In this paper, a new Playfair cipher built on bits level symmetric key cryptographic was
proposed for the purpose of converting pairs of letters (digraphs) into single letters. The …

In this paper, we have proposed an encryption method which is developed by extending
Playfair Cipher to make it more secure. Known as Polyalphabetic cipher, Playfair uses a key …

In this paper we will enhance the traditional Blick Playfair Cipher by encrypting the plaintext
in blocks. For each block the keyword would be the same but the matrix will shift by some …

Automatic recognition of correct solutions as a result of a ciphertext only attack of simple
ciphers is not a trivial issue and still remains a taxing problem. A new compression based …

These days, Information Security is the most summon aspects in the web and network
application due to their swiftly origination. Therefore, secure exchanged data over the …

Play Fairal gorithm has been enhanced in various ways. One of the methods is to increase
the confusion rates by transforming the algorithm into 3D-playfair which has four tables of 4× …

Security is required in order to defend information from unauthorized person on the network.
Therefore, securely exchanging data over the internet is vital. In this context, cryptography is …

The playfair cipher operates on pairs of letters. The cipher text is broken into group of blocks,
each block contains two letters. Encryption and decryption cipher depends on key search …

Twenty-first century is the era of globalization and digitization. Nowadays, internet rules
every aspect of life. Today, human life and activities are not limited to a society or locality. By …

Playfair cipher is the form of block cipher which has no limit on the number of characters in a
message it can do, but it operates on block of characters encrypting and decrypting two …