| 摘要 |
An access identification and control device, especially suitable for being used for all those applications wherein the use of an apparatus or a service must be allowed only to the users that have the requirements imposed by the apparatus/service itself or if a check must be carried out on an apparatus or service, including at least one fixed part or reader (2) and at least one mobile part or transponder (50) that can communicate with each other in both directions, low power radio transmitters for carrying out the communication, a two-way radio antenna or element (24) defined by the body of a user that constitutes an extension of the receiving antenna in the communication between fixed part and mobile part, the device wherein the fixed part (2) and the mobile part (50) include communication elements defined by data ciphering algorithms and ciphering keys not known beforehand, each time different and suitable for identifying the mobile part (50) only if the same has been previously stored to the reader or fixed part (2). |
