| 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 ( 1 a) 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 ( 1 b) 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 ( 1 a) of the first network subscriber node ( 1 ); the identification number and the transaction data from first network subscriber nodes ( 1 ) are transmitted (S 1 ,S 2 ; S 1 ') to a third network subscriber node ( 3 ) by means of a third communication network; the validity of the identification number is verified (S 3 ) by the third network subscriber nodes ( 3 ) and an associated service provider node ( 4 c) identifies a plurality of service provider nodes ( 4 a, 4 b, 4 c, 4 d) 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 ( 4 c) via a fourth communication network; credit determined by the transmitted transaction data is reserved by associated service provider nodes ( 4 c) for the second network subscriber nodes ( 2 ) and the reserved credit is confirmed by the associated service provider node ( 4 c) 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 ( 1 b) of the first network subscriber node ( 1 ) via the second communication network; the transmitted transaction number is inputted into the first terminal ( 1 a) of the first network subscriber node ( 1 ) and the input transaction number is transmitted (S 7 ', S 8 ; S 7 ) 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 ( 4 c) is confirmed by the third network subscriber nodes ( 3 ) via the third communication network to the second network subscriber nodes ( 2 ).
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