Main Article Content
Abstract
With the development of Internet, digital signature becomes more and more important for the electronic documents security because of its data integrity protection and privacy. Almost every reasonable scale organisation needs to issue invoices and many more documents. For medium to large businesses, there are substantial benefits in eliminating paper and the associated handling and postage costs. Typically core financial data is held electronically and invoices are archived in digital form to avoid the costs and retrieval issues when using paper-based archiving. Online information systems allow organisations to improve their efficiency, substantially reduce their costs, enhance their green credentials and comply with regulatory requirements. Having timely and reliable access to accurate, final, approved and archived information is today’s business imperative. The present paper focuses on a comparative study of existing algorithms of digital signature on the basis of many hard problems.