While many cryptocurrencies offer a degree of anonymity, some have been specifically designed for the sake of privacy, ensuring that users can conduct transactions without revealing sensitive information. And these crypto projects do enjoy a certain popularity. 

People don't want unknown persons to have information about their personal data, private life and financial situation, and this type of cryptocurrency fulfils that need for privacy. Many users believe that the best platform for them is one that offers anonymous cryptocurrency alongside other benefits. This article examines the leading anonymous crypto assets available today, highlighting the top cryptocurrencies that prioritise user anonymity and transaction confidentiality.

What makes a cryptocurrency private and anonymous?

Private and anonymous cryptocurrencies are crypto assets that prioritise user privacy by employing various techniques to protect transactional data. These cryptocurrencies aim to shield users' identities, transaction amounts, and other sensitive information from prying eyes.

Key features of privacy-focused cryptocurrencies

To be considered private, a crypto asset must have several key features:

1. Encryption. Encryption is a fundamental component of privacy-focused cryptocurrencies. It ensures that data, including transaction details and user information, is protected from unauthorised access.
2. Decentralisation. Decentralisation is a core principle of cryptocurrencies, and it plays a critical role in privacy-focused ones. A decentralised network lacks a central authority, which reduces the risk of data breaches and censorship.
3. Transaction obfuscation. Transaction obfuscation techniques are used to make it difficult for outsiders to trace the flow of transactions.

Privacy-focused cryptocurrencies may also have other features that enhance the security and anonymity of their users, but these features are the bare minimum necessary for a cryptocurrency to be considered private.

Privacy technologies

Private cryptocurrencies employ various technologies to ensure the anonymity and confidentiality of their users. Here are some of the most prominent ones:

• Ring signatures. Ring signatures are cryptographic signatures that can be performed by any member of a group, which makes it difficult to determine which member actually signed the transaction. This method provides anonymity by ensuring that the identity of the signer is hidden among a group of possible signers. Monero (XMR) is a well-known cryptocurrency that uses ring signatures.
• Stealth addresses. Stealth addresses allow the sender to generate a one-time address for each transaction on behalf of the recipient. This ensures that the recipient's public address is not revealed on the blockchain, preventing linkage between transactions and the recipient.
• Zero-knowledge proofs (ZKPs). Zero-knowledge proofs are cryptographic methods that enable one party to prove to another that a statement is true without revealing any additional information. A specific implementation, zk-SNARKs (Zero-Knowledge Succinct Non-Interactive Argument of Knowledge), is used by Zcash (ZEC) to allow fully private transactions where the sender, recipient, and transaction amount are all concealed.
• CoinJoin. CoinJoin is a method of combining multiple transactions from multiple users into a single transaction, which makes it difficult to determine which inputs and outputs belong to which user.
• TOR integration. The Onion Router (TOR) network routes internet traffic through a series of volunteer-operated servers to mask the user's IP address and location. Some privacy-focused cryptocurrencies integrate TOR to anonymise the network layer of transactions and make it difficult to trace the user's internet activity.
• Dandelion++. Dandelion++ is a privacy-enhancing protocol designed to obfuscate the origin of transactions. It spreads transactions through the network in a way that makes it difficult to determine their source.

Top cryptocurrencies for privacy and anonymity

The selection of private cryptocurrencies is quite broad. So, let's take a look at the most popular private altcoins out there.

Monero (XMR)

Monero has established itself as one of the most well-known privacy-focused cryptocurrencies. Since its inception, Monero has consistently prioritised user privacy and anonymity, making it a go-to choice for those seeking enhanced transactional privacy. Monero's commitment to privacy has attracted a dedicated user base and a strong community of developers and enthusiasts.

Monero is probably the most anonymous crypto coin at the moment. The developers of this cryptocurrency are routinely integrating new technologies that enhance the privacy of its users. Ring signatures, stealth addresses, Dandelion++ – all these technologies make tracing transactions in this cryptocurrency virtually impossible.

Alas, such a high degree of privacy cannot but have a downside. Transactions on the Monero network are relatively slow, and this high level of anonymity inevitably draws the attention of authorities and financial regulators to this cryptocurrency.

Key statistics (as of 25 June 2024):

• Price: $162.12
• Market cap: $2,989,867,530

Zcash (ZEC)

Zcash has emerged as a prominent player in the privacy-focused cryptocurrency space, offering a unique approach to balancing privacy and transparency.

