Another idea I had was to use a deterministic POW rather than a random
one like hash collision. Cryptographic work on "timed commitments" and
related topics has shown that repeated squarings modulo an unknown RSA
modulus allow for a relatively concise and quickly verifiable proofs that
some very large number of squarings had taken place, with no shortcuts
possible for the creation of the resulting certification. Broadly
speaking, modular squaring is logically reversible, in that one could
theoretically compute the square root. But in practice, as with the
hash computation, computing a modular square using logically reversible
operations will produce a large number of excess bits. Even if the excess
from a single squaring could be consumed using the trick mentioned
above, one would still be forced to erase the temporarily result of
each individual squaring operation, as the POW would require a very
large number of squarings. So the overall dissipation would appear to
be similar to the hash computation.

(Also, it's not clear that a deterministic POW works well for an
application like Bitcoin; it might let the owner of the fastest computer
win every POW race, giving him too much power.)

So the question from John's challenge remains open: is there a POW
system which could be built solely on logically reversible computation?
The computation has to be intrinsically time consuming, but with a short
and quickly verifiable certificate of validity.

Hal Finney
https://www.metzdowd.com/pipermail/cryptography/2009-January.txt

Hal Finney on digital cash traceability.
2020 01 02

Hal wrote about digital cash and traceability in 1994 on the Cypherpunk Mailing List:

…"the political point is that if you can make an untraceable payment, you could be coerced into doing so, for example by being robbed at gunpoint. Contrariwise, if the cash system used by you and your bank is such that all money is inherently traceable, it will be a lot harder to commit robbery, extortion, kidnapping, and all those other horrors which people fear will come with digital cash."

https://breakingsatoshi.substack.com/p/hal-finney-on-digital-cash-traceability

44:30 How Hal Finney & Ray Dillinger helped

"Who created Bitcoin?
Craig Wright reveals alleged contributors for the first time |
Full Interview" 1h38
27 abr. 2019
Crypto Finder
https://youtu.be/8_SoIXUBIhw

Hal Finney on cryptography and government
Deryk Makgill
Jan 7, 2020
https://breakingsatoshi.substack.com/p/hal-finney-on-cryptography-and-government

Hal Finney on digital cash traceability
Deryk Makgill
Jan 2. 2020
https://breakingsatoshi.substack.com/p/hal-finney-on-digital-cash-traceability

Hal <hfinney@shell.portal.com> (542 posts)
http://mailing-list-archive.cryptoanarchy.wiki/authors/hal_hfinney_at_shell_portal_com_/

Bitcoin P2P e-cash paper
Satoshi Nakamoto satoshi at vistomail.com
Fri Nov 14 13:55:35 EST 2008
https://www.metzdowd.com/pipermail/cryptography/2008-November/014853.html

44:30 How Hal Finney & Ray Dillinger helpedspecialization
https://youtu.be/8_SoIXUBIhw

"Who created Bitcoin?
Craig Wright reveals alleged contributors for the first time |
Full Interview" 1h38
27 abr. 2019
Crypto Finder

https://www.finder.com/dr-craig-wright-explains-the-origins-of-bitcoin-full-interview

Nakamoto's Neighbor: My Hunt For Bitcoin's Creator Led To A Paralyzed Crypto Genius
Andy Greenberg
Mar 25, 2014
https://www.forbes.com/sites/andygreenberg/2014/03/25/satoshi-nakamotos-neighbor-the-bitcoin-ghostwriter-who-wasnt/#1e5593574a37

Now you can have a FULL list with all the Telegram channels that I have been creating, organized alphabetically

Please subscribe to the news letters and you will receive an email with each new blog post

Thank you for making blockchain and BitCoin technology better known every day.
https://ramonquesada.com/english/telegrams-channels-names-in-alphabetical-order/

Re: Did Satoshi cash out 77,624 BTC?
October 15, 2013, 09:57:55 PM
Last edit: October 15, 2013, 10:15:54 PM
by TippingPoint
https://bitcointalk.org/index.php?topic=311216.0



This is the transaction to Hal Finney (the first transaction ever) on 2009-01-12 03:30:25
http://blockchain.info/address/1Q2TWHE3GMdB6BZKafqwxXtWAWgFt5Jvm3

Hal Finney sent the 10 BTC on 2010-11-16 to another address that is still active. There are no connections between '12hig' and Hal Finney's addresses.

If it's not Satoshi, then somebody who started mining one day after Satoshi tested the transaction system the first time.

The following are a series of emails from Satoshi Nakamoto to Hal Finney, written in January 2009 as the two were working on early versions of the bitcoin software. Mr. Finney supplied these emails to The Wall Street Journal in the spring of 2014.

Since these emails were all coming from Nakamoto to Mr. Finney, they are Nakamoto’s responses to Mr. Finney’s emails, the body of which is marked by the > symbol. The exchange begins on Jan. 10, 2009, and ends on Jan. 24, 2009, and comprises the time they were working on versions 0.1.0 through 0.1.3 of the bitcoin software.

Bitcoin P2P e-cash paper
Hal Finney hal at finney.org
Fri Nov 7 18:40:12 EST 2008
https://www.metzdowd.com/pipermail/cryptography/2008-November/014827.html