?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=balyan+raghuvanshi%2C+Kumar+Manoj&rft.aulast=balyan&rft.aufirst=Manoj&rft.date=November+2003&rft.title=A+Thesis%3A+A+CRYPTOGRAPHIC+STUDY+OF+SOME+DIGITAL+SIGNATURE+SCHEMES.&rft.inst=I.B.S.+Khandri-AGRA