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University at Buffalo cyber security expert Arun Vishwanath says ransomware attacks have grown exponentially in the last two years , and likens them to Internet extortion .
 ransom: ransomware attacks
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: ransomware attacks