745
Specifically , the duo discovered flaws in the protocol that allowed an attacker to intercept a victim ’s mobile phone calls as well as use a radio antenna to pick up all of a local user ’s phone calls and texts .
 ( discover vulnerability: discovered,  duo: discoverer, flaws: vulnerability, allowed an attacker to intercept a victim ’s mobile phone calls: capabilities) 
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: discovered,  duo: discoverer, flaws: vulnerability, allowed an attacker to intercept a victim ’s mobile phone calls: capabilities) 