Afaik, the transaction malleability could allow a malicious miner to change the transaction ID of a transaction before it is confirmed on the bitcoin network.
Can this also be used to change the data field of a Datacoin transaction?
I think that this thing should be very useful to know for a ledger that is a Censorship-Free Data Storage.
Well, I will try to reply to myself.
Datacoin has the transaction malleability issue that will allow an attacker to modify the signature and then the TXID
But if the attacker modifies the transaction, it would be marked invalid by the clients because transaction signature verification will fail.
Because Datacoin puts the data fields in the transaction that must be signed, no one can modify the data fields without invalidate the signature.
So the data field of a Datacoin transaction cannot be changed, even if it is still in the mempool.
Am I correct?
Thouths?
Thanks to everyone