Every person has a unique finger vein pattern existing within each finger. Unlike facial features or finger print, finger vein authentication systems aren't vulnerable to forgery. Finger vein authentication systems are more secure and reliable, and less expensive, than biometric security systems using finger print. This paper presents a novel security framework based on finger vein pattern. Finger vein pattern in used in id basedcryptography to generate the keys for data encryption. These keys are combined withgenerator of elliptic curve cryptography (ecc) to exchange thekeys using diffieHellman key exchange algorithm. Once the keys are exchanged, the data is encrypted using advance encryption standard (aes). This framework is tested in internet of things (iot) environment for enhancing the security. The iot based security systems implemented in the banks and other organizations can be enhanced considerably using the proposed security model.