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Otsingule "antidetection" leiti 1 fail

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TheCodeBreakers

They had been caught misapplying the talent to one- and ten- dollar bills, pasting one half of the tens to one half of the ones and passing them with the ten-dollar side up. The method is more an art than a science, for if the sudden tear is not done just right, the paper will shred. To read the message, the paper must be resplit, but it comes apart much more easily the second time. Another antidetection measure was transfer. German agents would write their message in invisible ink on one sheet of paper, then press this tightly against another sheet. Moisture in the air would carry some of the ink to the second sheet without the telltale differential wetting of the fiber papers on which the iodine test relied. This compelled T.O.D. to find the specific reagent required. Perhaps the most interesting development of the secret-ink war w...

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