A first station, comprising: an integrated chip; and means for secure non-volatile data storage, the means for secure non-volatile data storage being separate from the integrated chip and operable by an authenticated trust means of the integrated chip to store an encrypted station identifier; and the integrated chip including: an integrated processor; an integrated data store for storing the cryptographic data, the integrated data store including identifier flag means for indicating whether a station identifier has been written to the secure non-volatile data store; an authenticated operating system means (216, 218) comprising: means (208, 216) for encrypting a station identifier, supplied to the integrated chip during a set-up procedure, using cryptographic data stored in the integrated data store; means for irreversibly setting the identifier flag after an encrypted station identifier is written to the secure non-volatile data store; and authenticated trust means, as a software element of the authenticated operating system, the authenticated trust means configured to: allow the encrypted station identifier to be written to the secure non-volatile data store when the identifier flag means indicates that an identifier has not been written to the secure non-volatile data store; and prohibit writing of the encrypted station identifier to the secure non-volatile data store when the identifier flag means indicates that an identifier has been written to the secure non-volatile data store; an integrated chip; and means for secure non-volatile data storage, the means for secure non-volatile data storage being separate from the integrated chip and operable by an authenticated trust means of the integrated chip to store an encrypted station identifier; and the integrated chip including: an integrated processor; an integrated data store for storing the cryptographic data, the integrated data store including identifier flag means for indicating whether a station identifier has been written to the secure non-volatile data store; an authenticated operating system means (216, 218) comprising: means (208, 216) for encrypting a station identifier, supplied to the integrated chip during a set-up procedure, using cryptographic data stored in the integrated data store; means for irreversibly setting the identifier flag after an encrypted station identifier is written to the secure non-volatile data store; and authenticated trust means, as a software element of the authenticated operating system, the authenticated trust means configured to: allow the encrypted station identifier to be written to the secure non-volatile data store when the identifier flag means indicates that an identifier has not been written to the secure non-volatile data store; and prohibit writing of the encrypted station identifier to the secure non-volatile data store when the identifier flag means indicates that an identifier has been written to the secure non-volatile data store; an integrated processor; an integrated data store for storing the cryptographic data, the integrated data store including identifier flag means for indicating whether a station identifier has been written to the secure non-volatile data store; an authenticated operating system means (216, 218) comprising: means (208, 216) for encrypting a station identifier, supplied to the integrated chip during a set-up procedure, using cryptographic data stored in the integrated data store; means for irreversibly setting the identifier flag after an encrypted station identifier is written to the secure non-volatile data store; and authenticated trust means, as a software element of the authenticated operating system, the authenticated trust means configured to: allow the encrypted station identifier to be written to the secure non-volatile data store when the identifier flag means indicates that an identifier has not been written to the secure non-volatile data store; and prohibit writing of the encrypted station identifier to the secure non-volatile data store when the identifier flag means indicates that an identifier has been written to the secure non-volatile data store; means (208, 216) for encrypting a station identifier, supplied to the integrated chip during a set-up procedure, using cryptographic data stored in the integrated data store; means for irreversibly setting the identifier flag after an encrypted station identifier is written to the secure non-volatile data store; and authenticated trust means, as a software element of the authenticated operating system, the authenticated trust means configured to: allow the encrypted station identifier to be written to the secure non-volatile data store when the identifier flag means indicates that an identifier has not been written to the secure non-volatile data store; and prohibit writing of the encrypted station identifier to the secure non-volatile data store when the identifier flag means indicates that an identifier has been written to the secure non-volatile data store; allow the encrypted station identifier to be written to the secure non-volatile data store when the identifier flag means indicates that an identifier has not been written to the secure non-volatile data store; and prohibit writing of the encrypted station identifier to the secure non-volatile data store when the identifier flag means indicates that an identifier has been written to the secure non-volatile data store;