Abstract
We propose a steganography technique which embeds the secret messages in frequency domain. Unlike the space domain approaches, secret messages are embedded in the high frequency coefficients resulted from Discrete Wavelet Transform. A cryptography algorithm is used to convert the secret messages to an unreadable form before embedding. These algorithms keep the messages from stealing, destroying from unintended users on the internet and hence provide satisfactory security. Blowfish algorithm is used for encryption and decryption of text message using a secret-key block cipher. Blowfish is an evolutionary improvement over DES, 3DES, etc designed to increase security and to improve performance. This algorithm uses a variable key size up to 448 bits.
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