Knowing Some Common Attacks Made on Bitcoin’s Blockchain

Bitcoin is often regarded as the safest cryptocurrency due to the amount of protection afforded to its network at various stages of transaction processing. However, certain attacks have been registered to its network several times. As a result, in this section, we will go through some of the most prevalent threats detected in the bitcoin system. If you are interested in bitcoin trading check your first bitcoin using android device .

Sybil Attack

In a peer-to-peer (P2P) network, a Sybil attack is likely to occur. The bitcoin network is being attacked by a malicious or hostile actor. In this form of attack, a node uses many identities simultaneously to weaken the authority of the network. The hostile attacker seeks to capture a majority of the network’s power in an attempt to perform illicit activities on it.

Although a Sybil assault on a network can be hard to trace and stop, several steps can be taken to identify them and prevent the network from carrying out illegal actions. Some of such steps are:

  •       If any new identity is coming to get itself registered, the network shall enhance the charges for creating it.
  •       A verification process shall be done, such as identity checking for trusting that party to join the network.
  •       To entrust the members at different levels certain powers to ensure that no wrong party is getting to the network.

51% Attack

A 51% attack is one such potential threat to a bitcoin network. In this attack, either an individual miner or a group of people can hold the position of the miners and attempt to control more than half of the mining power, its hash and also the computing power. In this situation the miners viz-a-viz the attacker hinders the confirmation of the transaction that is taking place and also tries to reverse the transactions that have taken place as being confirmed resulting in the problem of double-spending.

When a block has legitimate information in it, the miners on the network display it to the other miners on the network. The only way that the new transaction gets verified is when the current data on the network is also matched and legitimate. But in the case of the attackers, they do not broadcast their data to the rest of the network members. This situation gives rise to two blockchain versions.

Race Attack

Then the following attack that we are going to talk about is the race attack. The receivers in this attack should take the transaction that has yet not been confirmed as payments. Being an attacker, by utilizing the same device you can transfer the same coins to two different sellers. If the seller, without considering the confirmation to a block delivers it, it will be detected that such a thing happened during the mining process was going on. There is no alternative in such a situation and the seller must wait for at least one confirmed block to deliver things.

Finney Attack

The name for this attack has been taken from Hal Finney. In this attack problems such as double spending occurs. A regular miner, mining on an everyday basis is the attacker. He/she adds an exchange inside the block that transfers part of his coin to himself without disclosing the exchange to the other miners. The same transaction will be sent in a block that is already mined but the other miners will reject it.

Closing thought

This blog mentions some very prevalent attacks that can be carried out on any cryptocurrency network. But if proper precautions are taken, you can mitigate the incidence of such attacks.


Ajay Deep

Ajay Deep is a young enthusiast who Loves Chandigarh and is always eager to make this beautiful city even more beautiful. A Mechanical Engineer By Chance and Working in an IT MNC by Choice. A Writer, Photographer and a Budding Entrepreneur. A Designer, Developer and Digital Marketing Expert. In brief : A Jack of All Trades and Master of Few :) You may reach Ajay Deep at
Back to top button