but not a web app.

I really like the concept of Bitcoin Authenticator and think it=E2=80=99s =
exactly what I was describing (without a third-party).

I think it=E2=80=99s a bit confusing when they describe Bitcoin =
Authenticator as 2FA.  I think it may be more accurate to describe it as =
out of band transaction verification/signing or dual transaction =
signing.  Regardless, it=E2=80=99s very exciting to see others are =
thinking about this too.

Brian Erdelyi=