It is possible to solve many kinds of … [p. 708] Two methods (other than recourse to ideal … and confusion. In the method of diffusion the … [the message] which leads to its redundancy is "dissipated" into long range … [p. 709] The method of confusion is to make … [the encrypted message] and the simple description of [the key] a very complex and … To be more precise let us suppose the … which [the enemy] wishes to determine [and thus reduce the search space]. He measures … a set of statistics … [which] are sufficient to determine the [coordinates]. However, in the method of confusion, the equations connecting these …
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