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From: Agustin Cruz <agustin.cruz@gmail.com>
Date: Sat, 8 Mar 2025 21:53:58 -0300
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Message-ID: <CAJDmzYxAv8ahPOoTVryqy6oE8nUX0+49BHHhO==M1HpZCuMNbQ@mail.gmail.com>
Subject: Re: [bitcoindev] Re: Proposal for Quantum-Resistant Address Migration
 Protocol (QRAMP) BIP
To: =?UTF-8?Q?Michal_Koles=C3=A1r?= <michal@zeleny-ctverec.cz>
Cc: Bitcoin Development Mailing List <bitcoindev@googlegroups.com>
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Hi Michal,

I completely understand your point of view. However, the concern with QRAMP
isn=E2=80=99t about arbitrarily punishing users or confiscating assets with=
out
reason. Rather, it=E2=80=99s about mitigating a very real, systemic risk. I=
f a
significant amount of funds remains in legacy addresses and a quantum
breakthrough occurs, the attack wouldn=E2=80=99t be a one-off incident targ=
eting a
few unlucky individuals. Instead, it could compromise the security of the
entire network, affecting countless users and shaking confidence in Bitcoin
as a whole.

The enforcement aspect of QRAMP is intended as a last-resort safety
mechanism after a long and well-communicated migration period. It=E2=80=99s
designed to ensure that by the time any quantum-capable adversary comes
along, almost everyone=E2=80=99s funds are protected by quantum-resistant
cryptography. The goal is to preempt a scenario where the vulnerability
becomes so widespread that a malicious actor could trigger a massive,
destabilizing reallocation of wealth.

The enforced migration is less about penalizing users and more about
preserving the long-term security and stability of the network for everyone=
.

Best regards,
Agustin

El s=C3=A1b, 8 de mar de 2025, 9:22=E2=80=AFp. m., Michal Koles=C3=A1r <
michal@zeleny-ctverec.cz> escribi=C3=B3:

> Dear Agustin,
>
> enforcement in general doesn=E2=80=99t seem like a good choice to me. If =
I were to
> compare it to the real world, it=E2=80=99s as if people had money or jewe=
lry in
> bank vaults that were unbreakable at the time they were stored. After a
> certain period, it=E2=80=99s discovered that these vaults could be breach=
ed, and
> we=E2=80=99d tell everyone they have to buy new vaults and move their dia=
monds,
> gold, and banknotes into them. If they don=E2=80=99t do it, everything in=
 their old
> vaults would be confiscated and destroyed. Surely, it=E2=80=99s normal th=
at people
> would naturally buy new vaults (or move to safer ones) if they=E2=80=99re=
 informed
> well in advance and loudly enough about the outdated vaults. And if they
> decide not to replace them, someone will eventually break in sooner or
> later and become the new owner of their "wealth." That=E2=80=99s how it w=
orks in
> the real world, after all. Yes, perhaps if someone steals a large amount =
of
> Bitcoin en masse, it might temporarily lower its value. But that=E2=80=99=
s fine=E2=80=94it
> would just redistribute old, lost, or unused Bitcoins into new ownership,
> where someone would start using them. It=E2=80=99s like finding a lost tr=
easure
> from the past at the bottom of the ocean.
>
> Best regards,
> Michal
>
> On Wednesday, February 12, 2025 at 1:10:17=E2=80=AFAM UTC+1 Agustin Cruz =
wrote:
>
> Dear Bitcoin Developers,
>
> I am writing to share my proposal for a new Bitcoin Improvement Proposal
> (BIP) titled *Quantum-Resistant Address Migration Protocol (QRAMP)*. The
> goal of this proposal is to safeguard Bitcoin against potential future
> quantum attacks by enforcing a mandatory migration period for funds held =
in
> legacy Bitcoin addresses (secured by ECDSA) to quantum-resistant addresse=
s.
>
> The proposal outlines:
>
>    - *Reducing Vulnerabilities:* Transitioning funds to quantum-resistant
>    schemes preemptively to eliminate the risk posed by quantum attacks on
>    exposed public keys.
>    - *Enforcing Timelines:* A hard migration deadline that forces timely
>    action, rather than relying on a gradual, voluntary migration that mig=
ht
>    leave many users at risk.
>    - *Balancing Risks:* Weighing the non-trivial risk of funds being
>    permanently locked against the potential catastrophic impact of a quan=
tum
>    attack on Bitcoin=E2=80=99s security.
>
> Additionally, the proposal addresses common criticisms such as the risk o=
f
> permanent fund loss, uncertain quantum timelines, and the potential for
> chain splits. It also details backwards compatibility measures,
> comprehensive security considerations, an extensive suite of test cases,
> and a reference implementation plan that includes script interpreter
> changes, wallet software updates, and network monitoring tools.
>
> For your convenience, I have published the full proposal on my GitHub
> repository. You can review it at the following link:
>
> Quantum-Resistant Address Migration Protocol (QRAMP) Proposal on GitHub
> <https://github.com/chucrut/bips/blob/master/bip-xxxxx.md>
>
> I welcome your feedback and suggestions and look forward to engaging in a
> constructive discussion on how best to enhance the security and resilienc=
e
> of the Bitcoin network in the quantum computing era.
>
> Thank you for your time and consideration.
>
> Best regards,
>
> Agustin Cruz
>
> --
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>

