Hal Finney (cypherpunk)
Hal Finney (born May 4, 1956) is a developer for PGP Corporation, and was the second developer hired after Phil Zimmerman. In his early career, he is credited as lead developer on several console games (Adventures of Tron, Armor Ambush, Astroblast, Space Attack).[1] He is a 1979 graduate of the California Institute of Technology, holding a BS in engineering.
Bitcoin and me
https://bitcointalk.org/index.php?topic=155054.msg1643833#msg1643833
http://www.forbes.com/sites/andygreenberg/2014/03/25/satoshi-nakamotos-neighbor-the-bitcoin-ghostwriter-who-wasnt/
http://en.wikipedia.org/wiki/Hal_Finney_%28cypherpunk%29
https://www.linkedin.com/in/hal-finney-541342/
https://www.facebook.com/hal.finney1?ref=br_rs
https://twitter.com/halfin
Hal Finney (born May 4, 1956) is a developer for PGP Corporation, and was the second developer hired after Phil Zimmerman. In his early career, he is credited as lead developer on several console games (Adventures of Tron, Armor Ambush, Astroblast, Space Attack).[1] He is a 1979 graduate of the California Institute of Technology, holding a BS in engineering.
Bitcoin and me
https://bitcointalk.org/index.php?topic=155054.msg1643833#msg1643833
http://www.forbes.com/sites/andygreenberg/2014/03/25/satoshi-nakamotos-neighbor-the-bitcoin-ghostwriter-who-wasnt/
http://en.wikipedia.org/wiki/Hal_Finney_%28cypherpunk%29
https://www.linkedin.com/in/hal-finney-541342/
https://www.facebook.com/hal.finney1?ref=br_rs
https://twitter.com/halfin
Forbes
Nakamoto's Neighbor: My Hunt For Bitcoin's Creator Led To A Paralyzed Crypto Genius
Hal Finney's light brown eyes are pointed down. I've just asked him if he was involved in the creation of Bitcoin. The 57-year-old man's almost imperceptible eye movement is his only way of telling me that he was not, and that I've spent the last week caught…
Forwarded from Bitsonline
Hackers Still Targeting Hal Finney’s Family Over Satoshi Nakamoto
Fran Finney, wife of the late Bitcoin legend Hal Finney, said her Twitter account was hacked by someone claiming to have information on the identity of Satoshi Nakamoto. Although the incident was minor, it’s not the first time bad actors have targeted the Finney family. Also read: China Cracks Down on ICO Activity as Blockchain Conferences Cancel […]
The post Hackers Still Targeting Hal Finney’s Family Over Satoshi Nakamoto appeared first on Bitsonline .
https://bitsonline.com/hackers-targeting-finney/
Fran Finney, wife of the late Bitcoin legend Hal Finney, said her Twitter account was hacked by someone claiming to have information on the identity of Satoshi Nakamoto. Although the incident was minor, it’s not the first time bad actors have targeted the Finney family. Also read: China Cracks Down on ICO Activity as Blockchain Conferences Cancel […]
The post Hackers Still Targeting Hal Finney’s Family Over Satoshi Nakamoto appeared first on Bitsonline .
https://bitsonline.com/hackers-targeting-finney/
Forwarded from José Antonio Bravo Mateu No doy consejos de inversión
Me gusta lo que dice sobre Hal Finney: "Strong candidate for Satoshi". Siempre ha sido mi opción número 1
Forwarded from José Antonio Bravo Mateu No doy consejos de inversión
Seguramente Satoshi es un grupo: Adam Back-Nick Szabo-Hal Finney-(otros)
Forwarded from Phil Wilson
If you have a read of Hal's RPOW ( reusable proof-of-work ) the idea is that once energy has been used to create an object ( in this case, bitcoin ) then that energy can be reused by transferring it into other forms ( example: XCP/ XCPC )
Forwarded from Phil Wilson
The first first law of thermodynamics is used to transfer electrical energy into bitcoin.
So using burning to change that object into something else is pretty fundamental to the technology itself.
