"Empfangen von einer Adresse" ist irreführend. Sie können in der Tat potentiell zu identifizieren, die Adressen der Eingänge einer Transaktion gutzuschreiben, den Sie zuvor zugewiesen, aber das ist nicht garantiert, und wird nicht zwangsläufig in einer einzelnen Adresse/Wert-paar. Münzen (Transaktion Ausgänge) zugeordnet sind, - Adressen und bekommen produziert/konsumiert von Transaktionen. Könnte man erweitern auf diese Antwort? So wird der Empfänger prüfen, ob die Transaktion durch Unterschrift den Absender manuell, richtig? Und es gibt keine Unterstützung für gemeinsam die Unterzeichnung einer Transaktion von Bitcoin-Netzwerk?

Wenn das time-warp-bug wurde behoben, bitcoin, würde das vergleichen Ketten von der Länge immer zu dem gleichen Ergebnis wie der Vergleich von Arbeit?

Nein. Es ist ganz einfach erstellen Sie eine Kette mit mehr chainwork aber weniger Blöcke. Zum Beispiel, können sagen, wir haben eine Kette mit 2,016 Schwierigkeitsgrad 1-Blöcke. Diese Kette angelegt ist 20,160 Minuten, so dass die Schwierigkeit nicht ändern, nächsten Periode, was bedeutet, dass durch die block-4,032 wir haben 4032diff chainwork:

 2016 * diff1 == 2016diff
+ 2016 * diff1 == 2016diff
--------------------------
 4032 Blöcke mit 4032diff

Dann kam jemand Minen eine alternative Kette mit mining-Ausrüstung, die ist 4 mal schneller, die Herstellung der ersten 2,016 Blöcke in 5,040 Minuten. Die Schwierigkeit erhöht sich um 4 und von block 2,521 diese Kette hat mehr Kette arbeiten, aber weniger Blöcke als die erste beschriebene Kette.

 2016 * diff1 == 2016diff
+ 505 * diff4 == 2020diff
--------------------------
 2521 Blöcke mit 4036diff

Ich nehme an, Sie sind mehr daran interessiert, die praktische Angriffe gegen Bitcoin ist mainnet Kette, wenn diese Kette noch verwendet längste-ist-beste Logik. Hier ist ein einfacher:

  • Der Genesis Block ist vom 3. Januar 2009. Wenn Sie abgebaut einzige Schwierigkeit-1 Blöcke von damals bis heute (144 Blöcke pro Tag), müsstest du ungefähr (144*365*6)+(30*144)==319680 die Blöcke.

  • Die "echten" block-Kette hat 342,908 Blöcke, ein 23,228 block Unterschied.

  • Da die Schwierigkeit kann erhöht nur 4x in einem einzigen 2,016-block Zeit -, Bergbau-23,228 Blöcke würde nur erfordern, gehen von Schwierigkeit 1 Schwierigkeit 4**(23228 / 2016) == 4194304.

  • Obwohl Schwierigkeiten 4,194,304 klingt hoch. Aktuelle mainnet Schwierigkeit ist 44,455,415,962. Also, wenn ich mein Mathe-Recht, Sie können eine Kette erstellen, die länger als mainnet mit etwa 0.001% der aktuellen Netzwerk-hashrate.

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