| 摘要 |
A method is described of configuring a payment terminal to become usable as a payment terminal shared by a plurality of operators with cryptographic segregation between the different operators of the payment terminal. An operator- and terminal-specific transport key is provided to the payment terminal. An operator- and terminal-specific initial-encryption key is derived, by the payment provider, from an operator-specific base-derivation key using the terminal-identification number, or an additional identification number of the payment terminal. The operator- and terminal-specific initial-encryption key is transmitted to the payment terminal, and is decrypted at the payment terminal. An operator- and transaction-specific encryption key is derived, both at the payment provider and the payment terminal, from the operator- and terminal-specific initial-encryption key using a transaction-specific number associated with this transaction, when performing a transaction with the payment terminal. |
