Ab s t r a c t. Biometric is a reliable measurable physical feature as passwords. A biometric framework automatically provides evidence of an individual's identity based on the individual's unique features. Iris recognition is one of the physiological ways used to identify a person in the group and is one of the accurate biometric systems. This paper deals briefly about the surveys those done before about Iris recognition system and its benefits and uses in information technology and security fields. The use of low-cost equipment can help to make iris recognition other standards in security contexts, as the requirements for a secure identification are walking. As human Iris gives a phenomenal design for identification. In recent year, the acquisition, rehabilitation, quality assessment, compression of the image, divisions, noise reduction, normalization, removal of features, iris code match, large-size data base searching, applications, evaluation, performance in different conditions, and multi biometrics have been developing irises recognition in several active fields of research. This research gives at the background of iris recognition and literature of methods in various fields. K e ywor d s : human Iris; biometric; security; authentication; Iris recognition.

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