In 1854, Sir Charles Wheatstone invented the cipher known as "Playfair," named for his friend Lyon Playfair, first Baron Playfair of St. Andrews, who popularized and promoted the cipher.
Michael Mosley, Cassie Newland and Mark Miodownik describe the scientific achievements of Hans Christian Oersted, William Cook and Charles Wheatstone. Prior to their inventions all communication ...
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