Rights Amplification in Master-Keyed Mechanical Locks - This paper describes a relatively unknown procedure for obtaining a master key if given access to a tumbler based master keyed lock and any low level key in the system. No special skill or equipment beyond a small number of blank keys and a file is needed, and the attacker does not need to engage in any suspicious behavior at the locks location. Countermeasures are described with provide limited protection under certain circumstances.
562ab51f68cdb767a008ead12ba2e6dff9f5b95fde08373041067c0cc80dbfa9