| 摘要 |
The invention relates to a method for carrying out an electronic transaction according to the following steps: Data exchange between a first network subscriber node (1) and a second network subscriber node (2) is carried out by a first terminal (1a) of the first network subscriber node (1) via a first communication network in order to determine transaction data of the transaction; an identification number of a second end device (1b) of the first network subscriber node (1) is inputted into a second communication network, which is different from the first, by means of a first network subscriber node (1) in the first terminal (1a) of the first network subscriber node (1); the identification number and the transaction data from first network subscriber nodes (1) are transmitted (S1, S2; S1′) to a third network subscriber node (3) by means of a third communication network; the validity of the identification number is verified (S3) by the third network subscriber nodes (3) and an associated service provider node (4c) identifies a plurality of service provider nodes (4a, 4b, 4c, 4d) registered by the third network subscriber nodes (3); the verified identification number and the transaction data of the third network subscriber nodes (3) are transmitted to the associated service provider nodes (4c) via a fourth communication network; credit determined by the transmitted transaction data is reserved by associated service provider nodes (4c) for the second network subscriber nodes (2) and the reserved credit is confirmed by the associated service provider node (4c) to the third network subscriber nodes (3) via the fourth communication network; a transaction number is produced and is transmitted from the third network subscriber nodes (3) to the second terminal (1b) of the first network subscriber node (1) via the second communication network; the transmitted transaction number is inputted into the first terminal (1a) of the first network subscriber node (1) and the input transaction number is transmitted (S7′, S8; S7) to the third network subscriber nodes (3) via the third communication network; the transmitted transaction number is verified by the third network subscriber nodes (3) by comparing the previously produced transaction number with the third network subscriber nodes; and the credit reserved by the associated service provider nodes (4c) is confirmed by the third network subscriber nodes (3) via the third communication network to the second network subscriber nodes (2). |
