The invisible ink of the future is invented in Brittany

Like in Mission Impossible, except that the message won't be destroyed. The polymer support is even reusable, indeed...
The invisible ink of the future is invented in Brittany

" Researchers from Rennes Institute of Chemical Sciences have developed a material that can be printed by UV irradiation, able to resist to many write-erase cycles. Among its potential applications, the storage of encrypted data ..."

Press article