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First Russian Museum of Cryptography Opens in Moscow

Cryptography is the science - and art - of encrypting communications so that no one can read, hear or understand what is being written or said.

It is believed that the use of cryptography goes back to the Egyptians, who hid messages in their hieroglyphs. It began with simple replacements - such as numbers for letters - but is now one of the most sophisticated systems that combines mathematics and cutting-edge technology.

The museum covers the history of hidden communication from the end of the 19th century up to today.