3399
On Friday , news outlet The Guardian reported that a cryptography researcher had discovered a backdoor in WhatsApp ’s messaging service that could “ allow Facebook and others to intercept and read encrypted messages ” .
 discover vulnerability: reported
Please tell me event type and its trigger word from given type options. Output format is "type: trigger".  Option: phishing, data breach, ransom, discover vulnerability, patch vulnerability 
Text: {0} 
Answer:
 discover vulnerability: reported