Fourier Masking Encryption Algorithm for Polyalphabetic Symmetric Key Cryptography

Cryptography is the art of keeping
message secret by different methods. In this paper,
a new algorithm has been proposed for symmetric
key polyalphabetic data encryption, namely
Fourier Masking Encryption Algorithm (FMEA).
The concept of Fourier series is exploited
efficiently to generate the random key sequence
from a given password, as randomness is the key
property of polyalphabetic encryption. It has been
shown that the proposed algorithm can provide
high level cryptanalytic complexity for any
unauthorized attempt to decryption. Experimental
results are also provided here, which shows the
efficiency of the proposed one over the existing
algorithms.