These rules give Member States discretion to decide if investment firms have to recordtelephone conversations or electronic communications involving client orders.
In one instance, hackers also were able to access and secretly record a telephone call between U.S., Irish and other law-enforcement officials, which was later posted on Google Inc.
Sometimes, however, the attacks came from outside groups, as with TV ads in New York criticizing McCain's voting record on clean air, and telephone banks in Michigan and Virginia that made an issue of the senator's stance on abortion.
The system would be modeled on a method used by cellular telephone service providers to warn each other about people who have a poor record of paying their bills.