A document having - a contactless chip card interface (110, 114) for communicating with a reader on the basis of a request-response transmission protocol and for coupling in electromagnetic energy from the reader in order to supply power to the document, wherein the chip card interface has a first transmission protocol component for sending protocol parameters for initialising the transmission protocol on the basis of the receipt of an initialisation command and a second transmission protocol component for transmitting application data following the initialisation of the transmission protocol with the aid of the protocol parameters, wherein the second transmission protocol component is designed to receive at least one read command for reading application data and to then send a response containing the application data, - a processor for executing the first and second transmission protocol components, a chip card operating system and an application program, - a sensor for outputting a sensor signal for sensing an ambient state, - a volatile memory for storing an enable state for executing the first and second transmission protocol components, wherein the enable state can assume a first logic value and a second logic value, wherein the first logic value indicates disablement of the execution of the first and/or second transmission protocol components and the second logic value indicates enablement for execution of the first and second transmission protocol components, wherein the enable state initially has the first logic value, - a non-volatile memory, in which application data containing at least one attribute of a user associated with the document are stored, wherein the chip card operating system is designed to receive the sensor signal and, on the basis of the receipt of the sensor signal, to store the second logic value of the enable state in the volatile memory, wherein the application program implements a cryptographic protocol, so that, on the basis of a read command for reading the attribute, a response containing the attribute is produced, and sent with the aid of the second transmission protocol component, only if the cryptographic protocol has been performed successfully beforehand and if the second logic value of the enable state is stored in the volatile memory. - a contactless chip card interface (110, 114) for communicating with a reader on the basis of a request-response transmission protocol and for coupling in electromagnetic energy from the reader in order to supply power to the document, wherein the chip card interface has a first transmission protocol component for sending protocol parameters for initialising the transmission protocol on the basis of the receipt of an initialisation command and a second transmission protocol component for transmitting application data following the initialisation of the transmission protocol with the aid of the protocol parameters, wherein the second transmission protocol component is designed to receive at least one read command for reading application data and to then send a response containing the application data, - a processor for executing the first and second transmission protocol components, a chip card operating system and an application program, - a sensor for outputting a sensor signal for sensing an ambient state, - a volatile memory for storing an enable state for executing the first and second transmission protocol components, wherein the enable state can assume a first logic value and a second logic value, wherein the first logic value indicates disablement of the execution of the first and/or second transmission protocol components and the second logic value indicates enablement for execution of the first and second transmission protocol components, wherein the enable state initially has the first logic value, - a non-volatile memory, in which application data containing at least one attribute of a user associated with the document are stored,