Hiding a message using quintuple square and inspection of planar graph

Cryptography plays a major role in hiding the data. It converts the plaintext into ciphertext in order to
secure data. Ciphertext is a form of coding which should not reveal the secrecy. Quintuple Square is a 5x5 table
grid with alphabets or symbols. This square table is used to get a ciphertext. Quintuple square encrypts the pairs of
letters, which is hard to obtain the secret message. The recurrence of paired letters is 600 rather than the single
letter in English alphabet. In this paper we encrypt the message using Playfair and Bifid Cipher. The message and
transposition of Playfair is applied to get a planar graph with edge injective labeling and we confer the properties
of planar graph.