3402
Boelter later told The Guardian the “ backdoor ” gave WhatsApp the ability to read messages because of the way the company had implemented its end - to - end encryption protocol .
 ( discover vulnerability: told,  gave WhatsApp the ability to read messages: capabilities, the “ backdoor ”: vulnerability, Boelter: discoverer) 
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:
 ( discover vulnerability: told,  gave WhatsApp the ability to read messages: capabilities, the “ backdoor ”: vulnerability, Boelter: discoverer) 