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The Turkish - American cryptographer , who identified critical vulnerabilities in Ethereum ’s codebase before its network was hit with the DAO attack , was referring to all the currently 69 active bitcoin forks that could still be exploited with a 51 % attack as their clients might still not have received a patch and are not as secure as bitcoin network due to their smaller size .
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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:
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