Abstract: An RFID tag can include a transmitting device and a receiving device for transmitting data to and receiving data from a tag reader, and the tag can include a memory for storing identification data unambiguously labeling the RFID tag and circuitry which automatically executes functions depending on the fact that: the reader demonstrates knowledge of an internal password in a memory of the tag; and information stored in the memory of the tag for an internal state permits the execution of the function. The tag also includes circuitry for changing the stored password and/or the internal state, in particular depending on a previous comparison of the internal password to one received from the reader.

Abstract: An RFID tag can include a transmitting device and a receiving device for transmitting data to and receiving data from a tag reader, and the tag can include a memory for storing identification data unambiguously labeling the RFID tag and circuitry which automatically executes functions depending on the fact that: the reader demonstrates knowledge of an internal password in a memory of the tag; and information stored in the memory of the tag for an internal state permits the execution of the function. The tag also includes circuitry for changing the stored password and/or the internal state, in particular depending on a previous comparison of the internal password to one received from the reader.

Abstract: The present invention relates to method of and a computer software product for administering cookies in an Internet client-service system in which cookies are exchanged between a server computer (17) and a client computer (11) via the Internet (16), wherein the return of a cookie, stored in a client computer (11), to the server computer (17) which placed the cookie, is dependent upon a preceding check of the cookie. There is further proposed a client computer (11) for an Internet client-server system, having an interface device for data exchange via the Internet, at least one memory device (13) for storing data objects and an administration means for administering cookies, wherein the administration means (14) sends a cookie stored in the memory device (13) back to the server computer (17) which placed the cookie, in dependence upon a preceding checking.