| 摘要 |
The invention relates to a method and a system for distributing a content item, which has been divided into a plurality of blocks of data. A control unit creates at least one watermark block. This watermark block is unique for the client and the content item to be distributed and is stored in a watermark unit. Before the content item is distributed to the client the client will need a ticket in order to verify himself when connecting to other clients. The clients can, if they have valid tickets, connect to each other and transfer the blocks of data to and from each other. In order for a client to receive a complete content item it also needs to connect to the watermark unit in order to obtain the at least one watermark block that makes the content item complete.
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