The emergence of World Wide Web-based systems and Web transactions has led to the need to find a mechanism that provides electronic signature capabilities as a replacement for written signatures. Such a mechanism should guarantee authentication and nonrepudiation. Many Web applications could benefit greatly form such a mechanism, e.g., banking systems, tax filing, reservation systems, and corporate procedures. This paper discusses the various approaches that could be taken to provide such a mechanism and suggests a solution that provides client commitment on Web documents by means of digital signatures.
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