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Besides the validity of the available contact addresses also the reaction time was measured. This information was collected to be used as input for a later discussion on response times . The community would need to define target reaction times, which are regarded to be useful to be used in security incident coordination situations.
Validity of the contact addresses
Assuming that all contacted participants received the challenge mail and understood what action was expected from them we have a 86% success rate, in absolute numbers, 24 participants out of 28 have reacted.