<p>The countermeasure is built in the system. All non malicious nodes would instantly discard the fake transactions.
I don't understand the problem statement though, like why would any one want to broadcast fake transactions without any motive that it gets mined.</p>

CC BY-SA 3.0
2018-03-19T01:14:03.900Z
I think OP is trying to imagine some kind of denial of service attack.
Osias Jota
CC BY-SA 4.0
2018-05-05T06:06:05.753Z
and soon enough the fake node will be blacklisted by many other nodes.
Will Gu
CC BY-SA 3.0
2018-02-26T06:58:48.793Z
2018-02-26T06:58:48.793Z
Shabahat M. Ayubi
<p>Either the transactions are valid (including offer a sufficient fee) or not. If they are fully valid, then they will get mined and A and B will pay lots of fees. If they are not fully valid, then everybody will ignore them and they will do no harm whatsoever.</p>

CC BY-SA 4.0
2019-03-22T00:34:29.593Z
2019-03-22T00:34:29.593Z
David Schwartz
<p>Suppose, A and B are malicious attackers. Both want to send unlimited fake transactions to each other. I know that the transactions won't be accepted in the blockchain. In fact, they don't want their transactions to be mined. But, is there any way to take a countermeasure against A and B? And, what will be the cost?</p>

<transaction-verification>
Bitcoin fake transactions
Monmoy Sarker
# Bitcoin fake transactions

(Asked by: username_0 on 2018-02-26)

Suppose, A and B are malicious attackers. Both want to send unlimited fake transactions to each other. I know that the transactions won't be accepted in the blockchain. In fact, they don't want their transactions to be mined. But, is there any way to take a countermeasure against A and B? And, what will be the cost?

**Tags:** transaction-verification


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## 2 answers

### Answer by username_1 on 2018-02-26. Score: 2

The countermeasure is built in the system. All non malicious nodes would instantly discard the fake transactions.
I don't understand the problem statement though, like why would any one want to broadcast fake transactions without any motive that it gets mined.

> **Comments:**
> **username_2**: I think OP is trying to imagine some kind of denial of service attack.  
> **username_3**: and soon enough the fake node will be blacklisted by many other nodes.  

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### Answer by username_4 on 2019-03-22. Score: 0

Either the transactions are valid (including offer a sufficient fee) or not. If they are fully valid, then they will get mined and A and B will pay lots of fees. If they are not fully valid, then everybody will ignore them and they will do no harm whatsoever.


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