Access management device for objects, consisting of a management centre , at least one buffer storage medium and at least one apparatus for evaluating access information and controlling an access door , wherein the management centre comprises a computer which generates access information from a fixed person-related part and a variable time-related part and transfers said access information to the buffer storage medium , and in that the apparatus for evaluating access information comprises a computer which is not connected to the management centre , has a clock and controls unlocking of the access door using the access information that is read from the buffer storage medium and compared with a time specification of the clock , wherein the access management device is designed such that the computer of the management centre , by encrypting with an encryption algorithm, generates an item of check information from the access information and further additional information, which is not transferred and contains group or fleet details in order to divide the access authorizations into further variants, and also transfers said item of check information to the buffer storage medium or to a separate buffer storage medium, and the computer of the apparatus for evaluating access information generates variants of comparative information from the access information read from the buffer storage medium and internal stored variants of additional information by encrypting with the same encryption algorithm and compares said variants of comparative information with the item of check information read from the buffer storage medium , and the access door is unlocked only when one of the variants of the comparative information corresponds with the item of check information, wherein, when the access information is generated centrally, person-related, individual access information and a varying time specification are firstly generated and this access information is combined with additional information , and the combination of access information and additional information, together with a fixed key, subsequently undergo an encryption method and as a result an item of check information is generated in the form of a cryptogram or of a checksum additionally ascertained from the cryptogram by a further algorithm, and in that the data delivered to the buffer storage medium consist of the access information and the item of check information , in that for the purposes of evaluation and control the received access information is combined with an item of additional information from a limited amount of possible additional information, in that the combination of access information and additional information, together with the same fixed key, subsequently undergo the same encryption method and in that an item of comparative information ascertained from this encryption method is compared with the item of check information and the current time, and the additional information is evaluated for further control when the item of comparative information corresponds with the item of check information and the current time corresponds with the time contained in the access information, in that when the item of comparative information does not correspond with the item of check information the encryption method is repeated with further variants of the additional information from the limited amount of possible additional information until the item of comparative information does correspond with the item of check information and the access information and the selected additional information are evaluated for further control, or until a complete cycle with various additional information has been run through without success. <EOS>