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Cryptographer Tobias Boelter claimed that Facebook and WhatsApp could potentially intercept and read encrypted messages sent within the app .
 Cryptographer Tobias Boelter: discoverer; intercept and read encrypted messages: capabilities; the app: vulnerable system; Facebook: vulnerable system owner; WhatsApp: vulnerable system owner
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: discover vulnerability 
  Option: vulnerable system owner, vulnerability, capabilities, time, vulnerable system version, discoverer, common vulnerabilities and exposures, supported platform, vulnerable system 
Text: {0} 
Answer:
 Cryptographer Tobias Boelter: discoverer; intercept and read encrypted messages: capabilities; the app: vulnerable system; Facebook: vulnerable system owner; WhatsApp: vulnerable system owner