International Journal of Electrical and Computer Engineering (IJECE) Vol. 8, No. 2, April 2018, pp. 1156~1168 ISSN: 2088-8708, DOI: 10.11591/ijece.v8i2.pp1156-1168  1156 Journal homepage: http://iaescore.com/journals/index.php/IJECE Information Hiding using LSB Technique based on Developed PSO Algorithm Wisam Abed Shukur 1 , Khalid Kadhim Jabbar 2 1 Computer Science Dept., College of Education for Pure Sciences/Ibn Al-Haitham, University of Baghdad, Iraq 2 Computer Science Department, College of Education, University of Mustansiryia, Iraq Article Info ABSTRACT Article history: Received Jul 28, 2017 Revised Oct 7, 2017 Accepted Oct 20, 2017 Generally, The sending process of secret information via the transmission channel or any carrier medium is not secured. For this reason, the techniques of information hiding are needed. Therefore, steganography must take place before transmission. To embed a secret message at optimal positions of the cover image under spatial domain, using the developed particle swarm optimization algorithm (Dev.-PSO) to do that purpose in this paper based on Least Significant Bits (LSB) using LSB substitution. The main aim of (Dev. -PSO) algorithm is determining an optimal paths to reach a required goals in the specified search space based on disposal of them, using (Dev.-PSO) algorithm produces the paths of a required goals with most efficient and speed. An agents population is used in determining process of a required goals at search space for solving of problem. The (Dev.-PSO) algorithm is applied to different images; the number of an image which used in the experiments in this paper is three. For all used images, the Peak Signal to Noise Ratio (PSNR) value is computed. Finally, the PSNR value of the stego-A that obtained from blue sub-band colo is equal (44.87) dB, while the stego-B is equal (44.45) dB, and the PSNR value for the stego-C is (43.97)dB, while the vlue of MSE that obtained from the same color sub- bans is (0.00989), stego-B equal to (0.01869), and stego-C is (0.02041). Furthermore, our proposed method has ability to survive the quality for the stego image befor and after hiding stage or under intended attack that used in the existing paper such as Gaussian noise, and salt & pepper noise. Keyword: Cover image Developed PSO algorithm Search space Steganography Stego image Copyright © 2018 Institute of Advanced Engineering and Science. All rights reserved. Corresponding Author: Wisam Abed Shukur, Computer Science Dept., College of Education For Pure Sciences/Ibn Al-Haitham, Baghdad University, Baghdad, Iraq. Email: wisam_shukur@yahoo.com 1. INTRODUCTION The big losses and digital signal transmission due to unwanted access of data with the high demand in both; the security of data becomes an imperative and critical concept. For data securing and preventing them from unauthorized access, encryption and steganography processes is used [1]. The most important concept in any communication process between sender and receiver via the transmission channel is security. The using of advance technology inside the World Wide Web (WWW) to exchange information leads to increase the challenges and risks. However, the management of challenges and risks is possible with using an advanced technology of secure networks but these technologies are not enough for information security over communication between sender and receiver. Therefore, additional mechanisms of security are needed to secure information. [2], an origin of steganography word is Greek, steganography means "covered writing" or "concealed writing" [3]. The main difference between steganography and cryptography is keeping the