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A former ransomware negotiator has pleaded guilty to helping cybercriminals extort companies in cyberattacks.

Angelo Martino, who used to work for cybersecurity firm DigitalMint, admitted to playing both sides of the negotiation in five different incidents.

Martino, who faces up to 20 years in prison, admitted to feeding confidential information back to the operators of the ALPHV/BlackCat ransomware, providing them with information such as the victim's insurance policy limits and their negotiation strategies.

He is the third ransomware negotiator in the past year to face jail for the same scheme.

The U.S. Justice Department announced Martino's guilty plea on Monday.