Method for proof of transaction

1. A method for proof of transactions in a digital network, especially on the internet, where the acceptance of a bid presented via a bid server comprises:

a) a digital form is requested from the bid server by a customer's computer connected to the network,

b) the digital form is transmitted from the bid server to the customer's computer and

c) form data which comprises the data required for acceptance of the bid, are sent to an order acceptance server, wherein

d) the form sent from the bid server to the customer's computer contains the network address of a transaction proof server,

e) the form data are sent from the customer's computer to the transaction proof server,

f) the form data are provided with a digital time specification,

g) at least one check digit code is generated for the form data and the digital time specification, and this check digit code is encoded with a key to create a time signature, and

h) the form data are transmitted from the transaction proof server together with the digital time specification and the time signature to the order acceptance server.

2. The method according to claim 1 , wherein the digital form sent from the bid server to the customer's computer contains the network address of the order acceptance server.

3. The method according to claim 1 , wherein the form data, before being sent to the transaction proof server, is provided with a digital signature which identifies the customer.

4. The method according to claim 3 , wherein the form data are only released for transmission to the transaction proof server if the form data contain the digital signature which identifies the customer.

5. The method according to claim 4 , wherein the transaction proof server checks whether the form data is provided with an error-free digital signature of the customer and the form data is sent back to the customer's computer if the digital signature is missing or there is an error in this signature.

6. The method according to claims 3 , wherein the transaction proof server checks whether the customer or a certificate contained in the digital signature which identifies the customer, is contained in a customer data bank.

7. The method according to claim 1 , wherein the transaction proof server provides the form data with a signature which identifies the transaction proof server.

8. The method according to claim 1 , wherein the transaction proof server redirects the form data to a certification server which generates a time stamp certificate as a time signature for the form data and sends the time stamp certificate back to the transaction proof server.

9. The method according to claim 1 , wherein the data transmitted to the order acceptance server is stored in the network such that it is accessible for the customer.

10. The method according to claim 1 , wherein the data transferred to the order acceptance server is also transmitted to the customer's computer.

11. The method according to claim 1 , wherein the order acceptance server transmits a confirmation of the receipt of the form data to the transaction proof server and the transaction proof server redirects the confirmation to the customer's computer.

12. The method according to claim 2 , wherein the form data, before being sent to the transaction proof server, is provided with a digital signature which identifies the customer.

13. The method according to claim 3 , wherein the transaction proof server checks whether the form data is provided with an error-free digital signature of the customer and the form data is sent back to the customer's computer if the digital signature is at least one of missing and there is an error in this signature.

14. The method according to claim 4 , wherein the transaction proof server checks whether the customer or a certificate contained in the digital signature which identifies the customer, is contained in a customer data bank.

15. The method according to claim 5 , wherein the transaction proof server checks whether the customer or a certificate contained in the digital signature which identifies the customer, is contained in a customer data bank.

16. The method according to claim 3 , wherein the transaction proof server provides the form data with a signature which identifies the transaction proof server.

17. The method according to claim 16 , wherein the transaction proof server redirects the form data to a certification server which generates a time stamp certificate as a time signature for the form data and sends the time stamp certificate back to the transaction proof server.

18. The method according to claim 3 , wherein the order acceptance server transmits a confirmation of the receipt of the form data to the transaction proof server and the transaction proof server redirects the confirmation to the customer's computer.

19. A method for proof of transactions in a digital network, especially on the internet, where the acceptance of a bid presented via a bid server comprises:

a) transmitting a digital form from the bid server responsive to a customer request, the form data entered in the form, the form data which comprises the data required for acceptance of the bid, are sent to an order acceptance server, wherein

b) the form sent from the bid server responsive to the customer request containing the network address of a transaction proof server,

c) the transaction proof server via the network address, receiving the form data from a customer, responsive thereto:

d) providing the form data with a digital time specification; and

e) generating at least one check digit code for the form data and the digital time specification, and the check digit code is encoded with a key to create a time signature,

f) transmitting the form data from the transaction proof server together with the digital time specification and the time signature to the order acceptance server.

20. The method according to claim 19 , wherein the form data is provided with a digital signature which uniquely identifies the customer, prior to being received by the transaction proof server.