Chapter 1 Introduction Part I Literature Review--Comparative Analysis Chapter 2 General Introduction of electronic signaturetechnologies 2.1 What is an e-signature? 2.2 Forms of e-signature technologies and how theywork 2.3 The characteristics of e-signatures 2.4 CAs and the PKI 2.5 Conclusion Chapter 3 General introduction of a signature from a legalperspective 3.1 The usage of a signature in the law 3.2 The definition of a signature and its recognition bythe law 3.3 The functions performed by a signature 3.4 How far e-signature technologies achieve thesefunctions 3.5 Conclusion: some comments …… Part II Evaluation--Economic Analysis Part III Epilogue Bibliography