"In today's trend security and authentication is big issue for that there are lot of application used for authentication and security purpose. Usually these devices are personal devices carried out by user. This paper gives the solution for authentication by using iris detection which is easier than retinal scanning, so the images are acquired by using iris acquisition camera. Images are extracted by PC database and test that image. The tested images are used as input for iris detection in which iris boundary would be detected but flashes are occurred while capturing image so complement the image of eye and detect iris with pupil by using segmentation. Simultaneously the cost and security also improved."