| 摘要 |
The invention relates to an arrangement for adapting a mobile field device to a use. According to the invention, a field mobile terminal, such as a PDA, is adapted to a use. The mobile terminal is provided with data, which is divided into several parts. Each part concerns encrypted data connected to a certain area Decryption keys are in a spe-cial server. When the decryption of the part is needed, the server finds out the location of the mobile terminal. If the location information of the mobile terminal and the location information of one of said decryption keys match, the de-cryption key is sent from the server to the mobile terminal. The mobile terminal may now decrypt the data part in question for adapting the terminal for the use.
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