Playfair cipher

Target entity: Playfair cipher
Context triple: [Charles Wheatstone, notableWork, Playfair cipher]

• A. Square cipher
  The Square cipher is a block cipher and direct predecessor to the Rijndael algorithm (later standardized as AES), notable for introducing design ideas such as the wide trail strategy.
• B. Playfair
  Playfair is a Scottish surname most notably associated with John Playfair, an 18th–19th century mathematician and geologist known for popularizing geometry and scientific ideas.
• C. de Vigenère
  de Vigenère is the surname most famously associated with Blaise de Vigenère, the 16th-century French diplomat and cryptographer known for the Vigenère cipher.
• D. Lucifer cipher
  The Lucifer cipher is an early block cipher developed at IBM by Horst Feistel that served as a foundational design precursor to the Data Encryption Standard (DES).
• E. Alberti cipher disk
  The Alberti cipher disk is a 15th-century polyalphabetic substitution device, considered one of the earliest mechanical tools for encrypting messages and a foundational innovation in modern cryptography.
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Target entity: Playfair cipher
Target entity description: The Playfair cipher is a manual symmetric encryption technique that encrypts pairs of letters using a 5×5 letter grid, historically used for military and diplomatic communications in the 19th and early 20th centuries.

• A. Square cipher
  The Square cipher is a block cipher and direct predecessor to the Rijndael algorithm (later standardized as AES), notable for introducing design ideas such as the wide trail strategy.
• B. Playfair
  Playfair is a Scottish surname most notably associated with John Playfair, an 18th–19th century mathematician and geologist known for popularizing geometry and scientific ideas.
• C. de Vigenère
  de Vigenère is the surname most famously associated with Blaise de Vigenère, the 16th-century French diplomat and cryptographer known for the Vigenère cipher.
• D. Lucifer cipher
  The Lucifer cipher is an early block cipher developed at IBM by Horst Feistel that served as a foundational design precursor to the Data Encryption Standard (DES).
• E. Alberti cipher disk
  The Alberti cipher disk is a 15th-century polyalphabetic substitution device, considered one of the earliest mechanical tools for encrypting messages and a foundational innovation in modern cryptography.
• F. None of above. chosen