Patent ID: 8601270

Claim:
A method for the preparation of a chip card for electronic signature services, in which case information is exchanged between a user of the chip card and a signature portal, comprising: associating an asymmetric pair of keys and a signature PIN wherein the asymmetric pair of keys is immediately generated on the chip card by an executable software application on the chip card and the chip card communicates the signature PIN to the user; wherein the user and the user's public key are authenticated by the signature portal with the help of a signature generated by the software application; registering by the software application on the chip card the public key in the signature portal by generating the signature with the private key via a data structure which contains at least the public key, the token and a user identification; sending the signature, the public key and the user identification by the software application to the signature portal by using SMS cellular communication, wherein the cellular number is used as the user identification; uniquely associating the SMS with the user in the signature portal; verifying the signature by the signature portal by means of the token and using the signature as evidence to the signature portal that the user possesses the associated private key; and authenticating the user vis-à-vis the signature portal by the signature via the data structure, which contains the token.