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<div dir=3D"auto"><p dir=3D"ltr">Hi Michal,</p>
<p dir=3D"ltr">I completely understand your point of view. However, the con=
cern with QRAMP isn=E2=80=99t about arbitrarily punishing users or confisca=
ting assets without reason. Rather, it=E2=80=99s about mitigating a very re=
al, systemic risk. If a significant amount of funds remains in legacy addre=
sses and a quantum breakthrough occurs, the attack wouldn=E2=80=99t be a on=
e-off incident targeting a few unlucky individuals. Instead, it could compr=
omise the security of the entire network, affecting countless users and sha=
king confidence in Bitcoin as a whole.</p>
<p dir=3D"ltr">The enforcement aspect of QRAMP is intended as a last-resort=
 safety mechanism after a long and well-communicated migration period. It=
=E2=80=99s designed to ensure that by the time any quantum-capable adversar=
y comes along, almost everyone=E2=80=99s funds are protected by quantum-res=
istant cryptography. The goal is to preempt a scenario where the vulnerabil=
ity becomes so widespread that a malicious actor could trigger a massive, d=
estabilizing reallocation of wealth.</p>
<p dir=3D"ltr">The enforced migration is less about penalizing users and mo=
re about preserving the long-term security and stability of the network for=
 everyone.</p>
<p dir=3D"ltr">Best regards,<br>
Agustin</p></div><br><div class=3D"gmail_quote gmail_quote_container"><div =
dir=3D"ltr" class=3D"gmail_attr">El s=C3=A1b, 8 de mar de 2025, 9:22=E2=80=
=AFp.=C2=A0m., Michal Koles=C3=A1r &lt;<a href=3D"mailto:michal@zeleny-ctve=
rec.cz">michal@zeleny-ctverec.cz</a>&gt; escribi=C3=B3:<br></div><blockquot=
e class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc sol=
id;padding-left:1ex"><div style=3D"color:black;background-color:transparent=
;font-family:sans-serif">Dear Agustin,</div><div style=3D"color:black;backg=
round-color:transparent;font-family:sans-serif"><br></div><div style=3D"col=
or:black;background-color:transparent;font-family:sans-serif">enforcement i=
n general doesn=E2=80=99t seem like a good choice to me. If I were to compa=
re it to the real world, it=E2=80=99s as if people had money or jewelry in =
bank vaults that were unbreakable at the time they were stored. After a cer=
tain period, it=E2=80=99s discovered that these vaults could be breached, a=
nd we=E2=80=99d tell everyone they have to buy new vaults and move their di=
amonds, gold, and banknotes into them. If they don=E2=80=99t do it, everyth=
ing in their old vaults would be confiscated and destroyed. Surely, it=E2=
=80=99s normal that people would naturally buy new vaults (or move to safer=
 ones) if they=E2=80=99re informed well in advance and loudly enough about =
the outdated vaults. And if they decide not to replace them, someone will e=
ventually break in sooner or later and become the new owner of their &quot;=
wealth.&quot; That=E2=80=99s how it works in the real world, after all. Yes=
, perhaps if someone steals a large amount of Bitcoin en masse, it might te=
mporarily lower its value. But that=E2=80=99s fine=E2=80=94it would just re=
distribute old, lost, or unused Bitcoins into new ownership, where someone =
would start using them. It=E2=80=99s like finding a lost treasure from the =
past at the bottom of the ocean.</div><div style=3D"color:black;background-=
color:transparent;font-family:sans-serif"><br></div><div style=3D"color:bla=
ck;background-color:transparent;font-family:sans-serif">Best regards,</div>=
<div style=3D"color:black;background-color:transparent;font-family:sans-ser=
