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A comment on One-Time Pad reinvented to make electronic copying impossible. Parent comment

Re:One-Time Pad reinvented to make electronic copying imposs... by _red on Tuesday May 21, 2013 @05:01AM (#5742545)
Correct, I can't see the practical use of this.

If Alice and Bob must have a secure method to jointly compute K(A) ⊕ K(B), then why wouldn't then use that same method to just exchange the data?

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Re:One-Time Pad reinvented to make electronic copying imposs... by dsr_ on Tuesday May 21, 2013 @05:44AM (#5742671)
At the time of their key-exchange meeting, they don't know what messages they will want to exchange later.
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