| As the comunication and network technology more and more development and widely use,online shopping,which has a convenient, fast way,deserves more and more people at all ages,which treats the shopping as a trend.Nowadays,Online shopping generally needs a paper invoice(paper invoice mailed to purchasers together with items purchased),however, there are many deficiencies in online transactions.Therefore, to construct a paper invoice role electronic transaction certificate is essential.Firstly, this paper analyzes the existed online trading systems, and proposes a trading programs with the traditional invoice characteristics of electronic invoices.Digital watermarking,which has invisibility, robustness and transmission compression, is better for electronic invoicing system to help to improve the security of electronic invoicing. Digital signature technology has integrity, non-repudiation, whose properties meet the characteristics of traditional invoice. Therefore, the combination of digital signature technology, digital encryption technology and digital watermark technology electronic invoice transaction program seems an effective method.Secondly,with a variety of performance comparison of the existed digital signature technology, digital watermarking technology,this paper selects the appropriate digital signature algorithm and digital watermarking algorithm, and the combination of its application in a new generation of electronic invoice program.Finally, for such acts as tax evasion or tax evasion in the process of online transactions, invoices re-use, and invoices forged,this paper presents an online trading program which can issue electronic invoices, better to solve the problem in the following ways:in the transaction process forced to generate electronic invoices; invoice generation process requires the participation of the buyers,and sellers and credible third party; we can use digital watermarking technology and digital signature technology in the invoice system. |
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