Key device, authentication device, authentication system, method for releasing a vehicle and computer-readable storage medium

摘要

Previously used wireless keys have disadvantages. It is therefore intended to provide a key device (20), in particular for a vehicle (10), comprising: a key transmitting device (23) which is designed to: - a key data signal (31), in particular to the vehicle (10) to send, the key data signal (31) encoding a key data sequence (30); and - transmitting an acknowledgment data signal (41), in particular to the vehicle (10), wherein the acknowledgment data signal (41) codes an acknowledgment data record (40), a key calculator (21) being adapted to transmit the acknowledgment data signal (41). 41) using a spreading technique.