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Blind signature allows the user to obtain a signature of a message in a way that the signer learns neither the message nor the resulting signature. At present, many electronic voting systems(E-voting) based on the blind signature scheme have been proposed. In this paper, we introduce a novel identity-based blind signature scheme. This signature scheme is constructed in the standard model and achieves the full security(a strong security model in the identity-based cryptography). In addition, we reduce its security to the computational Diffie-Hellman Problem(CDH). Finally, we show our proposed scheme can be used to construct an identity-based E-voting system. To the best of our knowledge, this is the first identity-based E-voting system which is constructed in the standard model.