<blockquote>
  <p>For instance, A has some (i.e: $10) money and A is sending half($5) of it to B. but C manipulate that transaction before going to Blockchain and set $10 instead.</p>
</blockquote>

<p>This is not possible, provided the original transaction is signed correctly. In a regular transaction, you sign the inputs and the outputs. If someone changes the input or output amount, the signature is invalid, and the transaction will not be mined.</p>

CC BY-SA 4.0
2018-07-26T07:03:03.670Z
2018-07-26T07:03:03.670Z
Raghav Sood
<p>I'm new to Blockchain and would like to understand few concepts in a detail. <br>
After reading about basics of Blockchain, one thing is unclear to me about tx. manipulation.</p>

<p>For instance, A has some (i.e: $10) money and A is sending half($5) of it to B.
but C manipulate that transaction before going to Blockchain and set $10 instead.</p>

<p>Now, A wanted to send only $5, but some how A's account will get empty since miner will check A has enough balance or not.</p>

<p>How Blokchain resolves this type of scenario?  </p>

<transactions><blockchain><unconfirmed-transactions>
How transaction manipulation handles in Blockchain?
Hina Khuman
# How transaction manipulation handles in Blockchain?

(Asked by: username_0 on 2018-07-26)

I'm new to Blockchain and would like to understand few concepts in a detail.   
After reading about basics of Blockchain, one thing is unclear to me about tx. manipulation.

For instance, A has some (i.e: $10) money and A is sending half($5) of it to B.
but C manipulate that transaction before going to Blockchain and set $10 instead.

Now, A wanted to send only $5, but some how A's account will get empty since miner will check A has enough balance or not.

How Blokchain resolves this type of scenario?

**Tags:** transactions, blockchain, unconfirmed-transactions


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## 1 answers

### Answer by username_1 on 2018-07-26. Score: 1 | Accepted answer

> For instance, A has some (i.e: $10) money and A is sending half($5) of it to B. but C manipulate that transaction before going to Blockchain and set $10 instead.

This is not possible, provided the original transaction is signed correctly. In a regular transaction, you sign the inputs and the outputs. If someone changes the input or output amount, the signature is invalid, and the transaction will not be mined.


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