if">Michal</div><br><div><div dir=3D"auto">On Wednesday, February 12, 2025 =
at 1:10:17=E2=80=AFAM UTC+1 Agustin Cruz wrote:<br></div><blockquote style=
=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding=
-left:1ex"><p style=3D"color:rgb(34,34,34);font-family:Arial,Helvetica,sans=
-serif;font-size:small">Dear Bitcoin Developers,</p><p style=3D"color:rgb(3=
4,34,34);font-family:Arial,Helvetica,sans-serif;font-size:small">I am writi=
ng to share my proposal for a new Bitcoin Improvement Proposal (BIP) titled=
=C2=A0<strong>Quantum-Resistant Address Migration Protocol (QRAMP)</strong>=
. The goal of this proposal is to safeguard Bitcoin against potential futur=
e quantum attacks by enforcing a mandatory migration period for funds held =
in legacy Bitcoin addresses (secured by ECDSA) to quantum-resistant address=
es.</p><p style=3D"color:rgb(34,34,34);font-family:Arial,Helvetica,sans-ser=
if;font-size:small">The proposal outlines:</p><ul style=3D"color:rgb(34,34,=
34);font-family:Arial,Helvetica,sans-serif;font-size:small"><li style=3D"ma=
rgin-left:15px"><strong>Reducing Vulnerabilities:</strong>=C2=A0Transitioni=
ng funds to quantum-resistant schemes preemptively to eliminate the risk po=
sed by quantum attacks on exposed public keys.</li><li style=3D"margin-left=
:15px"><strong>Enforcing Timelines:</strong>=C2=A0A hard migration deadline=
 that forces timely action, rather than relying on a gradual, voluntary mig=
ration that might leave many users at risk.</li><li style=3D"margin-left:15=
px"><strong>Balancing Risks:</strong>=C2=A0Weighing the non-trivial risk of=
 funds being permanently locked against the potential catastrophic impact o=
f a quantum attack on Bitcoin=E2=80=99s security.</li></ul><p style=3D"colo=
r:rgb(34,34,34);font-family:Arial,Helvetica,sans-serif;font-size:small">Add=
itionally, the proposal addresses common criticisms such as the risk of per=
manent fund loss, uncertain quantum timelines, and the potential for chain =
splits. It also details backwards compatibility measures, comprehensive sec=
urity considerations, an extensive suite of test cases, and a reference imp=
lementation plan that includes script interpreter changes, wallet software =
updates, and network monitoring tools.</p><p style=3D"color:rgb(34,34,34);f=
ont-family:Arial,Helvetica,sans-serif;font-size:small">For your convenience=
, I have published the full proposal on my GitHub repository. You can revie=
w it at the following link:</p><p style=3D"color:rgb(34,34,34);font-family:=
Arial,Helvetica,sans-serif;font-size:small"><a rel=3D"noopener nofollow nor=
eferrer" href=3D"https://github.com/chucrut/bips/blob/master/bip-xxxxx.md" =
style=3D"color:rgb(17,85,204)" target=3D"_blank">Quantum-Resistant Address =
Migration Protocol (QRAMP) Proposal on GitHub</a></p><p style=3D"color:rgb(=
34,34,34);font-family:Arial,Helvetica,sans-serif;font-size:small">I welcome=
 your feedback and suggestions and look forward to engaging in a constructi=
ve discussion on how best to enhance the security and resilience of the Bit=
coin network in the quantum computing era.</p><p style=3D"color:rgb(34,34,3=
4);font-family:Arial,Helvetica,sans-serif;font-size:small">Thank you for yo=
ur time and consideration.</p><p style=3D"color:rgb(34,34,34);font-family:A=
rial,Helvetica,sans-serif;font-size:small">Best regards,</p><p style=3D"col=
or:rgb(34,34,34);font-family:Arial,Helvetica,sans-serif;font-size:small">Ag=
ustin Cruz</p></blockquote></div>

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