Date: Mon, 28 Jun 2021 15:28:44 +0000
To: "raymo@riseup.net" <raymo@riseup.net>
From: ZmnSCPxj <ZmnSCPxj@protonmail.com>
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Cc: Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>
Subject: Re: [bitcoin-dev] Boost Bitcoin circulation,
	Million Transactions Per Second with stronger privacy
Precedence: list

Good morning Raymo,

> Hi ZmnSCPxj,
>
> Why you get the signal =E2=80=9Ctrust the Gazin wallet=E2=80=9D?
> Sabu is a protocol and the Gazin wallet will be an implementation of
> that protocol. We will implement it in react-native language to support
> both Android and iPhone. Of course it will be open source and GPL3.
> Here is the repository and yet is empty :)
> https://github.com/raymaot/Gazin
>
> I wonder why you do not look carefully into the proposal! IMHO the Sabu
> will be far better than Lightning.
> Can=E2=80=99t you see the fact that in Sabu you do not need open and clos=
e
> channels ever? Can you imagine only this feature how dramatically
> decrease the transactions cost and how increase the distribution of
> nodes and improve privacy level? it makes every mobile wallet act like a
> lightning network.
> Did you note the fact that in Sabu protocol there is no routing? And the
> only people knew about a transaction are issuer and creditor? No one
> else won=E2=80=99t be aware of transactions and million transactions per =
second
> can be sent and received and repeal dynamically without any footprint on
> any DLT?
>
> The English is not my mother language and probably my paper is not a
> smooth and easy to read paper, but these are not good excuse to not even
> reading a technical paper carefully and before understanding it or at
> least trying to understanding it start to complaining.


What prevents the creditor from signing a transaction that is neither a val=
id MT nor a GT?

Nothing.

In Lightning, sure one side can sign a transaction that is not a valid comm=
itment transaction, but good luck getting the other side to *also* sign the=
 transaction; it will not.
Thus, you need n-of-n.

1-of-1 is simply not secure, full stop, you need to redesign the whole thin=
g to use *at least* 2-of-2.
At which point you will have reinvented Lightning.

Otherwise, you are simply trusting that the wallet is implemented correctly=
, and in particular, that any creditor will not simply insert code in your =
open-source software to sign invalid transactions.

With a 1-of-1, any invalid-in-Sabu transaction can still be valid in the Bi=
tcoin blockchain layer, thus the scheme is simply insecure.

Features are meaningless without this kind of basic trust-minimization secu=
rity.

Regards,
ZmnSCPxj