Lyon Playfair, 1st Baron Playfair was a British scientist and Liberal politician who was Postmaster-General from 1873 to 1874.
Lyon Playfair
The grave of Lyon Playfair, East Cemetery, St Andrews
Edith, Lady Playfair (née Russell), John Singer Sargent, 1884
Playfair cipher
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The Playfair cipher or Playfair square or Wheatstone–Playfair cipher is a manual symmetric encryption technique and was the first literal digram substitution cipher. The scheme was invented in 1854 by
Lyon Playfair, 1st Baron Playfair
…Royal Institute of Public Health in 1897. Playfair is also remembered for promoting a new cipher system invented by Charles Wheatstone, now known as the Playfair cipher. Lord Playfair died at his home at Onslow Gardens in South Kensington, London, in May 1898, aged 80. His body was returned to Scotland, where he was…
The Playfair system was invented by Charles Wheatstone, who first described it in 1854.