3223
Cryptographer Tobias Boelter claimed that Facebook and WhatsApp could potentially intercept and read encrypted messages sent within the app .
 ( discover vulnerability: claimed that,  Cryptographer Tobias Boelter: discoverer, intercept and read encrypted messages: capabilities, the app: vulnerable system, Facebook: vulnerable system owner, WhatsApp: vulnerable system owner) 
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: claimed that,  Cryptographer Tobias Boelter: discoverer, intercept and read encrypted messages: capabilities, the app: vulnerable system, Facebook: vulnerable system owner, WhatsApp: vulnerable system owner) 