Secret code in letter ink unlocks text of The Wonderful Wizard of Oz | New Scientist | Scooploop

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Secret code in letter ink unlocks text of The Wonderful Wizard of Oz

Ink laced with molecules that can store data has been used to write a letter containing a hidden, encoded message – the encryption key to un..
https://www.newscientist.com/article/2329621-secret-code-in-letter-ink-unlocks-text-of-the-wonderful-wizard-of-oz/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home

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