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The use of email as an authentication measure made it easier for phishers to mass harvest credentials for all email services on a single phishing site , instead of having to target email providers individually , Hassold says .
 ( data breach: harvest,  phishers: attacker, The use of email as an authentication measure: attack pattern, credentials: compromised data, all email services: victim, a single phishing site: tool) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: phishing, data breach, ransom, discover vulnerability, patch vulnerability, Arguments type: vulnerable system, capabilities, vulnerability, number of victim, issues addressed, compromised data, damage amount, common vulnerabilities and exposures, victim, patch number, number of data, tool, discoverer, time, purpose, place, payment method, releaser, vulnerable system version, attacker, supported platform, patch, price, vulnerable system owner, trusted entity, attack pattern. 
Text: {0} 
Answer:
 ( data breach: harvest,  phishers: attacker, The use of email as an authentication measure: attack pattern, credentials: compromised data, all email services: victim, a single phishing site: tool) 