We can make a blend of cryptography and biometric to achieve a upcoming security tool. Using unique biometric identity of a person the keys for cryptosystem can be made secure. Within biometric cryptosystems the advantages of biometric authentication are introduced to generic cryptographic key management systems to enhance security.Iris is one of the proven and accurate means to identify person and it does not change throughout life of a person. This paper presents a biometric solution to cryptographic key management problem using iris based fuzzy vault. © 2011 Springer-Verlag.