Improving Network-Based Industrial Automation Data Protocols
Source: Linux Journal - Posted by Eric Lubow   
Security Projects A header that includes a unique magic key allows a receiver to detect if the message is known. This header may also include a data length to allow TCP packet segregation and possibly even a simple checksum to validate the encapsulated . . . A header that includes a unique magic key allows a receiver to detect if the message is known. This header may also include a data length to allow TCP packet segregation and possibly even a simple checksum to validate the encapsulated data. If there are concerns that sensitive automation data is being sniffed, a sockets encryption layer may also be provided. This will add additional overhead to the packet processing. As embedded processors become more powerful, it's likely that this will become a standard feature.

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