An arrangement for a lock is provided, comprising a stator, a rotor, which is rotatably arranged in the stator, and a set of elements arranged in the rotor for cooperating with the stator, which elements each have an opening and which elements are arranged successively in the longitudinal direction of the rotor and the openings of which together form a through hole for receiving a key, each of the elements being readjustably arranged, independently of each other, between a state which upon actuation is blocking and a state which upon the same actuation is releasing. The disclosure further concerns a key, which has a body along which a plurality of projections are arranged, the plurality of projections all being arranged in a common plane and the plurality of projections all having the same height and defining together the profile of the key.

A bridge tumbler lock has tumblers that both slide and pivot, with their motion controlled by pairs of key interfaces. A sidebar is released to permit lock opening movement when all tumblers are in their correct positions. This results in a lock that is resistant to release of information due to partially correct key combinations occurring in the course of a lock picking attempt and thus enables enhanced security in an economical, effective lock construction.