Secret code in letter ink unlocks text of The Wonderful Wiza

Ink laced with molecules that can store data has been used to write a letter containing a hidden, encoded message – the encryption key to unlock a text file of the novel The Wonderful Wizard of Oz

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United Kingdom , Texas , United States , Eric Anslyn , Alan Woodward , Chris Stokel Walker , L Frank Baum , University Of Texas At Austin , University Of Surrey , Wonderful Wizard , Advanced Encryption Standard , Chemistry , Data ,