Ext3 users - Nov 2003 - need information regarding the secure deletion of a file in ext3

hai everyone,
             i need information regarding the secure
deletion of a file in ext3
    what is the general overview design  to implement?
what are the functions to be hacked?
 how should i proceed ? what are the data structures
to be changed?
    if there are any useful links in this topic please
send me.

thanks in advance

sudhakar.

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