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Monero (cryptocurrency)

Monero (cryptocurrency)

An open-source cryptocurrency focused on privacy of transactions with CryptoNote technology using ring signatures.

Monero was created in April 2014 by seven people, including Riccardo Spagni. The cryptocurrency promotes privacy, decentralization, and scalability. Monero can be run via runs on Windows, MacOS, Linux, Android, and FreeBSD. Monero uses a public ledger called a blockchain to record transactions and Monero coins (XMR) are created through GPU and CPU cryptocurrency mining.


Monero was originally launched on April 18th under the name Bitmonero.


Unlike most cryptocurrencies today, Monero is based on the CryptoNote protocol. The CryptoNote whitepaper was originally written by pseudonymous author Nicolas van Saberhagen in 2012, and updated in 2013. The protocol only allows the approximate amount of a transaction to be known, while the origin, destination, or actual amount remain hidden. Though Monero allows a hidden trace of every transaction made, their users still have the privilege to share certain information selectively. All Monero accounts have their own distinctive view key which allows users to check a specific account’s transactions.

Ring signatures

Monero uses a more complex scheme digital signatures called ring signatures, as opposed to EDSA signatures used by many other blockchains. The ring signatures may contain the public keys of multiple individuals, one real signature and a number of other signatures known as mixins. A transaction or statement signed with a ring signature proves that one of the members of the group provided a private key for the digital signature, however the details on which specific individual provided the digital signature remains impossible to establish.

 Diagram of a Ring signature. Source:

Initially, it was possible for Monero users to trace the amount being transferred while keeping the sender and the receiver hidden. The RingCT update obscured both the value of individual transactions, along with the identity of senders and recipients.

Lack of traceability

Every address for payments in CryptoNote protocol are one time usage. This makes the tracing of the movement of funds through addresses much more difficult. The ambiguity built into the ring signatures means that any member of the ring signature group could be responsible for the transaction, in addition to the one time only use of the transactions, creates a tree structure with extremely high numbers of possible paths the transfer of value could have taken.

Ambiguity in transaction path. Source:
Analysis vulnerabilities

Practical vulnerabilities in the privacy guarantees of Monero transactions have been highlighted by researchers. Taking advantage of Monero's mixin sampling strategy, researchers estimated that traceability analysis would be able to guess the real input from the mixins with approximately 80% accuracy. Prior to Febuary 2017, the Monero protocol allowed users to choose the number of mixins and did not enforce a minimum number, resulting in transactions using 0 mixins which are similar to bitcoin transactions. Thus these transactions, and any transactions which utilize these as mixins do not have robust crypto analysis resistance.


Monero was among the fastest growing cryptocurrencies in 2016, increasing in value by around 2,760 percent.

Acquiring Monero is possible through cryptocurrency exchanges like Poloniex, Bitfinex, Kraken and others. Poloniex was the first cryptocurrency exchanges that offer Monero starting in July 2014.


April 6, 2018
Monero hardforks to version 7

The version 7 hardfork "bricks" or renders obsolete Bitmain's ASIC miners as well as increases ring size from 5 to 7.

April 25, 2014
Monero mainnet is launched

The privacy focused cryptocurrency Monero is launched by core members including Riccardo Spagni. Monero uses the CryptoNote technology and is based on the Bytecoin design.

October 17, 2013
The CryptoNote whitepaper v 2.0 is released

The whitepaper describes the CryptoNote protocol, which describes a blockchain protocol using ring signatures to increase the anonymity of transactions compared to the Bitcoin blockchain.



Further reading


Bitcoin and the Rise of the Cypherpunks

Jameson Lopp

CryptoNote v 2.0

Nicolas van Saberhagen

Drugs, Code and ICOs: Monero's Long Road to Blockchain Respect

Pete Rizzo

Mo-nero, Mo-problems: Defending Monero against temporal analysis

Shashvat Srivastava and Henry Heffan

Monero is Not That Mysterious

Sarang Noether

Documentaries, videos and podcasts






iOS-only wallet for Monero.

JP Richardson

Lincoln, Nebraska, USA

Multicurrency crypto wallet for Windows, Mac, Linux, iOS, and Android. Supports Monero and other cryptocurrencies as well as has an in-app exchange.



Monero Android wallet with ability to pay Bitcoin addresses using integration.



Monero wallet founded in 2014 by Monero developer Riccardo Spagni ("fluffypony") with support for Windows, Mac, Linux, iOS, and web browser.


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