How iris of an individual can be used to generate the key for private key cryptography?

Introduction:

This project explores how iris of an individual can be used to generate the key for private key cryptography. In other words, I would like to integrate the biometric, in this case iris with cryptography so that security of the system authentication as well as information security can be achieved.

Executive Summary:

It is desirable to protect a private key using a method stronger than simply a password. On a Unix system for example, private keys are locked with a password, which may be guessed by an attacker. Biometrics are an option to possibly replace or complement a password, but the noisy data characteristics of biometric samples make them difficult to use for exact key generation.
Traditionally iris scan data has been used to identify or authenticate a user, but here we will explore a method to use iris scan data to assist in key generation.