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  1. The first recorded description of the Playfair cipher was in a document signed by Wheatstone on 26 March 1854.[1]
  2. The Playfair cipher uses a 5 by 5 table containing a key word or phrase.[1]
  3. A different approach to tackling a Playfair cipher is the shotgun hill climbing method.[1]
  4. The Playfair cipher is a written code or symmetric encryption technique that was the first substitution cipher used for the encryption of data.[2]
  5. The Playfair cipher's essential method involves creating key tables that arrange the letters of the alphabet into a square grid.[2]
  6. As an example of the Playfair cipher, begin with the following message text: HELLO WORLD.[2]
  7. The Playfair cipher was invented in 1854 by Charles Wheatstone, but named after lord Playfair who heavily promoted the use of the cipher.[3]
  8. Instead of encrypting single letters, the Playfair cipher encrypts pairs of letter (digrams or bigrams).[3]
  9. next → ← prev Playfair Cipher Program in Java Playfair cipher is proposed by Charles Whetstone in 1889.[4]
  10. In this section, we will discuss Playfair cipher along with its implementation in a Java program.[4]
  11. Playfair Cipher Playfair cipher is an encryption algorithm to encrypt or encode a message.[4]
  12. Since Playfair cipher encrypts the message digraph by digraph.[4]
  13. In playfair cipher, initially a key table is created.[5]
  14. The Play-Fair algorithm uses a 5x5 matrix of letters called Playfair square or Wheatston-square, constructed using keyword.[6]
  15. Below is an example of a Playfair cipher, solved by Lord Peter Wimsey in Dorothy L. Sayers’s Have His Carcase (1932).[7]
  16. The loss of a significant part of the plaintext frequency distribution, however, makes a Playfair cipher harder to cryptanalyze than a monoalphabetic cipher.[7]
  17. The coastwatchers regularly used the Playfair system.[8]
  18. Cryptanalysis of the playfair cipher is much more difficult than normal simple substitution ciphers, because digraphs (pairs of letters) are being substituted instead of monographs (single letters).[8]
  19. 12 Example: Playfair Cipher Program le for this chapter: playfair This project investigates a cipher that is somewhat more complicated than the simple substitution cipher of Chapter 11.[9]
  20. Advantages to Digraphic Ciphers Kahn, in his discussion of the Playfair Cipher, points out several advantages of the digraphic (enciphering letter pairs) ciphers: 1.[10]
  21. The Playfair cipher encrypts pairs of letters, called bigrams.[11]
  22. In this study, the authors proposed an enhanced key security of Playfair cipher algorithm using Playfair cipher 16x16 matrix, XOR, two's complement, and bit swapping.[12]
  23. Also, the proposed method is faster than the existing key security of Playfair cipher algorithm.[12]
  24. The Playfair Cipher is a simple pencil-and-paper cipher which doesn't suffer from some of the common weaknesses with simple substitution ciphers.[13]
  25. In the Playfair cipher, there are many letters that will stand for an E, making it much harder to crack![14]
  26. Throughout my upbringing, I often heard of detectives and spies using the Playfair cipher as a way to encode/decode messages’ meanings.[15]
  27. The Playfair cipher is notable because it is one of the first ciphers that paired letters (also known as a digraph) instead of using a single letter cipher.[15]
  28. The Playfair cipher was originally thought by the British Foreign Office as too complex; they feared that using this cipher would take too much time and would be ineffective in the field.[15]
  29. The Playfair cipher was predominantly used by British forces during the Second Boer War (1899-1902) and World War I (1914-1918).[15]
  30. The first block cipher we will discuss is the Playfair Cipher which dates back to the 1800's.[16]
  31. Usually a Playfair cipher uses a keyword to arrange the alphabet in a five-by-five grid.[16]
  32. To encipher a message using the Playfair square we first break our message into blocks of two letters.[16]
  33. For the second block in the plaintext we find E and T in the Playfair square.[16]
  34. This is a C Program to implement Playfair cipher.[17]
  35. Here is the source code of the C Program to Encode a Message Using Playfair Cipher.[17]
  36. The encryption key for a Playfair cipher is a word, i.e., a nite sequence of characters taken from the set of plaintext characters.[18]
  37. and we want to encrypt the message rocky mountain meadow using a Playfair cipher with this keyword.[18]
  38. Playfair cipher is the first and best-known digraph substitution cipher, which uses the technique of symmetry encryption.[19]
  39. The Playfair cipher is relatively fast and doesn’t require special equipment.[19]
  40. The Playfair Cipher uses digraphs to encrypt and decrypt from a 5x5 matrix constructed from a sequence key of 25 unique letters.[20]
  41. Playfair cipher have made significant progress on improving its security, but little attention was given to optimize or maintain the original time and space efficiency.[21]
  42. To close the gap, this paper proposes Hybrid Playfair, a modified Playfair cipher using a three-dimensional key and 2-character message pairs for encryption and decryption.[21]
  43. This paper exhibits a variation in the implementation of a classical cipher technique, the Playfair cipher.[22]
  44. Sections II and III discuss the classical Playfair cipher technique and other related works in this domain.[22]
  45. Matrix formed with key phrase HELLO WORLD as per Playfair cipher letters from the alphabet (Fig. 2).[22]
  46. Plaintext enciphered to ciphertext as per Playfair cipher with assumed inputs 3.[22]

소스

  1. ↑ 1.0 1.1 1.2 Playfair cipher
  2. ↑ 2.0 2.1 2.2 What is the Playfair Cipher?
  3. ↑ 3.0 3.1 Playfair Cipher (online tool)
  4. ↑ 4.0 4.1 4.2 4.3 Playfair Cipher Program in Java
  5. ↑ Traditional Ciphers
  6. ↑ Encryption using Playfair Cipher
  7. ↑ 7.0 7.1 Playfair cipher | data encryption
  8. ↑ 8.0 8.1 Practical Cryptography
  9. ↑ 12
  10. ↑ Spring 2015
  11. ↑ Detailed Guide 2022
  12. ↑ 12.0 12.1 An Enhanced Key Security of Playfair Cipher Algorithm
  13. ↑ Playfair Cipher
  14. ↑ Can You Solve This Playfair Cipher Puzzle?
  15. ↑ 15.0 15.1 15.2 15.3 History of the Playfair Cipher
  16. ↑ 16.0 16.1 16.2 16.3 Playfair Cipher
  17. ↑ 17.0 17.1 Playfair Cipher Encryption Program in C
  18. ↑ 18.0 18.1 Playfair ciphers
  19. ↑ 19.0 19.1 PLAYFAIR CIPHER
  20. ↑ simulated-annealing-playfair-cipher-breaker/README.md at master · damiannolan/simulated-annealing-playfair-cipher-breaker
  21. ↑ 21.0 21.1 Hybrid Playfair: a modified Playfair cipher combining 2D and 3D Playfair
  22. ↑ 22.0 22.1 22.2 22.3 A variation in the working of playfair cipher

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  • [{'LOWER': 'playfair'}, {'LEMMA': 'square'}]
  • [{'LOWER': 'playfair'}, {'LOWER': 'cipher'}]
  • [{'LOWER': 'playfair'}, {'LEMMA': 'system'}]
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