Timeline for Strange double-spending attack possibility
Current License: CC BY-SA 4.0
4 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Sep 18, 2023 at 16:18 | comment | added | Denys Malovanyi | I agree, I don't have a private key for the first UTXO, but I can just copy the input that spends this UTXO from another transaction along with the signature which unlocks it. As I know transactions are broadcasted to the network when created. If someone will be fast and lucky enough to catch this transaction early, copy-paste its input and add their own one, then broadcast the new transaction so that miners will receive it before the original reaches them, one could potentially steal the money. | |
| Sep 18, 2023 at 16:12 | comment | added | Michael Folkson | @DenysMalovanyi: To unlock a UTXO it requires a signature for a specific public key. You can try adding an additional UTXO that requires a signature from a public key that you own the private key for. But you won't have the private key to provide a signature to unlock the first UTXO, just the second. Hence you won't be able to spend the first UTXO. | |
| Sep 18, 2023 at 16:05 | comment | added | Denys Malovanyi | I undestand that. But you could change the signature also and sign it with YOUR key. Since public key is retrieved from one of the inputs (and one of them has my public key), it can be the input with my public key, so the signture will be valid. | |
| Sep 18, 2023 at 14:51 | history | answered | Michael Folkson | CC BY-SA 4.0 |