Double-sided button with a tough function

A smart card comprising:

• at least one push-button, the push button comprising:
• a first switch contact and a second switch contact which are arranged spaced apart and parallel to each other,
• wherein the first switch contact is designed for approaching the second switch contact until the first switch contact touches the latter and for establishing an electrical line connection to the second switch contact when force is applied,
• wherein:
• the push-button comprises a third switch contact which is arranged spaced apart from the second switch contact and in parallel on a side opposite to the first switch contact,
• wherein the third switch contact is designed for approaching the second switch contact until the third switch contact touches the latter and for establishing an electrical line connection to the second switch contact when force is applied, and
• an evaluation unit which is designed for additionally operating the first and/or the third switch contact(s) as a capacitive or inductive touch sensor, wherein a card number as well as a plurality of sequence numbers are allocated to the smart card.

A method for transmitting payment information with a smart card comprising:

• at least one push-button, the push-button comprising:
• a first switch contact and a second switch contact which are arranged spaced apart and parallel to each other,
• wherein the first switch contact is designed for approaching the second switch contact until the first switch contact touches the latter and for establishing an electrical line connection to the second switch contact when force is applied,
• wherein:
• the push-button comprises a third switch contact which is arranged spaced apart from the second switch contact and in parallel on a side opposite to the first switch contact, and
• wherein the third switch contact is designed for approaching the second switch contact until the third switch contact touches the latter and for establishing an electrical line connection to the second switch contact when force is applied,
• an evaluation unit which is designed for additionally operating the first and/or the third switch contact(s) as a capacitive or inductive touch sensor, wherein a card number as well as a plurality of sequence numbers are allocated to the smart card, and
• at least one of an identification and transmission device, a secure element, a data memory, a display, an inductive touch sensor as well as a capacitive touch sensor, wherein the identification and transmission device can be connected to a card reading device, which is designed for accessing a payment service provider system, which is designed for accessing a network data storage,
• the method comprising:
• initialization steps comprising:
• allocating, in each case, one sequence number of a card number of the smart card to a credit card number or bank card number, and
• storing of said allocation in the data memory of the smart card as well as in the network data storage, which is accessible via a data network;
• and operation steps including:
• selecting a credit card number or bank card number by a user of the smart card by means of the smart card,
• transmitting the card number of the smart card and of the sequence number allocated to the selected bank card number or credit card number by the identification and transmission device to the card reading device,
• transmitting the card number of the smart card and of the sequence number by the card reading device to the payment service provider system, and
• retrieving the credit card number or bank card number allocated to the transmitted sequence number by the payment service provider system on the network data storage.