11.   A centralized system that could authenticate the origin of all traffic would be useful in tracing the source of an attack, he said.

12.   A more definitive study to trace the sources of the haze is soon to commence.

13.   But a clever programmer can replace the real packet address with a fake one, making it just this side of impossible to trace the source of the data.

14.   But the same information can also be used to help develop treatments or to use genetic fingerprinting to help trace the source of an attack.

15.   By analyzing flu viruses in animals, researchers hoped to trace the source of the genes that mingled with human flu viruses to create such terrifyingly deadly strains.

16.   Cole noted that researchers have traced the sources of all tree stock in the infected orchards and found nothing suspicious.

17.   Further investigation traced the source of the Legionella infections to devices that spray mist on fresh vegetables in supermarkets, not the water towers.

18.   In theory, such logs would help auditors trace the source of an improper disclosure.

19.   Is there any way I can trace the sources?

20.   Investigators from the Suffolk County bias unit and burglary squad dusted for fingerprints and were trying to trace the source of the oily paint, Oster said.