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Not only the blockchains of cryptocurrencies and exchange houses were the preferred targets for distributed denial of service (DDoS) attacks this year, but in the extortion schemes that usually accompany these attacks, cryptocurrencies are requested as payment demands.

In a recent study of the computer security company Arbor Networks in Mexico, it was achieved that only last October there were 3,100 DDoS attacks in that country, of which more than 50% originated in Mexico itself and its objectives are companies and government institutions.

The DoS are attacks that have a simple principle: to interrupt the access of a network or server to its normal users, generating a flood of access or superfluous information requirements. In the case of Distributed DoS or DDoS attacks, incoming traffic comes from many different sources, which makes it impossible to block all of them.

The latest trend in DDoS is that you do not need to be a hacker or security expert to start an attack, just hire a service from the many available on the web that have been called DDoS as a service. There are even websites that offer a comparative study of the Top 10 stressers, with attack capacity of up to 500 GB / s.

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## THE CRYPT LINK
The cryptocurrencies have been, with greater intensity this year, linked to many cyber attacks, both by the high percentage of intrusions to exchange houses and networks linked to cryptocurrencies, such as the choice of bitcoin and others as means of payment of rescue of the majority of attacks cataloged as ramsomware.

The most recent report of the firm Imperva on DDoS attacks registers that the exchange houses that transact bitcoin represent 80% of the DDoS attacks in the third quarter of this year.

On the other hand, Michael Klatt, VP of Research at DomainTools, predicts that cryptocurrencies will reinforce ramsomware attacks of identity theft. If 2017 is recognized as the year in which those attacks and others related to the request for rescue took off, the trend will continue in 2018, says Klatt.

A report by Carbon Black, of October of this year, records that the ramsonware market grew 2,500% in one year to reach 6 million dollars. While this amount may seem modest, Carbon Black says that there are "Do-It-Yourself" kits of bulk ramsomware on the web, for less than a dollar and with an average price of $ 10.