| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide methods, apparatus, software and systems for securely erasing data from a memory card. <P>SOLUTION: A number of hidden spare blocks of memory in an inaccessible region of each memory bank is determined. A block of memory is repeatedly overwritten using a data pattern in each memory bank up to the number of hidden spare blocks in one embodiment. A block of memory is repeatedly erased in each memory bank up to the number of hidden spare blocks in another embodiment. The blocks of memory in the accessible region of each memory bank are erased or overwritten using the data pattern. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
