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An FPGA implementation of spread spectrum invisible-fragile watermarking algorithm has been reported in (Maity, Banerjee, Abhijit, & Kundu, 2007) and (Maity, Kundu, & Maity, 2009). The host image is divided into 8x8 non-overlapping block. The size of the block was selected to be 8x8 in order to make the algorithm compatible with the JPEG image compression standard. Each block is transformed using Walsh transform. A set of pseudo-noise code patterns is generated using LFSR (Linear feedback shift register). The total number of patterns, N, is equal to the number of bits in the watermark. A 64-bit code pattern,