One transaction on its own may not seem malicious, but when a combination of potentially harmful transactions occur globally throughout the network, the results could be disastrous.
Potentially harmful transactions, such as updates to battle plans, or changes to passwords are assigned a negative feedback score, whereas harmless transactions, such as reading or printing non-classified files, are assigned positive feedback scores.
A node that has conducted many potentially harmful transactions in the recent past will have a low reputation score, and service will be denied to it, even if it possesses a privileged role, thus thwarting any potential global attacks.
But this extreme position suffers the familiar drawbacks of unregulated market economies: a toleration of severely harmful transactions (e.g., purchasing tickets to a match of gladiatorial combat), the exacerbation of economic inequalities, and a permissive stance to transactions with long-term adverse consequences, which lead to "tragedies of the commons" and environmental devastation.
It turned out that in this case, byzantine transactions were much less harmful than blind transactions.
We observe and formulate harmful ordering under transaction pipeline and propose to rearrange statements in decreasing order of contention to eliminate harmful ordering.
To solve this problem, we for the first time observe and formulate the source of restricted concurrency as harmful ordering of transaction statements.
(Feinberg, 14) In other cases of non-harmful exploitation, the transaction appears to benefit both A and B, as may be true of organ sales or commercial surrogacy.
First, it can arrange the transactions so that the same harmful ordering from different transactions does not overlap.
While some exploitative transactions are harmful to the exploitee, we often call exploitative cases in which the exploitee seems to gain from the transaction.
The stock-level update routine in new-order transaction exhibits a harmful ordering, but the conflicting operations are rarely contended due to the large item table.
