The authors are entering the multi-core era in computer science. All major high-performance processor manufacturers have integrated at least two cores (processors) on the same chip – and it is predicted that chips with many more cores will become widespread in the near future. As cores on the same chip share the DRAM memory system, multiple programs executing on different cores can interfere with each others’ memory access requests, thereby adversely affecting one another’s performance. In this paper, they demonstrate that current multi-core processors are vulnerable to a new class of Denial of Service (DoS) attacks because the memory system is “Unfairly” shared among multiple cores.