Method for arranging emergency access to a device secured using a security circuit where a time or distance limited authentication is provided to a lock service company who can then access the device, e.g. a motor vehicle

摘要

Method for arranging emergency access to a device secured using a security circuit in which: a time limited identification for a key medium is stored (3) in a central control point (1); the safety circuit is released by transfer (5) of the identification from the key medium to the security circuit; the identification is stored in the security circuit and used to block a new release with the same identification; and deactivation of the release when a counter event starts.