dye

Split the file into N piece, put them in N different place.  N/2 of the places is remember by you, the other N/2 places is remember by your partner.

In order to get the content, they will need to have all the pieces togather, which means bot of you will have to leak the information out.

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There is a perfect secrecy by using one time pad.  Just that it is not feasible.  Please pray to your local God for assistance.

http://en.wikipedia.org/wiki/One_time_pad

dye

沙兄，說易行難呀。

心照便行了，不好嗎？

小弟小時副修CRYTOGRAPHY，要知

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If you have infinite resources and time, anything is possible.  (In short, are you God?)

Do you have infinite amount of those?  No?  Then we have to make trade-off.  (And this is where skills comes in)

[ 本帖最後由 dye 於 2008-3-3 16:23 編輯 ]