Locking device for systems access to which is time-restricted

A locking device for objects of use, which are to be used for a particular period of time by a user, the locking device comprising:

• means for unlocking the locking device in response to an opening code;
• and
• means for altering the opening code and issuing a confirmation code in response to an end code, hereby the confirmation code serves as proof of the ending of the use;
• wherein the locking device issues a confirmation code and changes the opening code in response to an end code.

A system for locking objects of use, which are to be used for a particular period of time by al user, comprising:

• a central access control unit;
• and
• at least one locking device;
• wherein the locking device provides a cycle of use in which a locking device provides a request code from which the central access control unit issues an opening code that enables the user to open the locking device;
• and in which the locking device provides a confirmation code upon receipt of an end code and changes the opening code.