Integrity,  non  repudiation, confidentiality,  and  authentication  are important entities in   information  security  . cryptography is the field of writing a secret code  . Biometric identity authentication systems are based on the biological uniqueness of a person like face, voice, finger print, iris, gait, hand geometry or signature. Identity authentication using the face or the voice information is a challenging research area that is currently very active.In this paper progress on new method using combination of PCA  and ECC to identify and authenticate a person based on face. ECC is very effient interms of its performance   and  operations with respective  constrained devices. Using this we can simply identify a person based on his/her face . as this is the simple method to implement and required less computational time.This method of implementation is  economy and  also effieceint.