Input: Message M, Cover image I_c

Output: Embedded stego-image I_s

Initialization: Read I_c

Preprocessing of M:

Read M

Apply AES encryption to get cipher text, C_t

Binarize C_t

Preprocessing of I_c :

Resize I_c to a square matrix of pixel values P_ij

Divide I_c into 8 × 8 blocks

Apply DCT in each block, P_uv

Generate an 8 × 8 quantization table, Q_t

Quantize each block by P_uv /Q_t and round them, Q_uv

Find DC values by Q_uv Q_uv((u*8)-7,(v*8)-7) and binarize

Embedding in LSB:

Modified cipher text, M_c C_t ♁ P_ij

for each Q_uv

${Q^{\prime }}_{uv}$ : = Embed M_c replacing LSBs of Q_uv

end for

Apply inverse DCT in ${Q^{\prime }}_{uv}$

Reconstruct the image