Abstract: An Elliptic Curve Cryptography scheme for blind digital signature is proposed where a sender proves his/her identity using zero knowledge protocol. In this scheme, the ECC is used to implement blind digital signature and the zero knowledge is used at time of signing where the requester needs to prove his/her identity. The ECC is used because of its difficulty of solving discrete logarithmic problem. The proposed scheme uses zero knowledge protocol to hide the identity of the requester. Hence we maintain the untraceability of the requester and also anonymity of the requester is achieved. Here, in the proposed scheme verifier is not supplied with any of the secret facts of the requester even then the sender is verified using a verifying factor. Hence, the identity of the sender is kept in secrecy. Zero knowledge protocol is used because allow identification without leaking any secret information during the conversation and with smaller computational requirements.