How transaction manipulation handles in Blockchain?

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?

Hina Khuman

Posted 2018-07-26T06:06:53.473

Reputation: 3

Answers

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.

Raghav Sood

Posted 2018-07-26T06:06:53.473

Reputation: 10 897