Key, lock, and locking system

A key, comprising:

• a key head;
• and a key shank (10),
• characterized in that
• the key shank (10) includes a first section that is adjacent to the key head and a torsion section (20) that adjoins the first section and is formed, in particular cold formed, along a longitudinal axis (L) at least in sections, wherein the key shank (10) includes a base cross-section (26) in a transition portion to the torsion section (20), wherein a cross-section (30) of the key shank (10) protrudes at least in sections beyond the base cross-section (26) in the torsion section (20) in a direction towards the key tip (70),
• wherein the key shank (10) includes at least one profile element (22) that is configured as a longitudinal groove, wherein the profile element (22) also includes a torsion in the torsion section (20),
• wherein the key tip (70) is formed as a portion of the torsion section (20) and is continuously twisted about the longitudinal axis (L) of the key shank, and
• wherein the key tip (70) is not congruent to the first section of the key shank.