Forgery prevention#3

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DominicBreuker wants to merge 9 commits intodevelopfrom

forgery_prevention

Commits on Aug 24, 2015

check for suspicious parameter values
DominicBreuker
committed

Commits on Nov 4, 2015

refactor specs and fix error on circleci
DominicBreuker
committed

Commits on Nov 6, 2015