Signature is socially accepted authentication method & is widely used as proof of identity in the people daily life. In this paper, the authors have discussed on the implementation of the online signature verifier using the advanced RISC processor. In that the signatures are generated & stored in the permanent memory in the form of look up table. During the runtime, the signatures are again generated in real time and are compared to the stored, expected signatures. If disagreement occurs, the occurrence of an error is detected & reported.