Zcash's core privacy feature lies in its shielded transactions, which utilise zk-SNARKs technology. Zk-SNARKs enable users to verify transactions without revealing any additional information, ensuring the privacy of transaction details.

Zcash offers both transparent and shielded transactions, which allow users to choose the level of privacy they desire. Transparent transactions, similar to those in other cryptocurrencies, are publicly visible on the blockchain, while shielded transactions provide enhanced privacy by obscuring transaction details. This dual approach gives users the flexibility to choose between transparent transactions for auditability and shielded transactions for privacy.

Key statistics (as of 25 June 2024):

• Price: $20.29
• Market cap: $330,549,527

Dash (DASH)

Dash (DASH) is a cryptocurrency that combines the benefits of privacy and speed.

Dash's PrivateSend feature, also known as CoinJoin, enables users to mix their transactions with those of other users, making it difficult to trace the origin or destination of funds. By doing so, PrivateSend effectively obscures transaction details, providing users with enhanced privacy. This private feature is optional, and transactions are not private by default.

It should be noted that many critics do not consider the coin to be highly private, pointing to the presence of masternodes in the transaction process that have access to sender and recipient information.

Key statistics (as of 25 June 2024):

• Price: $24.28
• Market cap: $287,844,577

Verge (XVG)

Verge cryptocurrency has a mechanism for hiding private data that is distinctive from its competitors. Verge integrates with both Tor (The Onion Router) and I2P (Invisible Internet Project) networks, enabling users to route their transactions through multiple nodes, preventing the origin or destination of funds from being traced. In addition, Verge uses a stealth address system that generates a unique address for each transaction, making it very difficult to link transactions to a specific user. As with Zcash and Dash, transaction anonymity on the Verge network is optional.

Additionally, Verge's low transaction fees and relatively fast confirmation times make it an attractive option for everyday transactions. It's worth noting that Verge had previously encountered some security issues that were later resolved. In addition, some critics question the effectiveness of the Tor and I2P protocols in providing complete anonymity.

Key statistics (as of 25 June 2024):

• Price: $0.0043
• Market cap: $71,085,800

PIVX (PIVX)

PIVX, which stands for Private Instant Verified Transaction, is a privacy-focused cryptocurrency that aims to provide fast, secure, and private transactions. PIVX employs zk-SNARKs technology, which allows users to prove the validity of a transaction without revealing any additional information.

It's a decentralised open-source project managed and developed by a community-driven decentralised autonomous organisation (DAO). Beyond privacy, PIVX prioritises speed and scalability in an effort to provide users with a seamless and efficient experience.

Key statistics (as of 25 June 2024):

• Price: $0.2657
• Market cap: $22,248,136

Decred (DCR)

Decred (DCR) is a cryptocurrency with a hybrid consensus mechanism that combines proof-of-work (PoW) and proof-of-stake (PoS) mechanisms. To ensure transaction anonymity, Decred uses its own mixing protocol called CoinShuffle++ (CSPP) to create CoinJoin transactions. This process allows the creation of untraceable transactions, but the amounts remain publicly visible and auditable to ensure there is no hidden inflation.

Decred's architecture is designed to be scalable and flexible. It supports the Lightning Network, a second-layer solution that enables faster and cheaper transactions.

Key statistics (as of 25 June 2024):

• Price: $15.68
• Market cap: $253,207,880

Potential risks and considerations

While privacy-focused cryptocurrencies offer significant benefits in terms of privacy and security, it's important to consider potential risks before investing in these crypto assets.

• Legal and regulatory risks. Privacy cryptocurrencies often face intense scrutiny from regulators. Different countries have adopted varied stances on privacy-focused cryptocurrencies. Some countries have outright banned or heavily restricted the use of privacy coins, which has made it difficult for users to use these cryptocurrencies. Exchanges may be forced to delist privacy-focused cryptocurrencies to comply with local regulations.
• Scalability issues. Privacy technologies often introduce additional computational complexity that impacts the scalability and performance of the network. Techniques like confidential transactions and ring signatures can increase transaction sizes, leading to higher storage and bandwidth requirements. Furthermore, the additional processing required for privacy features can result in slower transaction speeds and affect the user experience.
• Limited adoption. Due to regulatory pressures, many exchanges are hesitant to list privacy coins, which limits users' ability to buy, sell, and trade these assets. In addition, fewer merchants accept privacy coins compared to more mainstream cryptocurrencies like Bitcoin and Ethereum, limiting their utility in everyday transactions.