Data Encryption Technique based on Enhancement of Blowfish Algorithm in Comparison of DES & DCT Methods
Keywords:
DES, DCT, AES, LSB, BlowfishAbstract
Cryptographic methods or techniques are mathematical operations used to encrypt plaintext into cipher text and vice versa. The improved security of the encrypted message; the algorithm can be improved based on its complexity and the secrecy of the key used to encrypt and decrypt the message. Cryptosystems are a combination of cryptographic based algorithms, keys, and protocols that work together to provide secure communication. The strength of the encrypted data relies by improving the security of the cryptographic algorithm and how the key is secured during transmission over a network. The cryptographic algorithm should be strong enough for preventing the unauthorized access by keeping the key as secret to ensure that only the authorized people are able to access the encrypted data. Encryption of the data is a crucial step in securing data. Implementing the Blowfish algorithm and comparing its performance with the DES algorithm can provide insights into the strengths and weaknesses of both algorithms. By giving the data and key as input to the encryption block, the Blowfish algorithm can encrypt the data to protect its confidentiality. The comparison with DCT can also highlight the trade-offs between performance, security, and implementation complexity. The research in this paper has focused on the enhancement of Blowfish algorithm for securing the content in plaintext and file message using encryption techniques. The performance for Blowfish algorithm can be intensified by minimizing the rounds in reference with increasing the block length of fixed length by using the transformation model.
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