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The Internet of Things ( IoT ) is placing an unprecedented number of unsecured devices on the Internet every day that are being leveraged by hackers to steal data and to launch Denial of Service Attacks ( DDoS ) .
 ( data breach: steal,  hackers: attacker, data: compromised data, launch Denial of Service Attacks ( DDoS ): purpose) 
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: steal,  hackers: attacker, data: compromised data, launch Denial of Service Attacks ( DDoS ): purpose) 