Paper Title
Impletentation of 3D Approach in Playfair Cipher
Abstract
In this paper we describe the 3D(5*5*5) playfair cipher . that contains alphabets, numerals and special characters
during its transmission. Here 3D-Playfair Cipher (5*5*5 ) which works on trigraph(combination of 3 alphabets) rather than
using digraph(combination of 2 alphabets) which eliminates the fact that a diagram and its reverse will encrypt in a similar
fashion. 3D-Playfair cipher supports all 26 upper case alphabets {A-Z}, 26 lower case alphabet{a-z}, 10 digits {0-9} and 63
special characters which eliminate the limitation of classical Playfair in which āiā and ājā both characters cannot appear at
the same time. The security of 3D-Playfair is more than the classical playfair cipher by improving the complexity. Various
types of cryptography attacks have been taken under consideration for original Playfair cipher but not vulnerable for this
proposed cipher.
Keywords - 3D playfair cipher , Trigraph