I don't think there should ever be a "one-off" burning.
So using burning to change that object into something else is pretty fundamental to the technology itself.
I don't think there should ever be a "one-off" burning.
Forwarded from Phil Wilson
Hal's website is where proof-of-work was first described clearly enough.
Forwarded from Phil Wilson
If anyone is into the Bitcoin tech ( and counterparty is on top of that tech ) then Hal's website is a much-read
Forwarded from Phil Wilson
You could effectively remove every single reference in the Bitcoin white-paper and replace it with a link to Hal's website.
It's that important.
It's that important.
Forwarded from Phil Wilson
Forwarded from BitCoin History (@RamonQuesada)
leparisien.fr
RECIT. Qui était Hal Finney, l'homme qui reçut les premiers bitcoins ?
LE PARISIEN WEEK-END. Il y a neuf ans, la première transaction en bitcoins, dont la cote flambe actuellement, était réalisée. Si l’identité de l’inventeur de cette monnaie numérique reste mystérieuse, celle de son premier utilisateur est connue : Hal Finney…
Forwarded from Ramon Quesada - News 🌷 (@RamonQuesada)
Una joya historica del 2009, espero que conozcais a Hal Finney la primera persona que recibio una transaccion de Satoshi. https://twitter.com/halfin/status/1153096538
X (formerly Twitter)
halfin (@halfin) on X
Thinking about how to reduce CO2 emissions from a widespread Bitcoin implementation
Forwarded from José Antonio Bravo Mateu No doy consejos de inversión
Satoshi es Hal Finney, es Wei Dai, es Adam Back, es Nick Szabo, y es toda la gente que desde finales de los 70 estaba trabajando la criptografía de doble entrada para buscar soluciones útiles
Forwarded from Ramon Quesada - News 🌷 (@RamonQuesada)
What is a Finney attack? Extra points for explaining its purpose, the prerequisites for it to be possible, how the attack can be performed and the origin of the name "Finney attack".
asked Oct 3 '12 at 9:03
The Finney attack is named after Hal Finney, who suggested it in this comment. (Hal happens to be the first recipient of a Bitcoin transaction, and the first person to comment on the release of the Bitcoin source code.)
It is a double spending attack with the following features:
It only works if the merchant accepts unconfirmed transactions.
It still works, however, if the merchant waits a few seconds to verify that everyone in the network agrees he was paid.
It requires the attacker to be mining and controlling the content of his blocks; however, he can in theory do this with any hashrate, in particular significantly less than 50% of the network hashrate.
It proceeds as follows:
The attacker mines blocks normally; in the block he is trying to find, he includes a transaction which sends some of his coins back to himself, without broadcasting this transaction.
When he finds a block, he does not broadcast it; instead, he sends the same coins to a merchant for some goods or service.
After the merchants accepts the payment and irreversibly provides the service, the attacker broadcasts his block; the transaction that sends the coins to himself, included in this block, will override the unconfirmed payment to the merchant.
If the time from finding the block until the attacker sends payment and the merchant accepts it is t, and the average time to find a block is T, there is a probability of t/T that another block will be found on the network in this time; in this case the attack will fail, and the attacker will lose the block reward of B.
This means that the average cost of attempting the attack is about (t/T) * B; as a rule of thumb the merchant should wait at least t=V*T/B (V is the value of the transaction), to make sure that trying to carry out this attack against him isn't profitable; this may not be sufficient though, as a nimble attacker can use the same block for multiple attacks, potentially gaining the total of their value.
Clearly, the lower the attacker's hashrate, the less opportunities he has to carry out the attack. If the attack is for obtaining some illiquid good, it is difficult to make the need for this good coincide with finding a block. If the attack is for obtaining something liquid (e.g. exchanging bitcoins for other money), an opportunity is ever-present but the merchant is likely to require a few confirmations. This makes the attack difficult to use in practice.
https://bitcoin.stackexchange.com/questions/4942/what-is-a-finney-attack
asked Oct 3 '12 at 9:03
The Finney attack is named after Hal Finney, who suggested it in this comment. (Hal happens to be the first recipient of a Bitcoin transaction, and the first person to comment on the release of the Bitcoin source code.)
