Cuando uso el getbalancecomando en bitcoin-cli y lo configuro minconfen 1. ¿Mostrará los bitcoins con 1 confirmación y más? Si esto es cierto, ¿cuál es una buena cantidad de confirmaciones que harán que la transacción sea segura pero también rápida?
Para responder a su pregunta, sí , la configuración minconfmostrará 1el saldo de su billetera que se suma al combinar las transacciones en su billetera que tienen un mínimo de 1confirmación de la red.
Su pregunta secundaria es realmente una pregunta entre equilibrar la seguridad de sus transacciones y la velocidad a la que desea gastar sus fondos, porque esperar, digamos, 2 confirmaciones de red será más rápido (~20 minutos), pero no se confirmará lo suficiente en la cadena de bloques para que la transacción sea "segura".
Esta es esencialmente una forma del "ataque del 50 por ciento":
An attacker that controls more than 50% of the network's computing power can, for the time that he is in control, exclude and modify the ordering of transactions. This allows him to:
Reverse transactions that he sends while he's in control. This has the potential to double-spend transactions that previously had already been seen in the block chain.
Prevent some or all transactions from gaining any confirmations
Prevent some or all other miners from mining any valid blocks
The attacker can't:
Reverse other people's transactions
Prevent transactions from being sent at all (they'll show as 0/unconfirmed)
Change the number of coins generated per block
Create coins out of thin air
Send coins that never belonged to him
With less than 50%, the same kind of attacks are possible, but with less than 100% rate of success. For example, someone with only 40% of the network computing power can overcome a 6-deep confirmed transaction with a 50% success rate.
It's much more difficult to change historical blocks, and it becomes exponentially more difficult the further back you go. As above, changing historical blocks only allows you to exclude and change the ordering of transactions. It's impossible to change blocks created before the last checkpoint.
Since this attack doesn't permit all that much power over the network, it is expected that no one will attempt it. A profit-seeking person will always gain more by just following the rules, and even someone trying to destroy the system will probably find other attacks more attractive. However, if this attack is successfully executed, it will be difficult or impossible to "untangle" the mess created -- any changes the attacker makes might become permanent.
Lo anterior fue tomado de https://en.bitcoin.it/wiki/Weaknesses
Espero que esto ayude
Jan Wytzé