File photo of people shopping at Target store during Black Friday sales in the Brooklyn borough of New YorkBy means of Jim Finkle and Mark Hosenball BOSTON/WASHINGTON (Reuters) – Target Corp and Neiman Marcus are not the only U.S. retailers whose networks have been breached over the holiday buying season ultimate 12 months, in line with sources aware of assaults on different retailers that have yet to be publicly disclosed. Smaller breaches on as a minimum three different well-recognized U.S. retailers happened and were performed using similar techniques as the one on Goal, in keeping with the folks aware of the assaults. Only one well-recognized retailer, Neiman Marcus, has said that they too had been sufferer of a cyber attack given that Goal's December 19 disclosure that some forty million cost card numbers had been stolen in a cyber attack. On Friday, Target mentioned the information breach was once worse than originally concept.