Mark Wieczorek

This is pretty cool. By using the yellow spectrum, which people don’t see very well but cameras can pick up just fine, they’ve managed to embed a few bits of data (about as much as a bar code - enough for a phone number or web address) in images that appear in stuff like magazines. Sort of reminds me of those secret decoder toys of yesteryear.

Japanese firm Fujitsu is pushing a technology that can encode data into a picture that is invisible to the human eye but can be decoded by a mobile phone with a camera.

Read: BBC NEWS | Technology | Hiding messages in plain sight

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