Banknote with processor

A banknote comprising:

• a security element having a processor,
• a memory with program instructions,
• a communication interface configured to communicate with a terminal, and
• one or more sensors configured to monitor a state of the security element for manipulation,
• wherein the memory comprises a protected memory area accessible only through cryptographically authorized access,
• wherein an identification number of the banknote is stored in the memory of the security element and identifies an anonymous banknote account managed by a central bank issuing the banknote and individually assigned to a corresponding banknote, wherein the identification number is a banknote account number of the anonymous banknote account individually assigned to the banknote, wherein a banknote-specific cryptographic key is stored in the protected memory area of the memory of the security element,
• wherein the memory storing the program instructions that, when executed by the processor, cause the processor to perform a payment method comprising
• receiving a payment request for a payment with the banknote, wherein the payment request specifies an amount to be paid,
• comparing the amount to be paid with a current nominal value of the banknote stored in the memory of the security element, wherein the comparing further comprises determining the stored current nominal value is greater than or equal to the amount to be paid,
• in response to the comparing, generating a payment-specific cryptogram for authorizing the payment with the banknote, wherein the payment-specific cryptogram authorizes a transaction in which the amount to be paid is transferred from the anonymous banknote account of the banknote to an account of a recipient, wherein the payment-specific cryptogram is generated from the identification number of the banknote and a payment-specific code as input values using the banknote-specific cryptographic key, wherein the amount to be paid is used as an additional input value for generating the payment-specified cryptogram, and
• sending a payment authorization comprising the payment-specific cryptogram, and
• wherein the payment-specific cryptogram is transmitted via the communication interface to the terminal for forwarding to the central bank for cryptographic verification and execution.