Types Of Special Digital Signature

As one of the most important components of modern cryptography, digital signatures are an important tool to ensure the reliability of data and achieve certification. In commercial, financial, military and other fields, in particular in electronic commerce, electronic cheque, electronic shopping, electronic publishing and the protection of intellectual property rights digital signatures have practical applications. With the in-depth study of digital signatures in recent years, many special digital signatures are proposed, such as proxy signature, group signature, blind signature, multi-signature, forward-secure signature etc. Theses signatures have a broad application prospect in e-commerce, public resource management, military orders issued and the signing of financial contracts.In the basis of predecessors' outcome, the main results are the following:Part Ⅰ, describes types of special digital signatures: proxy signature, group signature ,blind signature, multi-signature from the background, current situation and progress, gives some typical signature schemes, points out existent problems of several special mixed signatures and looks into the future directions of research.Part Ⅱ, proxy digital signatures is analyzed and studied. There are...