It is a double spending attack with the following features:
It only works if the merchant accepts unconfirmed transactions.
It still works, however, if the merchant waits a few seconds to verify that everyone in the network agrees he was paid.
It requires the attacker to be mining and controlling the content of his blocks; however, he can in theory do this with any hashrate, in particular significantly less than 50% of the network hashrate.
It proceeds as follows:
The attacker mines blocks normally; in the block he is trying to find, he includes a transaction which sends some of his coins back to himself, without broadcasting this transaction.
When he finds a block, he does not broadcast it; instead, he sends the same coins to a merchant for some goods or service.
After the merchants accepts the payment and irreversibly provides the service, the attacker broadcasts his block; the transaction that sends the coins to himself, included in this block, will override the unconfirmed payment to the merchant.
If the time from finding the block until the attacker sends payment and the merchant accepts it is t, and the average time to find a block is T, there is a probability of t/T that another block will be found on the network in this time; in this case the attack will fail, and the attacker will lose the block reward of B.
This means that the average cost of attempting the attack is about (t/T) * B; as a rule of thumb the merchant should wait at least t=V*T/B (V is the value of the transaction), to make sure that trying to carry out this attack against him isn't profitable; this may not be sufficient though, as a nimble attacker can use the same block for multiple attacks, potentially gaining the total of their value.
Clearly, the lower the attacker's hashrate, the less opportunities he has to carry out the attack. If the attack is for obtaining some illiquid good, it is difficult to make the need for this good coincide with finding a block. If the attack is for obtaining something liquid (e.g. exchanging bitcoins for other money), an opportunity is ever-present but the merchant is likely to require a few confirmations. This makes the attack difficult to use in practice.
https://bitcoin.stackexchange.com/questions/4942/what-is-a-finney-attack
Bitcoin Stack Exchange
What is a Finney attack?
What is a Finney attack? Extra points for explaining its purpose, the prerequisites for it to be possible, how the attack can be performed and the origin of the name "Finney attack".
Forwarded from José Antonio Bravo Mateu No doy consejos de inversión
Fue Hal Finney el que dijo que un atacante malicioso podría incluir una transacción de A a B (direcciones que controla) en un bloque, y meter en el mismo bloque una transacción de A a C (que no controla). Si aceptásemos 0 confirmaciones, la transacción de A a C la aceptarías pero nunca se produciría. Eso es lo que se conoce como "ataque Finney" y por eso se requiere al menos una confirmación (y lo de las 0-conf es una boutade)
Forwarded from Ramon Quesada - News 🌷 (@RamonQuesada)
Hal es una de las personas que mas admiro en el criptomundo, quien recibió la primera transacción de Satoshi Nakamoto y le ayudó en los inicios, a mejorar el codigo de Bitcoin, Actualmente criogenizado, a la espera de una cura futura para el ELA.
Who is Hal Finney? Was He the Real Man Behind Bitcoin?
https://101blockchains.com/who-is-hal-finney-bitcoin/
Who is Hal Finney? Was He the Real Man Behind Bitcoin?
https://101blockchains.com/who-is-hal-finney-bitcoin/
101 Blockchains
Who is Hal Finney? Was He the Real Man Behind Bitcoin?
In the modern world, everything is moving fast as the technology around us advances at a rapid pace. One perfect example of the modern technology and its
¿Se pueden encontrar pistas sobre los primeros misterios de Bitcoin en un cerebro crioconservado? - http://goo.gl/alerts/a5E9B
Criptomonedas e ICOs
¿Se pueden encontrar pistas sobre los primeros misterios de Bitcoin en un cerebro crioconservado? | Criptomonedas e ICOs
Se ha especulado a lo largo de los años sobre si el último desarrollador de software, Hal Finney, era en realidad Satoshi Nakamoto. Algunas personas se preguntan si tenía alguna conexión con los 700,000 bitcoins extraídos en los primeros días del protocolo.