In Playfair cipher, at first, a key table is produced. That key table is a 5 by 5 grid of alphabets which operates as the key to encrypt the plaintext.

Related MCQs

• ____________ is a mono-alphabetic encryption code wherein each & every letter of plaintext is replaced by another letter in creating the cipher-text.
• A (n) ______ algorithm transforms ciphertext to plaintext.
• The ________________ has piece of the keyword that has the same length as that of the plaintext.
• n = 35; e = 5; C = 10. What is the plaintext (use RSA)?
• The DES Algorithm Cipher System consists of ____________rounds (iterations) each with a round key.
• Which of the following is not an example of a block cipher?
• In _______________ the plain-text is processed 1-bit at a time & a series of actions is carried out on it for generating one bit of cipher-text.
• In _____________ a sequence of actions is carried out on this block after a block of plain-text bits is chosen for generating a block of cipher-text bits.
• What is the number of possible 3 x 3 affine cipher transformations?
• For p = 11 and q = 17 and choose e=7. Apply RSA algorithm where Cipher message=11 and thus find the plain text.