[PAR] [TLE] Playfair cipher [SEP] The Playfair cipher or Playfair square or Wheatstone-Playfair cipher or Wheatstone cipher is a manual symmetric encryption technique and was the first literal digram substitution cipher.  The scheme was invented in 1854 by Charles Wheatstone, but bears the name of Lord Playfair who promoted the use of the cipher. [PAR] [TLE] Charles Wheatstone [SEP] Sir Charles Wheatstone FRS (6 February 1802 – 19 October 1875), was an English scientist and inventor of many scientific breakthroughs of the Victorian era, including the English concertina, the stereoscope (a device for displaying three-dimensional images), and the Playfair cipher (an encryption technique).  However, Wheatstone is best known for his contributions in the development of the Wheatstone bridge, originally invented by Samuel Hunter Christie, which is used to measure an unknown electrical resistance, and as a major figure in the development of telegraphy.
[PAR] [TLE] Playfair cipher [ SEP ] The Playfair cipher or Playfair square or Wheatstone - Playfair cipher or Wheatstone cipher is a manual symmetric encryption technique and was the first literal digram substitution cipher . The scheme was invented in 1854 by Charles Wheatstone , but bears the name of Lord Playfair who promoted the use of the cipher . [PAR] [TLE] Charles Wheatstone [ SEP ] Sir Charles Wheatstone FRS ( 6 February 1802 – 19 October 1875 ) , was an English scientist and inventor of many scientific breakthroughs of the Victorian era , including the English concertina , the stereoscope ( a device for displaying three - dimensional images ) , and the Playfair cipher ( an encryption technique ) . However , Wheatstone is best known for his contributions in the development of the Wheatstone bridge , originally invented by Samuel Hunter Christie , which is used to measure an unknown electrical resistance , and as a major figure in the development of telegraphy .
The Playfair cipher was invented in 1854 by an English scientist and inventor of many scientific breakthroughs of what era?
The Playfair cipher was invented in 1854 by an English scientist and inventor of many scientific breakthroughs of what era ?
Victorian era
Victorian era