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Jacob Ginsberg , senior director at Echoworx , an expert in end - to - end messaging encryption , said : “ The fact that Facebook has known about this vulnerability since April is doubly damming .
 Jacob Ginsberg: discoverer; Echoworx: discoverer; senior director: discoverer
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:
 Jacob Ginsberg: discoverer; Echoworx: discoverer; senior director: discoverer