TY - UNPB N1 - Some of the research papers related to this thesis may seen at arxiv.org ID - cogprints4013 UR - http://cogprints.org/4013/ A1 - balyan raghuvanshi, Kumar Manoj Y1 - 2003/11// N2 - In this thesis, we propose some directed signature schemes. In addition, we have discussed their applications in different situations. In this thesis, we would like to discuss the security aspects during the design process of the proposed directed digital signature schemes. The security of the most digital signature schemes widely use in practice is based on the two difficult problems, viz; the problem of factoring integers (The RSA scheme) and the problem of finding discrete logarithms over finite fields (The ElGamal scheme). The proposed works in this thesis is divided into seven chapters. PB - I.B.S. Khandri-AGRA KW - cryptography KW - secret key cryptography KW - public key cryptography KW - authentication KW - digital signature KW - proxy signature KW - threshold signature KW - directed signature schemes. TI - A Thesis: A CRYPTOGRAPHIC STUDY OF SOME DIGITAL SIGNATURE SCHEMES. AV - public ER -