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51% Attacks: What Africans Need To Know
I'm a Content Creator.  Feb 28, 2023
51% Attacks: What Africans Need To Know

A 51% attack is when one or more miners control more than half of the network's mining activity and launch an attack against a blockchain. When this occurs, the miners can make a copy of the blockchain that omits specific transactions and mark it as the original version. They will be able to double spend coins after reversing transactions due to this.


Understanding the details


A blockchain is a network of interlinked blocks used to store data in a digital ledger. By a process of verification, the blockchain network comes to a consensus about transactions, and the blocks containing the data are then sealed. When one organization holds more than half of the network's hashing power, the 51% attack takes place. Then, because the attackers control the majority of the blockchain, these group of hackers add a deviant blockchain to the network at a very specific point in the blockchain.


Despite acquiring a sizable portion of the blockchain, the hackers will have a very difficult time changing blocks that were locked prior to the attack. It is more difficult to modify transactions that are deeper in the past. Another problem is the excessively high cost of carrying out 51% attacks. An attack of this kind is challenging on a big network with lots of users. Before out-hashing the mainnet, the group of attackers would need to possess the required 51% of the market and have built an alternative blockchain. The main barrier preventing more frequent occurrence of 51% attacks is the expense involved.


Who is at risk?


Because certain mining networks are more secure than others, the kind of mining equipment being used is also important. Smaller networks are typically targets for 51% attackers since it is simpler to take control of the majority in such networks, while larger networks like Bitcoin are less likely to be attacked. Since June 2019, more than 40 51% attacks on Bitcoin Gold, Litecoin, and other minor cryptocurrencies have been discovered or reported to the Michigan Institute for Technology's Digital Currency Project.


Conclusion


The frequency of blockchain hacks is rising, giving the technology the appearance of being very unstable. This is because the industry's weaknesses in offering sufficient security to its clients have been made public. Hackers have stolen more than $2 billion since 2017, and the number of occurrences does not appear to be decreasing. This has made it quite clear that hacking blockchain technology is not impossible, and users should exercise caution or suffer costly repercussions.

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