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Cryptocurrencies have been renowned for the anonymity they offer through decentralized transactions and other services they offer. Since the creation of Bitcoin, several cryptocurrencies have been created that retain many of the characteristics of Bitcoin. However, while transactions are decentralized and somewhat anonymous on the blockchain of cryptocurrencies like Bitcoin, they are not completely private. It just so happens that every Bitcoin used in a transaction can be traced back to previous transactions.
This reality gave rise to a new idea of cryptocurrencies and platforms with untraceable and completely private coins, called privacy coins.
The term privacy coins refers to coins that do not give information about cryptocurrency transactions. One of the reasons privacy coins were created is to acquire people's right to privacy and apply it to digital transactions or other decentralized digitized services.
A second reason is that cash must also be digitized. Since cash cannot be traced unless it is deposited into a bank account and used to purchase through that account.
Another reason is fungibility: one currency is completely the same as another. For example, if a Bitcoin is used for an illegal transaction, that Bitcoin becomes 'tainted' since contaminated Bitcoin may be more difficult to sell because many people will not accept Bitcoin with that background. In contrast, privacy coins are impossible to trace. Therefore, each coin is the same as any other, regardless of the coin's background (even if it has been used for illegal transactions). The two key components of privacy coins are anonymity and untraceability.
Like other cryptocurrencies, privacy coins work through blockchain technology. All transactions are decentralized, which means there is no need for a third party to regulate transactions. The transactions are verified by the nodes that are part of the network. In order to verify these transactions, the nodes have to solve complex mathematical problems that prove that the transaction is valid. Once the transaction is confirmed, the information is added to the blockchain and other nodes update their information.
As a consensus mechanism, privacy coins use Proof of Work (PoW), Proof of Stake (PoS), or a hybrid version of both PoW and PoS. Each privacy coin can differ in terms of functionality when it comes to what makes it different from other cryptocurrencies.
These are the main strategies used by privacy coins:
1) Hidden Addresses: As the name suggests, hidden addresses mean privacy. Every time you receive a coin, a new address is created, making it impossible for others to use your address as a destination in the future. This is one of the easiest ways to ensure privacy on the blockchain.
2) Circle Signatures: Circle signatures are another way to ensure privacy. When you sign a transaction with a private key, others can easily link that signature to your address. Circle signatures prevent this. Through a 'circle' of random signatures confirming the transaction with you, it becomes more difficult for others to link the transaction to your address because there are so many signatures. The larges the signature circle, the more private your address is. Inaddition to circle signatures, a way to ensure more privacy based on your model with circle confidential transactions. In the same way that the address is made private using ring signatures, the amount of money involved in the transaction is also hidden.
3) CoinJoin: It is a method by which different transactions are joined in a single larger transaction. A custodian using a never-before-used address then collects thecoins and distributes them to the intended recipients, based on the senders initiative.
1) Privacy: Undoubtedly, privacy is the biggest advantage. Users are protected from people who want more information about a cryptocurrency transaction.
2) Financial Security: Companies and governments are constantly after people's financial data. Hence, more and more people are turning to cryptocurrencies as a way to escape this scrutiny. Although Bitcoin and other altcoins offer financial security through decentralization, they do not offer the same financial security as privacy coins, since each transaction is publicly visible on the blockchain.
3) In the same way that cash can be untraceable, privacy coins are untraceable. Since using cash is one of the safest and easiest ways to complete a transaction in person, privacy coins as digital money do so in a decentralized way.
1) Misuse: Perhaps the biggest disadvantage of privacy coins is that they can be used for illegal activities. Not only that, but they can be used to buy illegal goods on the black market. They can also be used to launder money or evade taxes.
2) Government Ban: Due to the possible forms of misuse of privacy coins, some countries have banned their use. When a private currency is banned in the country, its price can drop dramatically. This decline hurts the people who have invested in them.
3) Transaction fees: Since privacy coins have all these additional privacy features that are not normally present in other cryptocurrency blockchains, they also have slightly higher transaction fees.
Privacy is an important aspect of cryptocurrencies due to the large number of hackers looking for potential user slip-ups. Privacy coins have offered a tantalizing glimpse into tota privacy and untraceability.