Abstract: Applications of digital image processing become more common, 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 areas where security is of paramount importance. Examples of such applications include medical databases and confidentiality of patient records and information’s, military databases and prevention of leaking of classified materials, business databases and protection of enterprise-wide records; online document storage systems, etc.This paper reviews Digital image encryption and mosaic image transmission are two approaches to secure image transmission.

Keywords–database, encryption, secure image transmission.

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