On Fri, Aug 20, 2004 at 10:26:08AM +0400, 3APA3A ([EMAIL PROTECTED]) wrote: [...] > you state: > > If there is a host with reliable time on the network (that is host > synchronized with some hardware source, like radio clocks, cesium > clocks, GPS clocks, etc) - whole network will be finally, after some > time, synchronized with this host. > > Depending upon the criticality of the time sensitive applications on > the network, you might want to reconsider the use of "radio clocks" > and especially "GPS clocks". These time sources are also subject to > attacks. Any free air broadcast is subject to jamming. This is > essentially a DoS. Spoofing to provide incorrect time signal is also > possible with free air broadcast, but less easy to do. [...]
For a fixed installation detecting if someone is dinking the gps signal is trivial. The unit starts thinking it is not in Kansas anymore. -- Chief Gadgeteer Elegant Innovations _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.netsys.com/full-disclosure-charter.html
