On 2/22/12 4:38 PM, Dr. David Kirkby wrote:
On the train this morning I picked up a copy of the Metro (there are
usually numerous copies on any train, as its free and does not take long
to read).
There was an article about financial institutions being concerned about
the time of their clocks being purposely altered by GPS manipulation so
someone can gain a trading advantage. I guess if you can make London a
bit slow, then you can determine if stocks have risen/fallen on other
markets and chose to buy or sell based on that fact. I guess you would
need a few seconds if the decisions were made by humans, but perhaps
microseconds would be enough if the decisions were made by computer.
I can't seem to find a copy of the article online.
Funny thing is there was a fictional TV program a week or so ago where
criminals claimed to be delaying supposedly real-time data to gain an
advantage. But in fact they were not in the plot - they just told other
criminals this story.
"The Sting" Robert Redford and Paul Newman... a fine example of how a
bit of time alteration/data delay can work.
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