Applications of digital image processing become more widespread, especially as the transfer of images from one entity to another using the internet as the medium of transfer is increasing. Digital image transmission technology has found advanced applications in various fields where security is of paramount importance. Examples of such applications include medical databases and confidentiality of patient records, military databases and prevention of leaking of classified materials, business databases and protection of enterprise-wide records; online document storage systems, etc. Although a lot of research has been done on secure image transmission, several issues still remain unresolved, such as leakages during transmission, and the resulting loss of confidentiality. The current project presents an innovative method for secure image transmission that transforms a selected image by the secret fragment mosaic image approach, where the entire transformation process is controlled by a secret key. The secret key is used later to acquire the hidden content in a lossless manner from the proposed mosaic image. Simulation results are presented that highlight the performance of the proposed method in terms of secure transmission and lossless recovery.