how safe is blockchain

How Safe Is Blockchain? (2021)

People often hesitate to invest in something mainly because of safety concerns. It is quite fair for users to make sure their decision might not cause security issues in the future.

Throughout the years, blockchain has grown its fandom. Blockchain technology has proven itself to be safe in terms of protecting private information, it does not make it completely safe. 

But the question remains, is blockchain safe?

If you are planning on investing in bitcoin or just want some information on the blockchain, you are at the right place. Caizcoin is surely the safest platform that helps you to invest your money in a profitable and authentic way. Read on to learn more about exactly how safe blockchain is. 

What is blockchain?


Blockchain is an open ledger technology that can be accessed by numerous parties at the same time. Blockchains are most famous for their role in the Bitcoin cryptocurrency.

Blockchain functions in a relatively simple manner. When a new record is made, it turns into a block with its distinguishing number. A blockchain is created by connecting the blocks into a chain of records, hence the name. The best part is the records can not be changed without the consent of involved parties.

This technology has the ability to deliver secure transactions, lower compliance costs, and accelerate data transfer processing. Moreover, it is great in helping contract management as well as analyzing products. 

Benefits of Blockchain 

It is smart to opt for an option with as many benefits as one can get. Therefore, if you ever plan to adopt blockchain into your business, here are some benefits you can get:

  • Blockchain is secure for its users no matter one. It has an encryption feature that ensures security instantly.
  • The ledger is updated automatically once the transactions are made. These transactions are done transparently.
  • There are no intermediary fees required since blockchain is a decentralized system. 
  • Blockchain is an immutable public digital ledger, which means you can not change transactions once they have been recorded.

How does blockchain work?

Think of blockchain as amazon in the sense that it relies on a decentralized network. Instead of relying on a single server, different parties can access the database and transactions. To put it simply, no single party has the upper hand to control the data or any other information.

When it comes to transactions, it takes place between the addresses on the blockchain. Users on the blockchain are identified with a 30-plus character alphanumeric character. However, blockchain gives the users an option to stay anonymous or not depending on their convenience. Moreover, anyone with access to the system can view the transactions. 

People usually get confused about the irreversibility of records. To clarify, you can’t change the record once a transaction is put in the database and the accounts are updated. This is because the record is linked to every previous transaction record. This explains the term ‘chain’ as well. To ensure the database is well updated and permanent, computational approaches are used. 

How safe is Blockchain?

Blockchain is basically a series of blocks that store information and data. These blocks hold a unique hash number along with a link that connects to the previous block.

These series of blocks create a chain where neither the sequence nor the information in the block can be changed because of its chronological order. If an attempt is made to change it, the block becomes invalid consequently, Although the aforementioned information proves blockchain’s safety, a few other aspects play a role in it as well. The three points discussed below are also the backbone of blockchain’s safety:

  • Cryptography

First things first, cryptography plays a massive role in blockchain safety as it protects all its transactions. Each of the blocks holds a private key. This unique key is verified by using a public key. Like mentioned previously, the block becomes invalid when transaction-related data changes. 


  • Consensus

Verification of transactions on such a big platform is necessary to prove its credibility. Hence, a consensus model underpins blockchain. It mainly verifies and legitimizes all the transactions that take place here. 

  • Decentralization

Since blockchain is a distributed and decentralized ledger technology, it gives them a better line of defense. This creates an extremely low chance of getting corrupt or hacked without affecting other parts of the system. On the other hand, private blockchain has a single point of control so the above-mentioned advantage does not apply to it. Such blockchains are used by big organizations for internal purposes as it allows them more control over them.

What makes blockchain safe and secure?

Generally, blockchains are considered safe and secure as you can not mess around them easily. Put blockchain this way, if the chain of information is all the way, it is nearly impossible to tamper with it. Meaning, it is mostly safe.

Moreover, blockchains are decentralized. Since there isn’t a single point of entry into blockchains, this characteristic benefits us by making it harder for thieves to gain access to blockchain data. 

One advantage of blockchain is that user activity is traceable. This is convenient for when someone tries to tamper the information in a specific block, a key associated with blockchain is used to trace the user.  

Blockchain is founded on the notion that data can only be recorded but never changed. Once it’s done, it is done. In case someone attempts to change any information, their credentials are canceled instantly, and the block would no longer be valid.

When it comes down to hacking, one can not be 100% confident to say that it is impossible. But it is not a child’s play to hack blockchain either. It certainly takes a lot to get hacked. However, there are chances of getting tricked in other ways.

Are there any Blockchain vulnerabilities?

While experts claim blockchain to be the safest transactional system, hackers have found their way to exploit sensitive information. There are yet a few vulnerabilities that hackers try to crack on Blockchain with their skills. Such as:

  • Malware

Malware lets the hacker disable the security system to steal private information. Similarly, hackers hook up malware to a blockchain transaction without the authorized user’s knowledge. Unfortunately, this action corrupts the blockchain and allows the hacker to easily access or view data and transaction details. 

However, experts suggest it is ideal to install Agent to prevent malware from corrupting blockchain. 

  • 51% Attacks

51% attack is a threat to bitcoin more than any other network. It works in a way that if a Bitcoin user has control over more than 50% of a blockchain’s computer capacity, they can effectively take over the network.

  • Key

Just like other computer and account passwords, blockchain ‘passwords’ can get hacked. To access blockchain, authorized users are given unique private ‘keys’ which are password protected for extra security. 

The possibility of getting passwords hacked can be due to reusing them as well as becoming prey to phishing scams.

  • Smart Contract

A lot of blockchain tasks are handled by smart contracts. The extent of security, on the other hand, depends on the protection provided by the designed code for them. If this specific code is easy to hack, Cybercriminals can smoothly penetrate the blockchain through the smart contract. Of course, this will allow them access to steal money from it. 

Wrapping it up

No doubt every invention has concerns whether its security or getting numbers up. Even after years of being around, blockchain users seem to look for an answer to their security concerns.

It is safe to say that blockchain security is in the user’s hands. The key is to keep their keys 


Bitcoin network is the first platform that tackled the double-spending issue. Blockchain helps to prevent double-spending by timestamping groups of transactions. They later broadcast them to all nodes. Moreover, these transactions are irreversible and hard to tamper with because they are time-stamped on the blockchain and tied to prior ones.

Yes, blockchain can help you validate authenticity. All you have to do is register an event on blockchain to prove its authenticity. 

Blockchain is built on the concept that once the data is recorded on a block, it can not be altered. Each block contains a hash that is connected to the previous blocks. The block keeps getting farther whenever a new one is added. The farther the block gets, the more impossible it becomes to tamper with it. Therefore, blockchain is considered tamper-proof.

Yes, blockchain supports data privacy by giving the users ownership over their sensitive data, thanks to private and public keys. This allows the owners to control the activities of a third party over their data in case it is stored on the blockchain. Under this scenario, third parties can not misuse the user’s data.

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