yep, but most are on RS-232 serial but only for a few feet of cable before they take a long ride on frame relay or vsat
- posted
20 years ago
> looks like quite a bit of interest in this technology by the few who still
> > use rs-232 serial comms
>
> There are actually quite a lot of people still using RS232 and will be for
> the forseeable and unforseeable future.. there is simply no better, cheaper,
> method of point-to-point comms.
>
> > do a google search on "aga 12" or "aga 12-1"
> > or "clay weston"
> >
> > AGA 12-1 provides a cryptographic protocol and hardware specification to > be
> > used by gas, water and electric SCADA system operators to secure
> > communications between remote units and masters -- areas defined by the
> > President's February 14, 2003 report entitled, "The National Strategy to
> > Secure Cyberspace," as prime targets for terrorism. Rainbow Mykotronx, one
> > of the key participants on the AGA 12-1 working group, is currently
> > developing products in compliance with the new AGA 12-1 report. (Photo:
> >
formatting link
)
>
> I guess there is a need for this gear for the amazingly paranoid - but then
> that seems to be the world we live in...
>
> The nature of RS232 SCADA comms is that it is very difficult to "tap into"
> without knocking it out long enough to raise alarms - but even if you did,
> you still need to *at least* have access to the correct cabling (not just
> any old phone line), know which protocol(s) are in use and know the address
> of the station(s) you are trying to access, before you can attempt to get
> anywhere - basically you need access to the design documentation. >
> IMHO, the Utilities in question would be better advised to spend their money
> securing their design and operations documentation rather than encrypting
> their comms. Choosing some obscure un-supported multi-master/multi-slave
> comms protocol should be more than adequate "encryption".
>
> Cameron:-)
>
>
>