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I think you (unintentionally?) are proving the OP right. Because it's far easier to swallow and poop out a plastic bag with a microSD card in it than it is to put a piece of paper in your carry-on.</sarcasm>

Plus--wouldn't full-body scanners catch something like this?

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Airport/security full body scanners would not catch something like this. They only image through clothing for the most part. They only image through the top layers of skin. See figure 4 in the linked to document:

http://www.tek84.com/downloads/Holt-Letter2010-12-2.pdf

It depends on the amount of information you want to transfer, and how likely it is that you'll get a full customs inspection. A single microSD card can hold 512 GB of data; try bringing that in paper format through customs.

Obviously this technology is not for bringing Terabytes of information with you. But you can put an awful lot of information in .txt format and something like 3 megabytes.

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