| 摘要 |
The present invention is concerned with securing messages 100 within a communication network of an industrial process control system, in particular of a substation automation system. Specifically, the present invention relates to a method of and a system for securing messages 100. A multi-block message 100 to be transmitted via a communication network is secured by a block-based authentication, encryption and/or integrity information. Only residue of the previous block 101, 102, 103, 104, 107 in form of block based information is needed to generate the block based information of the next block 101, 102, 103, 104, 107. Therefore, the previous block 101, 102, 103, 104, 107 can already be transmitted while block based information of the next block 101, 102, 103, 104, 107 is generated. This enables on-the-fly authentication of the multi-block message 200 and authentication at an increased rate. |
