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Hackers use ransomware to encrypt computer files , making them unreadable without a secret key , and then demand digital currency like bitcoin if victims want the files back — and many victims are falling for that promise .
 ransom: demand digital currency
Please tell me event type and its trigger word from given type options. Output format is "type: trigger".  Option: phishing, data breach, ransom, discover vulnerability, patch vulnerability 
Text: {0} 
Answer:
 ransom: demand digital currency