La palabra Cryptojacking proviene de la unión de las palabras inglesas Cryptography y Hijack, y hace referencia al uso no autorizado del dispositivo de una persona para minar criptomonedas.
It is a technique by which a malicious actor takes advantage of the processing power of your devices to mine cryptocurrencies, I mean, A hacker installs a malicious program on your computer that makes it use your computer’s power to mine cryptocurrencies.
Digital devices, such as your computer or tablet, are a means for decentralized value exchange.
In cryptocurrency exchanges, the network must validate transactions, which requires processing power and energy.
This validation generates a block with the transactions recorded in the ledger. Anyone can set up a farm to mine cryptocurrencies.
Another way to mine cryptocurrencies is by using JavaScript libraries, such as Coinhive, that use the computing power of website visitors for mining.
This allows eliminating advertising and still making profits for the site owner. The problem is that some hackers started using users' pages secretly, in this way these malicious actors take advantage of your computer's power for their own benefit, which will cause your computer to become slower as it is occupied with these tasks. In addition to higher electricity consumption.
To avoid this you should install an extension in your browser to block the JavaScript code that mines cryptocurrency. Use a browser with the feature to block this type of code.
Si sospechas de un sitio usa la herramienta http://whoismining.com para saber si mina sin autorización y bloquea manualmente la URL.