Secure Deletion ofConfidential DatainConsumer Electronics

Thispaperpresents anefficient securedeletion schemeforFlashmemorystorage likeUSB memory.First, we identify two datadestruction techniques, namely,zero overwriting andblockcleaning, andtheir cost-benefit modelson Flashmemorystorage. Then,wepropose ahybrid schemethat applies oneofthembasedontheir coststhatvarywithdata arrangement on Flashmemory.Our implementation and experiments showthattheproposed hybrid schemeimproves confidentiality ofsensitive datawithlowoverheads.