Image security is a process to save digital. One method of securing image digital is watermarking
using Least Significant Bit algorithm. Main concept of image security using LSB algorithm is to replace bit
value of image at specific location so that created pattern. The pattern result of replacing the bit value of
image is called by watermark. Giving watermark at image digital using LSB algorithm has simple concept
so that the information which is embedded will lost easily when attacked such as noise attack or
compression. So need modification like development of LSB algorithm. This is done to decrease distortion of
watermark information against those attacks. In this research is divided by 6 process which are color
extraction of cover image, busy area search, watermark embed, count the accuracy of watermark embed,
watermark extraction, and count the accuracy of watermark extraction. Color extraction of cover image is
process to get blue color component from cover image. Watermark information will embed at busy area by
search the area which has the greatest number of unsure from cover image. Then watermark image is
embedded into cover image so that produce watermarked image using some development of LSB algorithm
and search the accuracy by count the Peak Signal to Noise Ratio value. Before the watermarked image is
extracted, need to test by giving noise and doing compression into jpg format. The accuracy of extraction
result is searched by count the Bit Error Rate value.